Document Z4wNm8JRbv7978nXM9p7EqNvL

4H6 BUILDINGS HIGHWAYS AIRPORTS RAHAOADS * PU41IC WOtKS FT aliry vNY, pply ated and cess coaOUR ekly :ring : 4 ft. ;ates vhen '.side erse 31. os. T. -ity ,N.Y. >rk NT I0ST0N on. mss NOtTOlR c. SUUKCST CAFAOTV r 1950 Public Housing, Slum Clearance Programs Get Underway 40 312 Federal Building Projects Listed................................. 38 HIGHWAYS AIRPORTS State Highway Officials Say Congress Must Act on Future Federal Aid at This Session............................................. Southeastern Contractors Found to Have Capacity for Much Greater Volume of Work....................................... 35 36 NLRB Considers Construction Industry's Problems Under Taft-Hartley; Counsel Offers Relief................................. 45 A.G.C Committee Confers with TVA Officials on Wage Scale Problem.................................................................... 46 ACCIDENT PREVENTION Contractors on Heavy Construction Project for Engineers Corps Win Highest Safety Honor................................... 47 Hoover Report Group Aims Big Fight on U- S. Con struction Setup.................................................................... 43 1640 Construction Volume 19.3 Billions........................... 44 NATIONAL ASSOCIATION A.G.C. Annual Convention Program Outlined................... 31 Two-Way Radio Installations Prove Big Help on Major Construction Projects........................................................ 42 Teachers College in Texas Has Course in Earth Moving. 46 CHAPTERS BRANCHES Annual Meetings Pick New Officers, Hear Forecasts of Much Work Ahead............................................................ 54 ALSO IN THIS ISSUE News of the Month.............................................................. 5 Comtruetograph*.......................................................7, 9, II. 13 Conaumen' Price Index........................................................... 17 Sidelight* for Contractors....................................................... 19 Editorials...................................................................... Heavy Contracting News....................................................... Si Bid Opening Dates for Large Projects............................... 64 New Equipment and Material*............................................. 67 Buyer*' Guide........................................................................ 85 Index of Advertiser*................................................................ 89 il OUCUTIVS DEPABTMINT H. E. FOREMAN Editor JOHN C. HAYES Lagtl Adviser JOHN B. SWEM Auutant Treasurer BOARD OB DIRECTORS GEORGE B WALBRIDGE WILLIAM MUIRHEAD President Secretary- Treasurer H E FOREMAN Fieo-Prerident G. W. MAXON Director B. L. KNOWLES Director EDITORIAL DEPARTMENT WILLIAM E. WOODRUFF Hanging Editor WILLIAM G. DOOLY, JR. New* Editor DONALD M. POND Auoaatt Editor BUSINESS DEPARTMENT M. S. BECK Burnett Manager GENEVIEVE O'BRIEN Ateittani COVIR Thi CoNSTKUCToa's striking cover for January is a SusamanOchi (Baltimore) photograph of a big fill job on the BaltimoreLNashington Expreasway at the Patapeco River in Maryland. C. J. Langenfelder It Son. Inc., A.G.C., Baltimore, has the fill job. The McLean Contracting Co., A.G.C.. Baltimore, has the contract for the bridge which will span the Patapeco. Ex-Newspaper Photog rapher Bill Ochs wes taking some pictures for the Maryland State Road Commission when he happily found himself with a beautiful ky overhead. Thx Constbucto* cover is the result. Editorial end Advertising OtRss* Munsey Building, Washington 4, D. C. (District 1306) Eastern Advertising OfBce Empire State Building, New York City 1, S. L. Feiss, Eastern Manager (LOngacre 4-6684) Westers Advertising Ofllca DO North La Salle Street, Chicago 2, L. B. Hammond, Western Manager. (RAndolph 6-1843) West Coast Advertising Ogk* M. D. Pugh, 27S1 N. Marengo, Altadena, Calif. (SYcamore 7-28D4) TW Oldd BeWIratiee if TBs Bssaeiotsd Oeecraf Cantrocfere ef Axerfre. lac. Copyright, ism. by The Constructor, lnc. CONTENTS BUILDINGS HIGHWAYS AIRPORTS RAILROADS * PUUIC WORKS ID CITY ;hway Carrie from Queen* bway crosse grid bridge cy--sand and ;e, the City's .S decided ti> , of Long Island t motorists' i* . total )2 ft. b> rids were liftec swere iosertct deforcing ue 1 because mud 1NCOR'* ADts used through oe of the usut this highly e was out of cbt grip of cooattt hat traffic safe l.U.S. Pas.CH KW Toil on dee of: n toii a. New York taerete: `aw York ialond CSti MEN! ON aaa . tosie mcksor. m . aoini> no*. d. e. MiB-siAian daaauat. carad'' 3RUARY \f> N> Building Method Claimed to Save 10 Per Cent on Costs ............................................................................ 40 Building Research Advisor}* Board Holds Climate Clinic 41 HIGHWAYS AIRPORTS $41,000,000,000 Needed for Roads in Next 10 Yean, Asserts Joint Committee on the Ecooomic Report.... 44 iH'lfllTTTT.rTim Missouri Valley Basin Program Progresses...................... 48 Truman Wants Super-Author!ties for Valley Development 50 130,000.000,000 Construction Volume Seen 1950 Possibility 23 flUMJMR UMdH $9,900,000,000 Federal Construction in National Budget for Fiscal 1951.................................................................... 28 mmfmrm Truman Outlines Policies in Stale of Union Message.. 24 Taxes. Housing. Basing Point Among Things Before Congress ....................................................................... 24, 23 President. His Economic Advisers Stress Construction Industry's Vital Role in National Economy................ Committee for Economic Development Offers Plan to Slash Spending by Government....................................... 26 27 Denham Blasts NLRB Over Construction Case Decisions 35 NLRB General Counsel Expands Statement on Con struction Represention Problems..................................... 36 Wage-Hour Changes Become Effective............................. 37 CONTRACT METHOD Heating and Piping Contractors Urge Legislation for Separation of Contracts............................. ....................... 32 NATIONAL ASSOCIATION A.G.C. Convention Program Is Outlined....................... 52 A.G.C. Elects Officers, Directors for 1950......................... 53 ALSO IN THIS ISSUE News of the Month.............................................................. 3 Constructographs .................................................... 7, 9. 11. IS Consumers' Price Index........................................................ 17 Sidelights for Contractors...................................................... 19 Editoriab................................................................................ 21 News of Apprentice Training.............................................. 38 A.G.C. Chapters, Branches Report Election Results ... 56 Bid Opening Dates for Large Projects............................... 64 New Equipment and Materials........................................... 66 Buyers' Guide........................................................................ 81 Index of Advertisers.............................................................. 85 EXECUTIVE OCRARTMENT H E FOREMAN JOHN C. HAYES Editor Legal Adviser JOHN B. SWEM Assistant Treasurer IOAED OF DIEECTORS GEORGE B WALBRIDGE President WILLIAM MTJIRHEAD Secretary-Treasurer H E FOREMAN Pice-President G. W. MAXON Director B. L. KNOWLES Director EOITOEIAI DEPARTMENT WILLIAM E. WOODRUFF Managmg Editor WILLIAM G DOOLY. JR iVevi Editor DONALD M. POND Anocicte Editor tUSINESS DEPARTMENT M. S. BECK Burmese Manager GENEVIEVE MORRIS Auiitant COVES Tn Constructor's cover for February shows the completed con- Zi WOrkL 0n lhe DCW 111 .000.000 Penrose Avenue Bridge in PhUaotipfaia. the largest single construction project ever awarded by the retmsylvaait Highway Department, roley Brothers, Inc., A.G.C., rwaiaotville. New York, poured the last bucket of concrete last ootb and steel work was scheduled to start shortly. Substructures wor|t $6,200,000 and employed up to 390 men during . ^ construction activity, according to a spokesman fWkiwT* fot^ler8 The superstructure is expected to cost $5,- ,,_. 112344 tons of concrete went into the sub* rture and piers. Editorial and Advertising Offices Munsey Building, Washington 4, D C. (District 1306) Eastern Advertising Office Empire State Building, New York City 1, S. L. Feiss, Eastern Manager (LOngacre 4-6664) Western Advertising Office 80 North La Salle Street, Chicago 2, L. B. Hammond, t Western Manager. (RAndolpb 6-1843) West Ceast Advertising Office M. D. Pugh, 2721 N. Marengo, Altadena, Calif. (SYcamore 7-2894) The Oidof Pvbfkotiofi of The Associated Generaf Contractors af America, lee. Copyright itso. by The Constructor, Inc. THI Instructor, February i rso 3 CONTENTS IUILOINOS HIGHWAYS AIRPORTS ffAIUtOADS PUtllC WORKS US. Sees 11-5 Billion Market in Schools; Federal Aid Talked........................... ................................................... S3 HIGHWAYS AIRPORTS Virgin!* Builds Its Most Costly Bridge........................... 34 ACCIDENT PREVENTION 50 Contractors Win Awards in Accident Prevention Work 38 Construction Safety in Action............................................. 39 Offers Comprehensive Accident Report............................. 40 New England. Columbia Basin Projects Are Before Senate 3S Costs Stabilised or Stabilising; Competition Reported Keenest................................................................................ 3 Design to Resist Atom Blasts Could Alter American Skyline................................................................................ 43 Toward Improved Planning of Public Works Programs.. 46 GSA Now Gearedfor Plan LoanProgram........................... 46 Canada ReportsRecordVolume for 1948.......................... 27 mmuurm New Federal-Aid Highway Bill Would Authorise More Funds.................................................................................... 48 Senate Committee Cuts Back Housing Bill...................... 48 Pipeline Construction Booms; Names and Figures Tell Story.................................................................................... 49 Managing Directors Report to 31st Convention.............. 42 INDUSTRY RELATIONS 3 Joint Cooperative Groups Meet; Equipment Discussed 70 ALSO IN THIS ISSUE News of the Month.............................................................. 5 Constructographs.....................................................7, 9, 11, IS Consumers' Price Index........................................................... 15 Sidelights for Contractors....................................................... 19 Editorials.................................................................................. 21 More A.GC. Chapters, Branches Hold Elections and Installations........................................................................... 72 Bid Opening Dates for Large Projects.................................. 80 New Equipment and Materials............................................. 81 Buyers' Guide.......................................................................... 95 Index of Advertisers............................................................... 99 EXECUTIVE DEPARTMENT H. E. FOREMAN Editor JOHN C. HAYES Legal Adviser JOHN B. SWEM Assistant Treasurer ftOAftO Of DIUCTOftS ____ GEORGE B. WALBRIDGE President WILLIAM MtJIRHEAD Secretary-Treasurer H E FOREMAN Vice-President G. W. MAXON Director B. L. KNOWLES Director EDITOftlAl DERAILMENT WILLIAM E. WOODRUFF Managing Editor WILLIAM G. DOOLY, JR. Neios Editor DONALD M. POND Associate Editor tUSINESS DCPAITMENT M. S. BECK Business Manager GENEVIEVE MORRIS Assistant COVER The Constructor's cover for March shows pipeline construction near Baesfield. Mississippi, by Wunderlich-Griffis Construction Co., A.G.C., Tulsa. Oklahoma. On the 112-mile stretch of Transcon tinental Gas Transmission Co. pipeline is Mississippi covered by the contract. Wunderlich-GriffU laid more than a mile and a auarter of 30-inch steel pipe per day, in soft marshy soil where solid footing rarely existed. Pictured is one of the two Buckeye 31 ditchers powered by Caterpillar diesel D13000 engine which were used on the job. Photo wss furnished by Caterpillar Tractor Co. This is one of the many pipeline jobs now under way in many sections of the country, described in the article starting on Page 29. Editorial id Advertising Offices Mnnsey Building, Washington 4, D. C. (District 1306) Eastern Advertising Office Empire State Building, New York City 1, S. L. Feiss, Eastern Manager (LOngacre 4-6634) Wnetern Advertising Office SO North La Salle Street. Chicago 2, L B. Hammond, Western Manager. (RAndolph 6-1843) West Ceast Advertising Office M. D. Pugh, 2721 N. Marengo. AJtadena. Calif. (SYcemore 7-4894) The Official Pebikatiee at The Associated General Centrector* of America, lac. Copyright, ll*0, by The Constructor, Inc. THt CONSTRUCTOR, MARCH 1950 3 SUILOINGS HIGHWAYS KAIUOAOS runic WORKS NATIONAL ASSOCIATION A.G.C. Urgw Steps to Maintain Favorable Construction Conditions at San Francisco............................................ Officers Installed at Stst Annual Convention................... President's Opening Address.............................................. 23 25 29 Building Contractors Division Acts on Separate Con tracts. Hears Speakers on Research. Public Works, and Design........................................................................ 66 HIGHWAYS AIRPORTS Shall We Wait for Traffic's Knockout Punch?......................... %...................... DeWitt C. Greer 79 Highway Contractors Study Needs for Adequate Financ ing. Long Range Planning of Highways......................... 74 Contractors Hear of Developments in Bureau of Reclama tion. Corps of Engineers, and Navy Construction Programs, and Railroad Problems................................... 70 WV.HM.'.mm Construction and the National Econ omy.................................................. W. Walter WUliams Are Business Prospects Undergoing Change?.................................................Edwin G. Noune Public Utilities' Expansion Through Private Enterprise................................... Robert R. Gros 31 38 45 CONTRACTS - SPECIFICATIONS Progress Mode by A.G.C. Committee on Contracts and Forms ................................................................................ 48 The Contractor and His Surety--A Joint Venture.................................................Henry G. Sheehy 49 Contractors' Labor Problems Described in Report............ 61 President's Reorganization Plan Would Abolish Den ham's Job............................................................................ 62 EHESZm Highway BUI Introduced; A.G.C- Makes Statement ... 86 ACCIDENT PREVENTION Many Awards Presented et A.G.C. Convention.............. 83 Committee Cites Strides in Association's Program........... 56 CHAPTERS BRANCHES Secretaries' and Managers' CouncU Elects Officers; Execu tives Praised for Local Work......................................... 95 ALSO IN THIS ISSUE News of the Month.............................................................. 5 Constnictographs........ ......................................... 7, 9, 11. 13 Consumers' Price Index.................. 17 Sidelights for Contractors......................... John C. Hayes 19 Editorials .............................................................................. General .................................................................................. Bid Opening Dales for Large Projects............................... 21 90 92 New Equipment and Materials........................................... 106 Advertisers' Products.......................................................... 119 Index of Advertisers............................................................. 123 EXICimVI DCPAITMiNT H. E FOREMAN Editor JOHN C. HAVES Legal Advttcr JOHN B. SWEM Aeeietant Treasurer 60AK0 Of DttiCTOtS GEORGE B. WALBRIDGE WILLIAM MUIRHEAD President . Secretory-Treasurer H E FOREMAN Viet-President G. W. MAXON Director B. L. KNOWLES Director EDITORIAL DEPARTMENT WILLIAM E. WOODRUFF Managing Editor WILLIAM G. DOOLY, JR. Seict Editor BUSINESS DCPAITMINT M. S. BECK Burmcu Manager GENEVIEVE MORRIS A *sieiant COVER The beautiful buUding on the cover has attracted wide attention in its Oklahoma setting. Recently completed by Mefford Construc tion Company. A.G C.. Enid, it is known as the College of the Bible building at Phillips University in that city. Architect R. W. Shaw of Enid, wbo designed the buUding, died during its construction, and was succeeded by M. N. Wheeler. Exterior is of Bedford, Indiana limestone. Face stone is hand pitched rock faced ashlar which was shipped in random lengths, making it necessary to cut it ? the job. A description of how the father-son organisation of T. Floyd and H. E. Mefford utilised a woodworking saw to speed op cutting will be found oo page 66. (Photo by Dick McConksv, Enid.; Editorial and Advertising Offices Munsey Building, Washington 4, D. C. (District 1306) Eeetern Advertising Office Empire State Building, New York City 1, S. L. Feus, Eastern Manager (LOngmcre 4-6634) Western Advertising Office 30 North La Salle Street. Chicago 2, L. B. Hammond. I Western Manager. (RAndolph 6-1843) West Coast Advertising Office M. D. Pugh, 2781 N. Marengo. Altadena. Calif. (SYcamore 7-2804) The Official PvbJketiee of The Associated General Coofroctors of America, Inc ronthlr Editorial and Executive OAoe. Muneey Building. Washington 4. O. C. Subscription price tS.M per year. 40* per copy (July 7hTConSnSoV^nc* **Cnd ***** outter JuDt 10, 194,> at tbe Po*offlee at Washington. 0. C.. under the Act of March 4. 1871. Copyright it50 by Wt CONSTRUCTOR, APRIL 1950 3 CONTENTS Construction Volume Breaking All Previous Records.... S3 How Can Architects Best Make Preliminary Estimates? .................................................J. P. B. Perry Connecticut Housing Program Unique............................... VA Disdains Private Architects' Work............................... 54 60 62 wmumnnmm Houston Expressway Stretch Already Approaching Capacity.............................................................................. Funds Seen Greatest Highway Problem by A-A5.H.0.-A.G.C. Group ........................................... 49 50 IMUMKbUM Contractor's Ingenuity Puts JobAhead............................. 67 Memo from a Contractor to Employees........................... 68 Force Account Limit Again Asked on Reclamation Jobs.. Slow Action May Delay Appropriations............................. Principal Provisions of New Housing Act......................... Two Federal Aid Highway Bills Pending......................... 67 27 28 28 CONTRACTS SPECIFICATIONS Has the Contractor Recourse to the Courts?.......................................................John C. Bayes 39 ISEmiSED Close Vote Expected on Plan to Abolish Denham's Job.. 36 FOREIGN CONSTRUCTION Netherlands Building Group Sees U. S. Industry at Work 73 INDUSTRY RELATIONS Joint Committee with Surety Association of America Named ................................................................................ 46 ACCIDENT PREVENTION Four Years of Major Work without a Critical Accident................................. Harry L. Highland 30 ALSO IN THIS ISSUE News of the Month.............................................................. 5 Constructographs...................................................... 7, 9, II, 13 Consumers' Price Index......................................................... 15 Sidelights for Contractors............................. JohnC.Bayee 19 Editorial ................................................................................ 21 National Defense .................................................................. 42 Chapters and Branches......................................................... 74 Bid Opening Dates for Large Projects............................... 82 New Equipment and Materials........................................... 83 Advertisers' Products .......................................................... 99 Index of Advertisers.............................................................. 103 li ! EXECUTIVE DEPARTMENT H. E. FOREMAN Editor JOHN C. HAYES Legal Adviser JOHN B. SWEM Assistant Treasurer tOAID OP DIRECTORS GEORGE B. WALBRIDGE President WILLIAM MUIRHEAD Secretary'Treasurer H E FOREMAN Vice-President G. W. MASON Director B. L- KNOTVLES Director EDITORIAL DEPARTMENT WILLIAM E. WOODRUFF Managing Editor WILLIAM G. DOOLY, JR. Netos Editor USJNESS DEPARTMENT M. S BECK Business Manager GENEVIEVE MORRIS Assistant COVER The cover photograph shows girders being bolted into place on one of the many construction jobs throughout the Dominion of Canada. It was taken by Photographer Ross Jackson, of Ottawa, locale of much of the postwar construction boom being enjoyed by Canada. New construction volume there increased by 38 per cent in 1648 over 1947, and was 182 per cent more than in 1641. Building construction has been substantial. Ontario accounts for more than 40 per cent of the Canadian total. Editorial and Advertising Offices Munsey Building, Washington 4. D. C. (District 1306) Eastern Advertising Office Empire State Building, New York City 1, S. L. Feiss. Eastern Manager (LOngacre 4-6634) Western Advertising Office North La Salle Street, Chicago 2, L. B. Hammond, Western Manager. (RAndolph 6-1843) West Ceest Advertising Office M. D. Pugh, 2721 N. Marengo, Aludena, Calif. (SYcamore 7-2864) The Offdd Pvblkmtime cf The Associated Genera/ Contractors of America, Inc. Published monthly. Editorial sod lt.04). Re-entered as second class The Constructor, Inc. Executive Office. Munsey Building. Washington . D. matter June 16. ms. st the Poetoffice at Washington. C. D. Subscription nrice S3 m tier C., under the Act of Mara yvear. 1171. ear per copy (July Copyright is30 by ) TFff CONSTRUCTOR, MAY 1950 3 CONTINTS IUILOINOS HIGHWAYS AiIPOITS KAIltOADS PUtllC WOtXS NT tosroii *. HI notfou LAKCST :apacitt : 1950 Public Works Under Attack by Economy-Minded Groups 13 President Now Seen Opening Drive for Valley Authorities A.G.C.. Bureau of Public Roads Testify on Highway Bill House Limits Reclamation Force Account Work; Appro priations Bill Moving Slowly............................................. Advance Planning Loan Program Shifted to Housing Agency ............................................................................. 14 13 10 16 CONTRACT METHOD Specialty Contracts Problem Requires Industry Harmony 10 Contractor's Coordination Results in Speedy Construc tion of Hospital .............................................................. 30 iimniiiiurm Crossing the Delaware--1050 ............................................. S3 Fast Tunnel Job Averts Big Crop Loss............................. 34 HIGHWAYS AIRPORTS Los Angeles' Freeways Rushed to Cope with Traffic Problem ............................................................................ 37 $018 Million in Airport Projects Needed........................... 38 Atomic Energy Construction: Bidding and Awarding Practices .............................................Wtiliam K. Maher 41 FOREIGN CONSTRUCTION British Impressed by Speed. Low Cost of U. S. Building 46 ACCIDENT PREVENTION Construction Safety in Action: Housekeeping ................ 49 A Contractor's Report to His Employees......................... 50 m-iiiiweH Decisions Affecting Construction......................................... 54 ALSO IN THIS ISSUE News of the Month.............................................................. 5 Constructographs ......................................................... 7,0,11.15 Consumer's Price Index...................................................... 17 Sidelights for Contractors........................... John C. Hayes 19 Editorials .............................................................................. 11 Chapters and Branches........................................................ 56 Industry Relations .............................................................. 38 Bid Opening Dates of Large Projects................................. 60 New Equipment and Materials........................................... 61 Advertisers' Products .......................................................... 75 Index of Advertisers ............................................................ 79 IXKUT1VK DCPARTMINT H. E. FOREMAN Editor JOHN C. HAYES Legal Adviser JOHN B. SWEM Assistant Treasurer tOAID 0$ DIUCTOtl GEORGE B WALBRIDGE President WILLIAM MUIRHEAD Secretary-Treasurer H. FOREMAN Vice-President G. W. MAXON Director B. L. KNOWLES Director IDITOfflAl MPAITMIMT WILLIAM E. WOODRUFF Managing Editor WILLIAM G. DOOLY. JR News Editor BUSINESS WAITMINT M. S. BECK Business Manager GENEVIEVE MORRIS Assistant COVER The serial view on the cover shows a completed section of the Jaybswker Trail, modem gateway into California's Death > alley National Monument. The Argus Range at left hems in the limitless Panamint Valley. An estimated 75,000 tourists will use this new route annually, which was constructed with great diffi culties over s two-year period by the Swedlow Engineering Com pany of Van Nuys; Arthur Johnson Construction Company of Laguna: Dicco. Inc., and Dix Syl Construction Company, both of Bakersfield. The Swedlow organisation encountered unusually difficult rock formations in its 4.7-mile contract. The photograph vos taken by George H. Sturtevant, editor of the 7Yona Argonaut, Trona. California. UHsrisI and Advertising Offices Munsey Building, Washington 4, D. C. (District 1306) letter* Advertising Office Empire State Building, New York City 1, S. L. Feiss, Eastern Manager (LOngacre 4-6634) Wetter* Advertising Office 30 North La Salle Street, Chicago 1, L. B. Hammond. Western Manager. (RAndolph 6-1843) Was! Coes* AdvertUng Office M. D. Pugh, 1711 N. Marengo, Altadena, Calif. (SYcamore 7-1804) fha Official PehHcatlna of The Associated General Coatrectors M < erica, lac. monthly. Editorial sad Executive Office. Maneey Building. Washington 4, D. C Subscription price li H per year, sat per copy (July tr1' Honoured as second etaas matter June IS. lies, at the Postoffice at Washington, D. C,, under the Act of March 4, UTi. Copyright its# by To* Constructor, Inc rut CONSTRUCTOR, JUNf 1950 3 IS f I ew ers ted day set ith -ng :a's Off. N UlSS. D. C. :apacin ' 1950 6UILDIN03 HIGHWAYS AIRPORTS RAILROADS PUIUC WOftKS AW/ v.f; 1930 Director of A.G.C. Membership............................... 173 Nation*] Association's Membership Soars......................... 23 Survey of Construction Industry Conditions..................... 34 996 Billion Forecast for New Construction....................... 2ft Congress Amends Lucas Act, President Vetoes........................................................ John C. Hayes AG.C. Testifies on TVA Force Account............................. Highway Bill Still Under Consideration............................. Only Five Reorganization Plans Rejected......................... 31 35 35 36 Government Intervention Disrupts Labor Relations............................................ James D. Marthall Disputes Board Operating Successfully............................. NLRB Policy and Hewes-Atkinson Decision..................... 41 42 45 $. C. Johnson's Monument to Wax.............. Indictment Stops Separate Contracts Move 66 73 j HIGHWAYS AIRPORTS Governors Assume Leadership in Highways.......... Informing Public Termed Major Problem.............. Xaw Develops Beach Stabilisation Process.......... nH'imim.u.m Articulated Concrete Revetments........................... Challenges of Bridge Foundations........................... lAiMjui.jjumm Status of A.G.C. Affiliated-Units Clarified by Army 49 50 54 56 63 113 ACCIDENT PREVENTION Management-Labor Cooperation Urged............................. Studies Show an Accident Coats an Average 65.250 .......... 91', 92r FOREIGN CONSTRUCTION American Building Industry as Seen Through British Eyes..................................................................................... 101 Architecture Declared Need in Civil Engineering Cur ricula .................................................................................. 78 M.I.T. Students Hear About Building Problems............... 83 CHAPTERS BRANCHES Central Louisiana Chartered; North Dakota Chapter Forming............................................................................... 98 6263 Million in Public Works Approved for Planning ................................................................................... 126 ALSO IN THIS ISSUE News of the Mooth.............................................................. 5 Constructographs...................................................... 7, 9, 11, IS Consumers' Price Index........................................................ 17 Sidelight* for Contractors........................... John C. Hayes 19 Editorials.................................................................................. 21 Dupont Circle Project Opens............................................... 53 B.RA.B. Plans Fire Resistance Conference....................... 68 620 Million LA. Sutler Hotel Under Way....................... 73 Public Relations...................................................................... 77 Bid Opening Dates for Large Projects............................... 110 West Virginia Aviation Group Activated........................... 113 Powerful Tangier Radio Sution Under Way...................... 117 Army* New Organized Reserve Corps............................... 118 1st DP to Become an Apprentice..............Reginald Perry 121 Conferences Stress Apprenticeship Needs........................... 122 A.G.C. Units Participate in Graduations........................... 124 P.CA. Dedicates 63 Million Laboratories......................... 142 New Equipment and Materials...................... 146 Advertisers' Products...................................................... 164 Index of Advertisers.............................................................. 171 CXECUrtVt DEPARTMENT H. E. FOREMAN Editor JOHN C. HAYES Legal Adviser JOHN B. SWEM Assistant Treasurer BOARD OP DIRECTORS GEORGE B. WALBRIDGE President WILLIAM MUIRHEAD Secretary-Treasvrcr H. E. FOREMAN Vice-President G. W. MAXON Director B. L. KNOWLES Director EDfTORIAl DIPARTMINT WILLIAM E. WOODRUFF Managing Editor WILLIAM G. DOOLY, JR. New Editor BUSINESS DEPARTMENT M. S. BECK GENEVIEVE MORRIS Business Manager Assistant Mheriel ui Advertising OAcm Munsey Building, Washington 4, D. C. (District 1306) lM*i Advertising Office Empire State Building, New York City 1, S. L. Few, Eastern Manager (LOngacre 6-6634) Western Advertising Office 30 North La Salle Street, Chicago t, L- B. Hammond, Western Manager. (BAndolph 6-1843) Weal CeaiI Advertising Office M. D. Pugh, *721 N. Marengo, AJtadena, Calif. (SYcamore 7-2864) The Official Pehlfcorfae of The AsiscJqfsd General Cenfroefer* ef America, Inc. Published monthly. Editorial and Executive Office, Munsey Building. Washington 4, D. C. Subscription price 95.60 per year. *0* per copy (July too). Re-entered as second cUss matter June 10, lies, at the Postoffice at Washington. D. C. under the Act of March 4, 1ST*. Copyright 1150 by *o* Constructor. Inc THE CONSTRUCTOR, JULY 1950 9 CONTKNTS "IIIWE mUllOINOS HIGHWAYS AltPORTS 4^0^^ RAIUOADS PUtLIC WOtKS Controlled Economy May Depress Construction............. 43 Reexamination of Civil Public Works Programs Ordered . 43 NATIONAL DEFENSE A.G.C. Defeoae Committee Meet* with Agency Officials, Three A.G.C. Units Alerted.............................................. *4 Navy's Goal It 70,000 Construction Men........................... 14 murwisim Truman Message Calls for Controls and More Spending.. Lucas Act Amendment Pasted by Senate........................... Economy Bloc Hits at Civil Public Works......................... Status of Major Bills........................... ............................. Senate Committee Reports Highway Bill........................... Three More Reorganisation Plans Approved..................... 46 4? 48 48 49 49 White House Renovation........................... Washington State Capitol Dome Repaired HIGHWAYS AIRPORTS Huge Increase in State Auto Tax Yield 31 $3 34 Toronto Subway Is Canada's First............ Progress Report on Chesapeake Bay Bridge Work on Chief Joseph Dam Under Way... 38 39 40 A.G.C. Booklet Lists Advantages of Single Contract .. 44 RESEARCH METHODS Modular Coordination Continues to Attract Interest........ New Methods for Piles of Heavy Buildings................... Youtx-Slick Building Method Called Successful...... New Concrete Pouring Method Saves Time on Dams . 46 4? 4S 48 CHAPTERS BRANCHES Western Chapters Conference Held in Reno..................... 5] Northeast Louisiana Contractors Association Chartered. . 51 Southern California Chapter s Booth Draws Many Visitors 54 ALSO IN THIS ISSUE News of the Month................................................................ 5 Constmctographs ................. ............................... 7, 0. 11, IS Consumers' Price Index...................................................... 17 Sidelights for Contractors........................... John C Hayes 19 Editorials............................................................................... 41 Industry Relations................................................................ 44 Apprentice Training.............................................................. 44 New Equipment and Materials.................................. .. 55 Advertisers' Products............................................................ 67 Index of Advertisers............................................................ 71 EXECUTIVE DEPARTMENT H. E. FOREMAN Editor JOHN C. HAYES Legal Adviser JOHN B. SWEM Assistant Treasurer tOAAD Of DIRECTORS GEORGE B. WALBHIDGE President WILLIAM MTTTRHEAD SecretaryTreasurer H. E FOREMAN Vice-President G. W. MAXON Director B. L KNOWLES Director EDITORIAL DEPARTMENT WILLIAM E. WOODRUFF Managing Editor WILLIAM G DOOLY. JR New Editor RUSINESS DEPARTMENT M. S. BECK Bustness Manager GENEVTEVE MORRIS Assistant COVER The giant, stx-bladed, 104-inch cutter bead, shown raised for oiling, is part of a hydraulic dredge being used in the construction of the eight-and-a-half-mile. 338.000.000 Chain of Rocks Canal, the largest earth-moving project ever undertaken in the St. Louis a*ea. The dredge is capable of excavating the equivalent of 74 rail road freight can of eartb in one hour. The Army Corps of Engineers is doing the job with the McWilliams Dredging Company, A.G.C.. New Orleans, doing the prime earth-moving work. Excavation of the canal and the construction of the levees require moving 43.300,000 cubic yards of dirt and will take leas than two yean to complete. Post-Dispatcb^Black Star photo. Cdhoriol and Advertising OflUet Munsey Building, Washington 4, D. C. (District 1306) Eostern Advertising ORcs Empire State Building, New York City I, S. L. Feus. Eastern Manager (LOngacre 4-0634) Western Advertising Ofllce 30 North La Salle Street, Chicago 4, L B. Hammond, Western Manager. (RAndolph 6-1843) Was# Caost Advertising Oflke M. D. Pugh, 4741 X. Marengo. Altadena, Calif. (SYcamorr 7*3894) The 06dd ArbfksHss d The Associated Oeeeraf Contractors of America, foe. Published monthly. Editorial and Executive OSce. Munsey Buildlnr- Washington 4. D. C. Subscription price tJ.oo per year. 40* per copy (July IS.so). Re-entered as second dam matter June 10, 1S4S, at the PostofBce at Washington, D. C, under the Act at March 4. 187S. Copyright 1150 by The Constructor, Inc THt CONSTRUCTOR, AUGUST 1930 3 CONTENTS WILDINGS HIGHWAYS AIRPORTS RAILROADS PUIUC WORKS E32S9) Survey of Conitruction Industry Conditions.................. Construction Volume Retches New Petk..................... Federal Agencies Set Up Public Works Criteria........ FCC Proposes Radio Rule Changes........ ....................... 3 4 3 7 Control Bill Provisions....................................................... Regulation of Real Estate Credit to Be Used to Control New Construction .......................................................... 36 Billion Appropriation Bill Sent to President.......... Contractors Relief Act Amendment Again Vetoed___ $594 Million Highwsy Bill Passed................................. 8 8 SO S 3 NATIONAL DEFENSE Affiliated Units Alerted....................................................... 3J umiiifW'i Tacoma Narrows Bridge Almost Completed.................. 37 Contractor Erects Office Building and Repairs Historic Church at Same Time................................................... 43 Emergency Clause Again Used in Contracts.................... 48 HIGHWAYS* AIRPORTS Addition to Pennsylvania Turnpike to Open................ 49 ACCIDENT PREVENTION A.G C. Annual Safety Contest Starts in October.......... 33 Winners of Memphis Chapter's Safety Contest Receive Awards ............................................................................ 33 RESEARCH METHODS CooCrete Pavement Teata Under Way........................... i8 wsmm-EEuirm News of the Month............................................................. 6 Coostruetogrspha .................................................7, 9, 11, IS Consumer!' Price Index....................................................... 15 Sidelights for Contractor!....................... John C. Hayes 19 Editorial! .............................................................................. *1 Chapter! and Branches....................................................... 90 New Equipment and Material!......................................... 64 Advertiser!' Product! ......................................................... 79 Index of Advertisers............................................................. 63 RXKUTIV1 DRMRTMINT E. E. FOREMAN Editor JOHN C. HAYES Legal Adviser JOHN B. SWEM Assistant Treasurer ROARD OF DIRRCTORS GEORGE B. WALBRIDGE President WILLIAM MUIRHEAD Secretary- Treasurer H. E. FOREMAN Vice-President a W. MAXON Director B. L. KNOWLES Director IDITORIAl PCPARTMINT WILLIAM E. WOODRUFF Managing Editor WILLIAM G. DOOLY, JR. New Editor USINISS DtFARTMiNT S. BECK Burmese Manager GENEVIEVE MORRIS Assistant COVER Workmen are shown here preparing the pre-building forma on the deck of the mammoth new Tacoma Narrows bridge destined soon to join Tacoma with the scenic Olympic peninsula. The bridge towers loom in the background. Woodworth & Company, Inc.. A G C . Tacoma, has the contract for pouring some 4,300 cubic yards of concrete which is being pieced at a rate of 250 yards per day. Plywood forms were specified for casting the roadway slab. Once the concrete has cured, the plywood forms will be stripped away from beneath by a travelling crane. John A. Roebling't Sons Company is scheduled to complete the contract for anchor steel, cablet, cable bends, suspenders, and other pertinent parti by Oc tober 1. The opening of the til million structure is set for a date between October 1 and November 15. Bethlehem Pacific Coast Steel Corporation it the prime contractor. More details and pic tures will be found on pages 37-38. (Bethlehem Photo.) tdRorW end Adverblint 09!CVS Mtmsey Building. Washington 4, D. C. (District 1306) lettani Advertising Office Empire State Building, New York City 1, S. L. Feist, Eastern Manager (LOngacre 4-6634) Wester* Advertising Office , 30 North LA Salle Street, Chicago t, L. B. Hammond, Western Manager. (RAndolph 6-1843) Waal Coast AdvsrHdeg Office M. D. Pugh, (711 N. Marengo, Altadena, Calif. (SYcamore 7-t894) The Official FeWicatie* of Tht Associated Gaosref Coetreetan of Rarerice, lac. FUhUabtd monthly. Editorial and I.OSLR__f_-e__n_te__re_d___at second dost The Constructor, Inc. Executive OSes. Manser Bonding. Washington 4, D. matter Jone 10, ist, at the Pottoffice et Washington, C. D. Subscription pries tt.se per C. under the Act of Kerch year, iiT. toe per copy (July Copyright 1IS0 by THE CONSTRUCTOR, SEPTEMBER 1950 3 CONTENTS 4UIISINGS < HIOHWAYS ' AI4POITS U3 Govern mmt Start! Movement Toward Controlled Economy......................................................................... NSRB Submit! National Civil Detente Plan.................. Government Iatuet Inventory, Priority Rules................. *4 *4 national association Construction's Port is Defense Subject of A.G.C. Conference........................................................................ Board Meeting Hosts Provide VariedEntertainment.. A.G.C. Responsibilities Heavy in Crises. Couse Tells Boards............................................................................. Boards Pick TwoOutstanding Menfor 1951................ 25 29 SO SI HIGHWAYS AIRPORTS A.G.C. Highway Contractors Find Road Building Still ^ Unaffected........................................................ .............. 45 New Jersey Turnpike Reaches Paving Stage................. 46 n^SBBB33SM Heavy Contractors Recommend Action on Important Matten............................................ ............................... 51 Most Beautiful Bridges of *49 Get Awards...................... 52 Mid-Year Report of the Managing Director to A.G.C. Boards......... .................................................................... 59 opes olnnj JCOOO. c. Tkc J 32 h. vdi. of 4dn. Major ConstructionLegislationReviewedBefore Boards St Actions of 81st Congress (2nd Session) Affecting Construction ................... SS A.G.C-Spoasored Reserve Units Brush Up in Summer Tnining........................................................................... H E. Foreman Bead of Joint Industry Group.............. l' S. Chamber Calls Upon A.G.C. Executives.............. 88 S8 88 Building Group Suggests PollonApprentices.................... 41 Empire States 917-Foot Tower to House All N. Y. TV Stations...................................................................... 42 EXKUnvf MPAETMIKT E E. FOREMAN Editor JOHN C. HAYES Legal Advietr JOHN B. SWEM A Mutant Treatvrer OAID Of DIUCTOtS GEOBGE B. WaLBRIDGE Pmident WILLIAM MUIRHEAD Secretary-Tremoter a E FOREMAN Tce-Pruident G. W. MASON Director B. L. KNOWLES Director CHAPTERS BRANCHES Executives Consider Problems Expected in Wartime Economy.......................................................................... 78 A.G.C. Chapter and BranchConventions Scheduled.... 80 frimiiiHfti1 Nea t of the Month............................................................ Constructographs.................................................7, 9. 11. Consumers' Price Index.................................................... Sidelights for Contractors....................... John C. Hayis Editorials.............................................................................. Foreign Construction.......................................................... Public Relations.................................................................. Labor Relations.................................................................. New Equipment and Materials......................................... Advertisers' Products.......................................................... Index of Advertisers.......................................................... 5 15 17 19 21 55 58 7581 91 95 IDITOtlAl MPASTMINT WILLIAM E. WOODRUFF Managing Editor WILLIAM G DOOLY, JR. Sttct Editor UllNItt DfFAJtTMINT M. S. BECK Burnett Manager GENEVIEVE MORRIS A Mutant per*" bit el Wltrt qualny NT com Tu Constructor's cover for October depicts the beginning of 217-foot tower being built atop the Empire State Building in lork Citv. Since television, unlike radio, is transmitted in ^rsiffct lines, elevation is as important factor in getting distance, ha also important in securing transmission free from shadows md what is known in TV argot as "ghosts." The five television sliona of Manhattan, unable to find an exceedingly high mountain located, are establishing this communal aerie on the *tnda tallest building. Electronics engineers believe the height "*** all mechanical problems, and the competitors can conNetrate on better programs for TV audiences and advertisers. *0fv on Page 42.) editorial and Advertising Offices Munsey Building, Washington 4, D. C. (District 1906) Intern Advertising Office Empire State Building, New York City 1. S. L. Feiaa, Eastern Manager (LOngacre 4-6684) Western Advertising Office Sd North La Salle Street, Chicago 2, L. B. Hammond, Western Manager. (RAndolpb 6-1818) West Coast Advertising Office M. D. Pugh, 2721 N. Marengo, Altadena, Calif (SYcamorc 7-2894) The Oftoed PeWicoriee ef The Aaaaciofed Genera/ Centroetort of America, Inc. NWtlnd noptlily. Editorial aad Eneatt.c OtBoa, Wsaeey Building. Weehlngtoo t, D. C. Sntacrlptioa price 43 0C per year. 4M per eopy (JiAy Tfc **eaa<t * matter June 10, l,u. et tte Poetofiee et waehlngton, D. C_ seder to. Act of Mardi 4, UTO. Copyright 1,30 By !* ** CONSTRUCTOR, OCTOSfR 1950 tUllOINOS * HIGHWAYS ' AIRPORTS Going Project* Msy Continue, Nov NFA t Policy.... NPA Curtail* Amusement and Kindred Building.......... Materials Regulations and Priorities Announced............ Construction Curbs Begin With Credit........................... 00% of Budget Cut* in Construction............................. 15 84 24 25 25 irttEu Fena River Dam Built Against Time............................. Equipment Outlines Course of Bay Bridge..................... 27 28 HIGHWAYS AIRPORTS Shell mi Converts Canal to Highway............................. 81 Contract Termination Clauses Recommended................ 82 Long Range Airport Financing Studied......................... . 82 Apartment Largest Southern Commercial Project.......... 87 NTCA Hears A.G.C. Views.on Contracts....................... 38 Specialty Groups Approach Government....................... 88 Dallas Obstruction Case Reviewed..........John C. Hayes 40 NATIONAL ASSOCIATION G*yl* G. Armstrong Diet Suddenly in New Mexico.. viMAmimw Pre-election Lull Prevails in Labor Moves..................... 49 NLRB Announces Taft-Hartley Policies......................... 49 Digest of Labor Cases Affecting Construction............... 50 Army Head Praises A.G.C. Affiliated Unit*................... 55 CHAPTERS BRANCHES North Dakota Geti Charter ea II2th A.G.C. Chapter . 57 A.G.C. Branch and Chapter Convention Dates............. 58 ACCIDENT PREVENTION A.G.C. Forms Committee with Insurance Groups ........ 61 Management-Carrier Partnership Stressed..................... 62 Severity Rate for 1949 Lowest on Record..................... 66 ALSO IN THIS ISSUE News of the Month.......................................................... 5 Construdograpbs................................................ 7. 9. 11. 13 Consumers' Price Index...................................................... 17 Sidelights for Contractors....................... John C. Haya 19 Editorials................................................................................ 21 New Equipment andMaterials........................................... 68 Advertisers' Products............................................................ 79 Index of Advertisers............................................................ 83 NATIONS men Koarf, (7) S) Florida Aw.. .10) Hrh An., 1(14) Usrcwi ) Pontdttftrsiii EXKUTIVl OCPAJtTMIKT EE. FOREMAN Editor JOHN C. HAYES Legal Adviser JOHN B. SWEM Assistant Treasurer MAW Of OIUCTORS GEORGE B. WALBRIDGE WILLIAM MTJIRHEAD freodoat Secretory-Traamrer E E. FOREMAN TicoPreeidoot G. W. MASON Director B. L. KNOWLES Director fOITOtlAI MPAtTMlMT WILLIAM E. WOODRUFF Managing Editor WILLIAM G. DOOLY. JR. New Editor USINESS DVAtTMiNT S. BECK Buemeet Manager GENEVIEVE MORRIS Aeeietaat ENT osroe <S0. OISS. aoroti c. tlilKtll .ear* cm IM IfSO COVER Photograph depict* float of the 810th Engineer Aviatioo Battalion qouored by the Northern California Chapter, A.G.C., which ap peared in the St. Patrick'* Day parade in San Franciaco, laet Esreh. ThU outfit U one of the 64 A.G.C. unite out of a possible placed on the Army'* Organised Reserve Corps troop liat. Neise for tbeae contingent* will be found in a letter from the ^oetary of the Army addressed to H. E. Foreman, A.G.C.' auging director, Page AS. Mtortal and Advertising Mcas Mtmaey Building, Washington 4, D. C. (District 1308) Iairare Advartiaiag Oflka Empire State Building, New York City 1, S. L. Feiaa, Eastern Manager (LOngacre +4634) Weetera Advartiaiag Miss 30 North La Salle Street, Chicago t, L. B. Hammond, WeatcRi Manager. (RAndolph 6-1843) Weal Caael Advartiaiag Mka M. D. Pugh, 8781 N. Marengo, Altadena, Calif. (SYcamore 7-8884) rfca Otoal PeWkatioa af The Aaaatiatad Saaud CaartwcTora d Amame, lac. NHtiha.idl iaoathlr- IdMorlal and BxsenHva. OShce. Manser Building, Washington . D. C. Suhecrlpbon pries 34.** par raar. sag per copy <-><dr 8e-*ntered. ea aacnul daaa utter lone l, lta, at the Footoaes at Washington. D. C, under tha Act or March 4. lire. Copyright ltM hr w* Conatraetor, Zac. the CONSTRUCTOR, NOVEMBER 1950 WILDINGS HIGHWAYS AltPOffTS lie is Q >- ai s, 4 co >g rrt- j. >rk x :k NT tOSTOft MISS- MOtfOU SLAKE* CAPACITY l 1930 Tempo of Mobilisation Program Increases..................... 1050 Construction Volume May Hit 008 Billion.......... Voluntary Credit Controls Urged On Banks................. Defense Plant Construction May Be Big Volume Factor. 85 84 84 85 m.uuimiiim Two Construction Men Appointed to Wage Stabilia tion Board........................................................................ 86 NLRB Decides Some Cases Under Taft-Hartley.......... 86 Construction Booming in Alaska..................................... 87 0S55 Million Reclamation Program Announced.............. S'* Engineers Announce Military Construction Projects.... SO BB A.G.C. Tcatimooy on Excraa Profit* Tax....................... SI RESEARCH METHODS Highway Research Board's Maryland Road Test.......... SS Services Demonstrate Speedy Soil Stabilization............ S5 HIGHWAYS AIRPORTS New York Thruway Called Answer to Traffic Problem.. 58 Federal*Aid for Highways Apportioned among States... SS Yorktown-Gloueester Bridge Construction Speeded. .. 41 American Contractors Will Dam the Rio Grande.......... 48 Bull Shoals Dam Requires Herculean Engineering Feat. 48 Work on St. Albans Naval Hospital Ahead of Schedule.. 43 Boston Chapter Has Active PR Committee................. 48 NATIONAL ASSOCIATION Boatou Will be Hoet to A.G.C. Sind Annual Convention SI Denver Contractor Nominated for Vice Praaident in 1931 ................................................................................. 31 ALSO IN THIS ISSUE Newt of the Month............................................................ Constractographa.................................................. 7, 9, 11, Cooaumen' Price Index.................................................... Sidelight* for Contractor!....................... John C. Hoyts Editorial* ............................................................................ Apprentice Training............................................................ Chapters. Branches............................................................ New Equipment and Materials......................................... Advertiser*' Product*........................................................ Index of Advertisers........................................................ 3 13 17 19 91 *4 3* 38 87 71 occcimvi MPARTMIMT 1 E. FOREMAN Editor JOHN C. HAYES Logoi Advisor JOHN B. SWEM Assistant Treasurer OAIO or MUCTOU GEORGE B. WALBRIDGE Prooidoot WILLIAM MUIRHEAD Soerotorf Treasurer H E FOREMAN I'toe-/3resides* G. W. MAXON Director B. L. KNOWLES Director CDfTORIAl OfFARTMINT WILLIAM E. WOODRUFF Managing Editor WILLIAM G. DOOLY. JR. Norco Editor IUSINBS DCFAtTMINT M. S. BECE Business Manager GENEVIEVE MORRIS Assistant COVER Sbovn on this month's cover is a typical construction scene on York State's 555-mile six-lane superhighway. It will cost m estimated 0450 million and require three yean for completion. H extends from New York City to the northwestern border of Pennsylvania via Albany and Buffalo. There will be extensions boo tbe main highway to the western borders of Connecticut and Uaaachusetta. Tbe highway will not have traffic lights* toll *aUs and intersections under present plans. For complete feails. see page 58. SdttarW aad Advertising Offices Munsey Building, Washington 4, D. C. (District 1506) Sastern Advertising Office Empire State Building, New York City 1, S. L. Feiss, Eastern Manager (LOngacre 4-6654) Wester* Advertising Office SO North La Salle Street, Chicago t, L. B. Hammond, Western Manager. (RAndolph 6-1845) Wee* Coast Advertising Office M. D. Pugh, 8781 N. Marengo, Altadena, Calif. (SYcamore 7-8804) Tbe Offieof Pvbftcofiea el Tbe Associated Genera/ Contractors of Aseri tatiabed____it_hl_y_. __E__d_it_o_ri_a_l__a_n_d Executive Office. Honsey Building. Washington 4, D. C, Subscription pries I9.M per year, cm per copy (July M). Re-ente--red.*a--s---s-e-c--o-n-*d -cl-a-s--s----- ,tter June 10, ltd. at tbe Fostoflee at Washington* D. C, under tbe Act of March 4, 187. Copyright 1150 by its Constructor, lac Wf CONSTRUCTOR, DECEMBER 1930 3