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FILE NAME: Concrete (CONC) DATE: 1948 Dec DOC#: CONC018 DOCUMENT DESCRIPTION: Journal Article - Industrial Sand Producers Meet DECEMBER, 1948 Bror Nordberg Editor R o c k P r o u i:c t s THE INDUSTRY'S RECOGNIZED AUTHORITY YOL. 51, No. 12 Nathan C. Rockwood Editorial Consultant This Month We Hear :-vrA ;r , 67 Problem s in Producing "M odern" Specification A ggregates Bror Nordberg 71 R ocky's N o te s --B ack-Tracking May H e lp S o lv e a Problem 73 Labor Relations Trends 75 The Personal Side of th e N ews 77 Industry News 81 Hints an d Helps 84 Haw Mafchiftery 86 Perfect? A ggregates an d Concrete N ath an C, R o ck w o o d 88 Safety and O perating Fdeas / National Lime Association, O perating Division, holds f successful m e e tin g - inspects M arblehead lim e Co. plant 93 M anufactured Sand fo r Large Concrete Structures Suitable types of quarry m aterial and plant detail , for production of stone sand to m eet Government specifications1 . : " G e o rg e C. Hawkins 98 Sand for W olf Creek Dam Product from cone crushers, rolls and hamrrierniilis blended into sand from which excess fines are removed y air separation Bror N ord b e rg 102 P ro g re ss Iti P la n t D e v e lo p m e n t 22 pages of pictures showing new plan ts and instai1 la lions typifying-trends 1 0 5 -1 2 7 R esearch in C oncrete an d C em ent ; Experts emihenfc on aeeompHshmhis of research to; dat, and suggest ideas for future study to improve drahiiity of oncfie : ; Bror N ordberg 128 Industrial Sond Producers M eet ;;i ' National industrial gand Association jonsujfers h- . > gienr'TgislaMph,: fate% labor and technical problems : -4_ - , 134 S afety 's P a rt in Production erfteht and g h arry ; Section M eetings of R ational S afety Congress develop some practical suggestions for reducing accidents i. I, Sedlatk 137 P.C.A. C om m ents o n R esearch . M Allen Bates 138 Industrial M inerals Conference , .-..r S tress Com mercial A spects o f N on-m etallie M inerals * a t A.LM.E, M eeting, St. Louis, Mo. : ^ 140 M ining Congress Convention D redging problems, stripping Operations drilling among topics discussed j jjtfjr Scotch Block P lan t Henry . De Woerdf 19 3 C o n crete --C entral-M ix, R eady-M ix, Block ' D ual h atching p la n t o f Louisville^ Crushed S tone Co,, v` Louisville, Ky., proportions concrete m aterials auto- matically to concrete products plant or to central fpixer charging ready mix trirckp : ' - 16 4 Concrete Placed by Precision V ibration Process perfected in Sweden enables A m erican p ro ducer to m anufacture rem arkably high stfngth con crete gratings, using a harsh mix and w ater-cem ent ratio of 0.4 A4. IV. Lairin g 196 H andle Ready-M ix and C oncrete M aterials ' w . B. Len h art |9 9 , W o lt e r B. t e n h o r t. A ssociate Editor D ovid M otine, Associate Editor M. K. Sm ith, A ssistant Editor J. S e d la tk , A ssistant Editor Contributing Editors V ictor J. A ib e Dr. F. O. A n d ereg g M. W . Loving Jam es A. Barr, Jr. H o m e O ffice M o rg a n K. C o ttin g h am , Ad. Manager H. M. G o o d en o w , Dir. of Circulation M a ry A . W h a le n , C irculation Service M. 5. H e n d rick s, Dir. of Research 1 C. M. Hancock, Production Manager C. P. Tents, Field Representative D istrict O ffices Eastern A re a -- Richard Y. Fuller, M anager; John F. Lockrtt, Assist an t, 522 F ifth Ave., New York 18, Tel. M urray Hill 2-7888. C e n tra l A re a -- R. P. Keine, Manager, Hanna Bldg., Cleveland 15, Tel. Mam 4362. M id w e st A r e a -- R. N. Oleson, Rep resentative, 309 W. Jackson Blvd.. Chicago 6, Tel. H arrison 7-7890. W e ste rn A r e a -- 1.. C. Thaon, Man ager, 309 West Jackson Blvd., Chi cago 6, Tel. H arrison 7-7890. Pacific A r e a --Duncan S cott & Co., Mills Bldg., San Francisco 4, Tel. Garfield 1-7950. In Los Angeles 13, 408 Pershing Square Bldg., Tel. Michigan 6203. Lo nd on , E n g la n d -- H arold F. Charles, Managing Director, Maclean-Hunter, Ltd., Sun Life of Canada Bldg. T ra fa lg a r Square. London, 5 . I- ROCK PRO DUCTS is published monthly M A CLEA N -H U N TER Publishmp Corporation. R ( v,g 1-PrKfL,4' West Jackson Blvd.. Cbicaoo 6, Illino is: Hunter. President; E . au ey, J . L. Fraeier, Secretary. Copyright, 1B4- trite as second-class matter. Jan. 30, 1936. at the capo, III dost olfice under the act of " 1ET79. Additional entry at Milwaukee, WU- i ROCK PRODUCTS is indexed repu.arly neering Index Inc SU BSCRIPTIO N INFORMATION Subscription P rice; United States and f k i . three Canada one year, $ 2 .0 0 ; two years, . , w0 C.S.S. years, $4 00. Pan American, one year- - for. years,, $w7' w0 0v.: three years, $10.0-0. sAitl^ JDjO)[: t(h| ree eion, one year, $6 0 0 ; two years, S W " pjtr years. $15 00. Twenty-five cents for sins*e cu I Indexed m the Industrial A rts ![*** Canadian subscriptions and b P 0 in Canadian funds to BOCK frRODttC Box 100. Terminal - A ." Toronto. Canada- ^ To Subscribers-- Date on wrapper. with which your subscription **P ,re. to have address changed. uve old as address. Ant i ng ' i new 2 ROCK P RODUCT S . D e c e m b e r 19 4 8 Industrial Sand Producers Meet National Industrial Sand Association Considers hygiene, legislation, freight rates, labor and technical problems Ne a r l y 100 m em bers an d wives attended the semi-annual meeting of the National Industrial Sand Asso ciation, October 20-22, at the Green brier, W hite Sulphur Springs, W. Va. According to usual custom, the program w as so arranged th a t most of the business discussion and form al meetings were transacted in morning sessions in order th a t tim e would per mit maximum participation in the splendid and diversified outdoor recre ation facilities fo r which The Green b rier is fam ous. L adies' and Men's golf tournam ents were held, there was a bridge tea for the ladies, and enter tainm ent each evening fo r all in attendance at the meeting. The A ssociation will hold its 1949 annual meeting at The Homestead, Hot Springs, Va., May 11-13, and will again have a Fall meeting a t The G reenbrier, October 12-14 in 1949. Principal topics discussed w ere de velopments in th e field of industrial hygiene, recent actions in the States affecting w orkm en's com pensation in surance, the recent decision of the United States Supreme Court in the cement case which invalidated basing point m arketing, current traffic prob lems of the industrial sand industry, technical problems and labor legisla tion. George A. Thornton, O ttawa Silica Co., O ttaw a, 111., presid en t of the National Industrial Sand Asso ciation, Sterling N. Farm er, Sand Products Corp., Cleveland, Ohio, vicepresident, and C. M. H ardy, H ougland and Hardy, Evansville, Ind., treasurer, w ere presiding officers fo r th e th ree meetings. Technical Problems Following reading of the financial report which disclosed the Association to be in sound condition, consulting engineer Stanton W alker briefly re ported on a num ber of technical problems. F irs t he told of conferences a specially-appointed committee has held w ith engineers of the St. Regis P a p e r Co. to discuss m odifications of bag packing m achinery for the pur pose of reducing dust exposure in packing operations. Several modifi cations to improve resistance to ab ra sion and th e stopping and startin g mechanisms of packing machinery, which would decrease m aintenance and dusting, have been discussed hut no decision has yet been reached as to the feasibility of suggested engi neering changes. Producers of ground industrial sand, according to Mr. W alker, require more than one-half million bags per year fo r packing their products. The 10,000 copies of the M anual on S afety in S an d b lastin g , originally printed, have been exhausted, and the Manual is to be reprinted. In his discussion of the testing of foundry sands, Mr. W alker enum er ated the various committees active in studies of grading, fineness, core tests, green strength and other properties of foundry sand. Much attention has been given the degree of reproduci bility of tests under various conditions and, in com menting on work being done to standardize a te st sand, Mr. W alker presented data furnished by the Naval Research Laboratory and Reloxm 9 ot fhe club house ore, left to right, Mrs C. R. W olf, M rs. Jesse T. Morie, Mrs, J. M, Strouss, Mrs. Arnold H. Tonxer and Mrs. A. B. Schlesinger 134 BOCK PRODUCTS. D e c e m b e r . 1948 also made available from various pro ducers of foundry sands. D ata as pre sented showed the effect of method of sieving on mechanical analyses of sand, of re-use of sample on mechani cal analyses of sand, the comparison of mechanical analyses of sand for first use w ith different samples from the sam e lot, th e effect of the sieve sh ak er on m echanical analyses of sand (cumulative and separate percents) mechanical analyses of the same sam ples of sand on sim ilar equipment in different p la n ts, and the effect of type of sieve shaker in different labora tories on mechanical analyses of sand. The various tests under the several conditions in g eneral did not disclose much variation in fineness number although there were significant differ ences observed in critical sizes as screened on v ario u s sieves. Freight Rates T. C. M atthew s, chairm an of the traffic com m ittee, reported briefly on the effects, should recently-requested f u rth e r increases in fre ig h t ra te s be granted rail carriers. The Association and its special committee believe th at discrim ination would be the result if freight ra te increases requested be granted fo r bonded molding sand when shipped in box cars. The result would be a 15 p ercent higher rate th a n fo r sand as shipped in open cars. Wm. W. Collin, Jr., Commerce Council fo r the Association, said th at the latest requested increase in freight rate s, 13 p ercen t over present rates, would b rin g ra te s to a level 194 per cent of th e 1937 level, or 77 percent over the 1945 level. Actually, the 13 p ercent increase would be 20 per cent over 1945 rates. Commenting generally, he said th a t the I.C.C. has been granting increases much more readily and in increasingly larger am ounts than in the p ast which might mean a disposition to m aintain the railroads in sound condition a t any cost. The alternatives, should volume of traffic decrease, m ight be govern ment control of the roads, bankruptcy or subsidies. Labor-Legislation Executive secretary V. P. Ahearn, in bis consideration of labor m atters, discussed regulations announced by the A dm inistrator of the Wage and H our Division follow ing th e decision of the United States Supreme Court in the Bay Ridge Case, the LaborM anagem ent R elations A ct of 194T, and rep o rted on th e sta tu s of collec tive bargaining negotiations in Clor' of ir indi ' case has exce pan sion acri mus call day don : pas or 5 p the pai eac Th. tha be ] La by inc Th pr. at all its in we : pe * i less in the hands of unscrupulous union leaders while also protecting the public in terest by outlaw ing violence. In com m enting on collective b a rg a in ing, Mr. A hearn said th a t agreem ents in the industry are generally sound. He emphasized th a t an individual employe m ust sign an agreem ent in order for an employer to deduct union dues from his compensation. In no case should special union fees, assess m ents or fines be deducted. At the conclusion of the meeting, Mr. A hearn was asked to give his comments on the national and inter national picture and to predict what is in sto re fo r in d u stry in the imme diate future. He said th a t with a record-breaking present employment of 62,000,000 persons, th ere is no pool of men available for w ar or defense industry. R eferring to the Bay Ridge case, Mr. A hearn said th a t a company has no problem unless work is in excess of 40 hr. per w eek: th a t a com pany then becomes subject to the deci sion even if shipm ents are not made across S tate lines. The Bay Ridge case must be considered if labor contracts call for tim e and one-half for S atu r day w ork and double-time for work done on Sunday, or where premium pay is provided for holidays worked or for w ork before 7 a.m. or afte r 5 p.m. on reg u lar work days, etc. For the purpose of computing over-time payment due, it was pointed out th at each week is considered separately. The safe course recommended was th a t the payroll work week in all cases be s ta rte d a t 12:01 am . on a Monday. Recognition of the T aft-H artley Law and its rulings is being evidenced by th e labor contracts being signed by industry members, said Mr. Ahearn. The law will not be repealed and probably is unlikely to be changed, at least radically, because it Is basic ally sound. Mr. Ahearn emphasized its soundness by pointing to provisions in th e law th a t protect employes as well as em ployers and which do not perm it individual w orkers to be help- Amold H. Tourer, New York, N. Y ., take* o whirl ot rhe movie comero Mr. ond Mrs. Henry Roeser, Jr., Mtllvilie, N. J., ot the first tee preparations. He anticipates that th ere will be competition fo r men in view of the present international situ ation, between industry for civilian production and for w ar preparations. There will also be competition for m aterials. The domestic civilian econ omy will suffer. He believes th at pressure for domestic controls of all sorts will grow stronger and th a t price controls will be enacted. A new governm ent would even have found it necessary to make a choice between essential and non-essential industries under the pressure th a t is growing for enactm ent of controls. There will be pressure for m anpower controls in 1949, predicted Mr. A hearn. There will be emergencies but he does not believe there will be w ar in th e imm ediate fu tu re unless be cause of unforeseen incident. In view of conditions, he urged th a t more use be made of handicapped workers, that an effective working force be built th a t can be m aintained, th a t plants be put in first class shape and th at ade quate but justifiable inventory of re pair parts be accumulated. Legislation Covering C om pensation Recent actions in th e S tates which affect w orkm en's com pensation in su r ance w ere reviewed by Association counsel Theodore C. W aters. The principal focus has been m the State of New Jersey w here two bills had been introduced which would amend BOCK PRODUCTS, December, 1948 Mr. bud Mrs. E. J. Compbetl, Thoyer, W. Vo.# stop o moment for the comero enroute to dinner th e New Je rse y W orkm en's Compen sation Act, and where the New Jersey D epartm ent of Labor is preparing a code relating to rules and regulations for the control of silicosis in industry. Mr. W aters who has been negotiat ing with the New Jersey Departm ent of Labor and, with Theodore F. Hatch of the Industrial Hygiene Foundation, has recommended changes to the pro posed rules and regulations covering silicosis control m easures, which are being given consideration. The pro posed code was first draw n up in June, 1948, and w as subm itted to the New Jersey State Industrial Safety Committee for comment. Comprising the committee were representatives of m anufacturing concerns, insurance ca rrie rs and specialists. The second d ra ft w as subm itted in A ugust, 1948, and a th ird d ra ft is now being w ritten p rep arato ry to form al action. Mr. W aters believes the code will be draw n up in final form on or before J a n u a ry 1, 1949. It will be applicable to all industry operations and all industrial sand producers m ust com ply w ith its provisions. In Mr. W aters' opinion, industry will be perm itted reasonable tim e in which to comply. He urged th a t New Jersey producers carefully consider provisions of the code and make certain th a t their operations do comply. P . W . P clm cf, Browntown, W is.r proved to be another picture fan 135 Chorles 6. Rim kle, Zonesvitle, Ohio, left, ond T. C. Motthews, Lcwistown, Penn., listen closely ot the meeting M r, ond M rs, R. S. Lebotd, Rockwood, M ich. Mr. ond Mrs. W. H. Woodward, O ttaw a, III. Junius M. Strouss, Morgontown, W. V a., getting set to slam the boil o mile 136 He briefly discussed Senate Bills Nos. 196 and 306 which had been introduced to amend the New Jersey W orkm en's Compensation Act. The present New Jersey Occupational Disease A ct requires th a t an employe give notice to an employer of con traction of a compensable disease w ithin five m onths a fte r th e date of his la st exposure and th a t he file claim within one year afte r term ina tion of his exposure. Senate Bill 306 would have changed the law to give notice w ithin 90 days and perm it an employe to file claim w ithin one year after he knew or ought to have known th at he had contracted an occupa tional disease. It would have destroyed the defense of lim itations in occupa tional disease cases because it would have been impossible for an employer to prove when an employe knew or ought to have known he had contract ed the disease. M r. W aters w as pleased to report th a t efforts were successful in having the present hill pertaining to compensation for silicosis retained and th a t S en ate Bill No. 306 as passed provides exemption for silicosis and asbestosis in its coverage. He believes the bill will be vetoed by the Governor. Senate Bill No. 196 has passed the Senate but has not yet been considered by the House of Representatives. It would provide general coverage for all occupational diseases and would have made pneumonoconeoses com pensable. M r. W aters believes th a t labor representatives will continue efforts to secure liberalization of com pensation statutes particularly as to provisions applicable to lim itations and disability from dust diseases. The year 1948 h as been an off year for meetings of State legislatures, he said, but the New York State Legis lature has amended the statute appli cable to compensation fo r dust diseas es, reta in in g th e provision denying compensation for p artial disability but elim inating the lim itation of m onetary liability which was a p rin cipal feature. The statute had an escalator clause covering compensa tion. Compensations now payable for perm anent total disability from dust diseases is the same as for any other diseases or injury. This p attern, he believes, will be followed in other industrial S tates in coming legislative sessions, which indicates higher costs of insurance rates. The New York State D epartm ent of Labor has sponsored a program of research in an attem p t to develop a method of evaluation of p artial dis ability from dust diseases, which so fa r has defied th e medical profession. Mr. W aters believes th e W est V irginia statute covering partial disability pro vides the fairest method. It provides limited m onetary benefits for partial disability, which releases the employe]' from any fu tu re claims for disability. In conclusion, he said th a t all S tates but Kentucky, Louisiana, Mississippi and V irginia will be in legislative session in 1949, and th a t labor will [Conjinuei on page J6PJ ROCK PRODUCTS, Decomber, 1948 A . W orsaw, Chicago, III., seems fo be pushing a point here Junius M. Strouss, Morgontown, W. Vo., left, ond Jesse T. Morie, M auricetown, N. J., seemed in friendly mood before golf game Junius M . Strouss, Morgantown, W. V o ., points the woy to golf enemy Jesse T. Morie, Mouriee- town, N. J. Henry Roeser, Jr., M illville, N. J., seems fo disagree with T. F, Hotchs' scoring ruled th a t while the employes supply ing the highway and railw ay jobs were covered by the Act, the employes supplying stone for the dike were not. The Circuit Court of Appeals now said they were, again by a 2 to 1 decision, the one judge who was doubt ful in the first case, having decided the opposite way in the second. In both instances the U. S. Suprem e C ourt was asked to review the Appeals C o u rt decision, in the first by the F.L.S.A. adm inistrator and the em ployes, and in the second by the employer. The high court denied re view in both instances, so both deci sions now stand, much to the adversity of the employer and the confusion of the industry. Under the same kind of reasoning the F.L.S.A. adm inis tra to r contends th a t employes of producers of agricultural limestone come under the law if the farm crops raised on the land th a t is limed w ith th e ir m ateria l subsequently move in interstate commerce. A pparently no such case has yet reached the courts. It seems likely th a t the coverage of the wage and hour law will be extended both by the courts and by the Congress rather than narrowed. This is im portant especially if the m inim um w age is increased to 75c per hour. The two year statute of lim itations applies to many cases, perhaps, but probably no employer is entirely safe if he is not operating in compliance with this law. industrial Sand Meeting (Continued from page 136) be seeking greater benefits and liber alization of compensation laws. Industrial Hygiene Theodore F. Hatch, Industrial Hy giene Foundation, discussed develop m en ts in th e field of industrial hygiene, covering particularly the present status of treatm ent and re search work in silicosis, and codes. In discussing treatm ent for dust diseases, he commented on work presently being conducted at Jefferson Medical School, Philadelphia, Penn., under sponsorship of the Health and W elfare Fund of th e United Mine W orkers which encompasses medical care for disabled anthracite miners, th e train in g of physicians for work in anthracite mining regions and re search. In recognition of the fact th at silicosis of itself does not cause death o r disability, b u t does so only with accompanying infection, inhalation th erap y is under study whereby medi cation is inhaled to destroy infections. In the process, a drug is adm inistered which dilates the air passages, more th a n doubling lung volume, in order th a t medication m ay reach all the way to affected areas. As an adjunct, a face m ask developed during the w ar is used w hereby pressure breathing is employed in the therapy. T husfar, no satisfactory method has been developed to m easure degree o f improvement under treatm ent. The a t W a p a k 's n e w Sand and G ravel Plant A new O hio plant . . . a new E agle Long W eir Screw W ash er - Classifier - D ehydrator. T he W apak Sand and Gravel Plant selected an Eagle for thorough cleaning, exact classification, and m axim um dewatering of sand. M aterial excavated by Boom D ra g lin e is conveyed to a scalp ing screen which shunts over size to a crusher for reduction fo r re-entering system. A ll m a terial is th e n conveyed to a b a r rel type scrubber, shown at start o f flow c h art. It then goes to a 3-declc v ib ra tin g screen w hich produces three sizes of gravel. A ll fines (m in u s *4 **) p assin g lower deck are flumed to the Eagle. H ere the tum bling ac tion of the Eagle screw loosens and scrubs the m ateria! while the constant rising current of water floats out all trash. T he final dew atering stage is so e f fective th at this p lan t uses a 19 pitch conveyor to stack. Fines can be rejected to any desired classification by altering volum e of water and by controlling head and velocity o f overflow with adjustable W eir lips. Send for Catalog 47. Sand a n d G ra vel E q u ip m en t 5WINTEK" DREDGE LADDERS----SCREW WASHERS LOG WASHERS----DEHYDRATORS-----SAND TANKS CLASSIFIERS -- REVOLVING SCREENS E A G L E IR O A I t l l XlOivUllU/ AVCi W O IIK S /CB ITAvlIlvof Iowa ROCK PRODUCTS. December, 1948 169 ROBINSON Ai/i-/lciiocUedc. C O N V E Y O R From C rustier to Storage, from Storage to Car . . . it's h ere that the R obinson Air- Activated Conveyor will save you money in handling. Why? Layout fo r eonT eyhtf mate* rial from plant to ear o r track weald bo similar. R O B IN S O N R e p re se n ta tiv e s <n P r in c ip a l C itie s 2 1 1 - H EAST 4 2 n d Represented in England by B U w -K b o x , Ltd.. London The R obinson System utilizes dry, low-volume air. It elim inates encrustation in convey or lines which often happens in oth er pneum atic system s; m oisture in low-volume a ir is readily controlled. There are no continuously moving parts, screw-feeds, bearings, or other parts which cause high maintenance or replacem ent costs. To handle dry-pulverized or line-granular ma terials in bulk pneum atically is the econom ical tear; to handle them by the Robinson System is probably the m ost econom ical tear. Our engi neers will be glad to draw up Robinson plans and cost estimates fo r your requirements. D ivision of MORSE BOULGER DESTRUCTOR CO. STREET CONVEYOR SYSTEMS NEW YORK 17, N. Y.j Represented in lise French Union and Benelux by Cie Franaise Blaw-Kno, Paria V H With Cleveland Wire Screen Section Assemblies Increase your profits and stop ton nage losses with the specially pre pared, reiniorced screen sections for vibrators. This stan d ard type of edge is available in five different styles for electrical and m echanical vibrating m a chines. bet our wire screen specialist show you how you can adapt these screen sec tion assem blies to increase your profits. There is a CLEVELAND Wire Screen lor every purpose. NO PULL-OUT NO SAC LONGER SCREEN LIFE EXTRA STRENGTH EASY TO CHANGE DRUM-TIGHT TENSION For detailed in fo rm al ion on C lei eland Screen Section A ssem blies w rite today for BULLETIN No. 6. THE CLEVELAND WIRE CLOTH & MFG. CO. 3574 E. 78 STREET CLEVELAND 5,OHIO 172 ROCK PRODUCTS n v-,,. T Q A O and, it seem s, law yers cannot agree on the answ er. The Federal Trade Commission ha* said th a t in delivered pricing or where freight is absorbed, th e offense is conspiracy in violation of the Sher m an Act. The real question involved is proof th at there was agreed-upon uniform ity of practices. In m ultiple basing point pricing, the question becomes one of whether or not there is violation of the Robinson-Patm an Act, which prohibits charging a higher price to one cus tom er than another where competition is th ereb y in ju red . The F.T.C . hag aid th a t net realized at the factory is the governing factor when the product is sold on a delivered price basis, which m eans th a t a customer located nearer to a plant than another should get a lower price. The trouble is th at many vague interpretations are being given, such as th a t it is probably all right to quote discrim inatory prices to meet competition in some cases b ut only if done now or then, or that the probability th a t a pricing system m ay have been injurious between com petitors is sufficient evidence to cause a cease and desist order to become effective, etc., etc. W henever companies are engaged in delivered price selling, in order not to end up with matched prices, it ap parently would be necessary in order to be safe for the seller to be in different to whom he sells and fo r the buyer to be indifferent from whom he buys, as Mr. A ustern appropriately expressed it. As fa r as the cement case is concerned, he said th a t only one thing w as decided and th a t was th a t there had been conspiracy ac cording to the Court. In discussing penalties, he cautioned th a t treble damages and criminal liability m ay he imposed in cases of conspiracy or price discrimination. Both buyer and seller are guilty where the Robinson-Patman Act has been violated. In conclusion he said th at the industrial sand industry is in the clear because its products are priced f.o.b. p la n t plus fre ig h t b u t m ay be effected because of the impact on its custom ers. Registration Mr and Mrs. V. P. AbeaxD, National Industrial Sand Association, Washington, D. C. Mr. and Mrs, James B. Bergs, Pioneer Silica Products Co., St. Louis, Mo M i and Mrs. E. J. Campbell, Sun Sand Co., Thayer, W. Va. Mr. and Mrs. Harte Campbell, Sun Sand C o . Thayer, W . Va. Mr. and Mrs. W, J. Cannon, The Nugent Sano Co , Muskegon, Mich. . Mr. and Mrs. Robert R. Coxey, Industrial Silica Corp., Youngstown, Ohio Mr. and Mrs. J. S. Coxey, Jr., Industrial Silica Corp., Youngstown, Ohio Mr. and Mrs. Russell Cronenweth, Great Lakes Foundry Sand Co., Detroit, Mich Mr. and Mrs E M. Durstine. Keener Sand Clay Co., Columbus, Ohio Mr aod Mrs. Sterling Farmer, Sand Products Corp., Cleveland. Ohio Mr and Mrs. A. Y. Gregory, Whitehead Brothers Co , New York, N. Y Mr and Mrs. C. M. Hardy, HougJand and Hardy, E'vans'ViHe, lod. Mr. and Mrs- R. S. Leboid, Michigan Silica Co.. Rockwood, Mich. Mr. and Mrs- Carter H. Manny, Producers Core Sand Corp., Michigan City, Jnd. T C Matthew; Pennsylvania Glass Sand Corp . Lewistuwn Penn John H . M iller, Mifflin Sand Go , LewJsrown, Penn. Mr. and Mrs. Jesse T. Morie Jesse S. M orie & Son M auricetown, N 1 M r and Mrs. R W M ehiuner. G reat Lakes Foundry Co., Detroit Mich. Mr 3nd Mrs W m Paddison, G reat Lakes Foundry Sand Go , Detroit. Mich. Mr. n d Mrs P. W . Palmer Browntown Silica Co . Browntown W is Mr. and Mrs Forrest S Pearvon Standard Sand Co G rand Haven Mich Mr and Mrs Joel G Pearson Standard Sand Co.. Grand Haven Mich. George F Pettinos Jr , Cape May Sand & Gravel Co and George F. Pettinos Inc Philadelphia. Pern. M r. and Airs John F Puroam National Silica Co Oregon 111 M r. and Mrs Henry ftoeser Jr New Jersey Silica Sand Co and National Pulverizing Co , Millville N . J. Frank T Rogers The National Silica Co . Oregon, 111 Air and Airs Charles G. RunkJe Ayers M ineral Co Zanesville Ohio Mr and Mrs E C. Sawyer Ayers M ineral Co.. Zanesville. Ohio M r and Mr A B Schlesmeer, N ew Jersey PuK erzing Co. New York N Y Air. and Airs. Junius M Strouss Deckers Creek Sand Co.. Morgantown, W . Va. Mr and Mrs Arnold H Tanzer, New Jersey Pulverizing Co New York N Y Mr and Airs. George A Thornton Ottawa Silica Co Ottawa III Mr and Mrs H enry C Thornton. Ottawa Silica Co Ottawa JJl. Stanton W alker, National Industrial Sand Association W ashington D- C Mr and Airs A. W arsaw W edron Silica Co . Chicago, II!. Mr and Mrs C R W o lf National Pulverizing Cr and New Jersev Silica Sand Co Millville. N J Air and Mrs W H W oodward Ottawa Silica Co . Ottawa Jl] Afr and Mr; Aarcus S W right Jr . Sourh R 'ver Sand Co , Old Bridge N J Guests Mr and Air Thomas Austero. W ashington. D C W m M. Avery PIT AND Q uafry Chicago. Ill Wm W . Collins. Jr Pim bureh Penn Clavton Devine, Silica Sand Traffic Ass n. of II! . Chicago III T F Hatch Industrial Hygiene Foundation of America, fnc Pittsburgh Penn. Bror N ordbere, Rock P roducts Chicago, III. A M Ribe H ardy Sand Co.. Birmingham, Ala. Mr and Airs T . C W aters. Counsel Baltimore. Md Symposium on Mineral Aggregates A m e r ic a n S o c ie ty for T e st in g M a t e r ia l s , Philadelphia. Penn., an nounces its " Symposium on M ineral A g g re g ates.'' including id extensive papers, which were presented at the 1948 A.S.T.M. Annual Meeting in D etroit, Mich., and a re grouped into six general categories including: dis tribution, processing and sampling; tests and mineralgica! characteris tics; aggregates for portland cement concrete; aggregates for bituminous construction; aggregates for miscel laneous use; and needed research. The symposium w as sponsored by Com m ittee C-9 on Concrete and Concrete A g g reg ates and Committee D-4 on Road and Paving M aterials, with the follow ing com m ittee in charge: K. B. Woods, Purdue University, chairm an; B. A. A nderton, Allied Chemical and Dve C orp.; E. W. Bauman, National S lag A ssn.; R. F . B lanks, U. S. Bureau of Reclamation; Shreve Clark, V irginia D epartm ent of Highways; R. W. Crum , N ational Research Coun cil; A. T. Goldbeck, N ational Crushed Stone Association; Fred Hubbard, The S tandard Slag Co.; D. E. P a r sons, N ational Bureau of Standards; and Stanton W alker, N ational Sand and Gravel Association. a thousandandone jo b -p ro ved w ire rop e5 Macwhyte Distributors and Mill Depots -- carry stocks for immediate delivery. Macwhyte represent atives will recommend the correct rope for your equipment. Catalog on request. MACWHYTE COMPANY 2 9 4 9 Fourteenth Avenue, Kenosha, Wisconsin M anufacturers o f Internally Lubricated W ire Rope, Braided W ire Rope Slings, Aircraft Cables and Assemblies. Mill Depots: New Y ork Pittsburgh Chicago Minneapolis Fort W orth Portland Seattle San Francisco Los Angeles Distributors throughout U. S. A . and other countries, MO. 532 TEEL S-EG-M-ENT-AL KILN ENDS Easier to Install . . . Longer Service Life About 165 million barrels of cement--over 76% of th e annual output--is produced in plants using either or both of our alloys, PYRASTEEL and EVANSTEEL. PYRASTEEL is equally effective and economical in other high-heat applications, such as conveyor screws, feed pipes, clinker coolers, drag chains, and cement cooling equipment. You can't beat this perform ance of PYRASTEEL Kiln Ends for avoiding burnouts and shutdowns, and insuring continuous production with low cost m aintenance. In the past 20 years over 1000 PYRASTEEL Kiln Ends have been installed. Some have lasted for 14 years w ithout a failure--6 to 8 years' service is quite common. Unit Segments are easy to install or replace. Write /or PYRASTEEL Bulletin C h icago C r htvjh temperatures Steel F oundry K60Z ; e ave & 37 z* s t. CHICAGO 32, LL. Mjktr c< Alloy Stati for 3$ Y#m C ompany ior ROCK PRODUCTS. Decem ber, 1948 173