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II VOLUME TWENTY 1957 NUMBER SIX * ~J J#iv> Si3: >' * Jl 2. '-'| iJS^ Red lead primer and while lead mixed pigment paints for the top coats protect the steel against corrosion on this Aew York Highway bridge. The Central Iron Forks, Inc., Hew York, were the bridge contractors. LEAD INDUSTRIES ASSOCIATION Lead Paints Used On New York Highway Bridges HE excellent rust-inhibiting prop Terties of red lead paint pigment has made it the standard metal protective paint primer wherever steel is left exposed to the weather. This is par ticularly true of State Highway De partments. by far the majority of whom specify red lead for the impor tant shop coat of ail exposed steel highway structures. As a result of this widespread use of red lead primer paints, its bright orange color is and will continue to be the motorist's signpost of-futures highways that will speed him along non-stop, from coast to coast. New 1 ork's Department of Public Works, which has jurisdiction over that state's highway construction, specifies shop coats of red lead over all shop-fabricated steel work. In ad dition. a field touch-up with the same red lead paint is given after con struction on all unpainted surfaces or where the original primer coat has been worn off or has otherwise be come defective. The primer paint specified bv New h ork State is composed of red lead i 95 percent grade I, 78 to 81 percent and the vehicle. 19 to 22 percent, the vehicle to consist of a mixture of raw and boiled linseed oil in the propor tion of one-third to one-half boiled oil, the balance being raw* oil. One of the manv bridges now near ing completion in New York State's highway program is shown in the accompanying photograph. This 110 ft. single-span bridge over the sec tion of the New England Thruway in Bronx County, N. Y. at Bavcnester Ave. is one of several such bridges being constructed by the Central Iron Works, fine. New York Citv. The first and second field coats of paint on this bridge and similar structures is a mixed pigment paint containing a minimum of 50 and a maximum of 70 percent white lead. Atomic Reactor Shielding Windows THE problem of viewing radio active areas that require operation al and maintenance work and at the same time maintaining the necessary shielding against gamma rays and neutron bombardment has been uniquelv solved by the engineers at General Electric Co., Richland. Wash ington. operators of the Hanford Atomic Products Operatioq. Because shielding and, viewing requirements are usually not com patible and even the require ments for gamma and neutron shielding differ greatly, a combina tion of materials, which had to be light transparent, was necessary. One materia! had to be of sufficient den- Detail' of construction of the leaded giass unnf/oir recently installed at the Hanford Atomic Products Operation. Richland. Task. 2-- -- REACTOR SHIELDING WINDOW CONCRETE L EXPANSION TANK HEAVY AGGREGATE , . / CONCRETE `lit hV'- LCjC-r LIA 2 609 2 i -iiv to protect against gamma rays and the other containing sufficient nvdrogen to absorb neutrons. How this was accomplished in the minimal space is shown in the accompanying drawing of a window recently in stalled to view the radioactive rear face of a Hanford reactor. The win dow is two feet thick and gives the ;ame protection as five feet of con-. rete. Construction of the window in\olved three layers of 4 in. thick lead -ilicate glass which has good light transmission for all colors except blue and with a density of 6.2 is approxi mately half as effective as the metal lead in the absorption of gamma rays. The light loss at the surfaces of the glass was reduced by applying a low reflective coating. Neutron protection was afforded by four sheets of 3 in. thick, the largest commercially avail able. "Plexiglas"' which also has good light transmission as well as 8 per cent hydrogen. To eliminate reflec tion at the surfaces of the "Plexiglas" a clear mineral oil with the same index of refraction was placed be tween the layers and confined with a gasket. The two outer surfaces were extensively polished. In the installation of the windows in the concrete shield, extra sheets of lead were placed around the per imeter of the leaded glass to provide shielding in those areas where the concrete was of insufficient thickness. By the use of two of these win dows. engineers and physicists at the Hanford reactor can view an area approximately 80 ft. square and from a central station operate by remote control many slave devices accurately and with comparative ease and safety. Alternate to this type of window is one filled with distilled water which has good light transmission and good resolution with monochromatic light. However, this type of window is not feasible where space limitations are a factor. Because of the limited shield ing afforded by water, the size of the window becomes objectionable at high radiation levels, ten feet of water being equal to approximately five feet of concrete or eight inches of lead. Leaded Porcelain Enameled Steel Panels THE availability of porcelain enam eled metal panels for architec tural applications has generated almost an entirely new concept in modern construction. Architects now find it economically feasible to design buildings having interior and exterior enameled sur faces of varying color hues and shades that blend harmoniously with the sur rounding terrain: to design with col ors that are pleasing to the eye or to serve as company or product iden tification. The mechanical advan tages. such as easv and fast erection and the easily maintained and colorfast surfaces, are also a decisive fac tor in their selection and use. Porcelain enameled steel and alu minum sheets are both used for this purpose. The enamels applied to alu minum of necessity have a high lead content to provide a firing temper ature below the melting point of aluminum and at the same time re'uit, in a. smooth, glossy, tenacious and -weather-resistant coating. Now enamelers are finding the properties of somewhat similar leaded enamels on steel advantageous. By the use of lead in these enamels, the firing temperatures are being re duced from the 1500-1600c F. range to 1000-1100" F. This not only re duces the costs of tiring but at the same time results in enamels of superi THE 0. HOMMEL CO. Yu/c fhe remarkable flatness and lack of distortion oi these steel panels enameled uith Ion tentperature leaded porcelain enamels fired as low as 1.000 to 1.100J F. or resistance to chipping and w eather ing and good elasticity. Enamels fired in this lower tem perature range mature below- the transformation temperature I strain point) of the steel, making possible the use of lower cost cold rolled steel as the base metal. Such problems as warping, sagging, boiling and re boiling, common with higher firing temperatures, are eliminated or ma terially reduced, and thinner sheets can often be enameled successfully. The use of lead compounds in porcelain enamel compositions is primarily as a flux. They have an advantage over most fluxing com pounds in that they can be added in relatively large amounts without causing a dull finish. Lead-bearing porcelain enamels are opening new v istas for the porcelain enameier, the architect and the product- designer. The leaded porcelain enamels used on the steel panels shown in the ac companying photograph were pro duced by The 0. Hommel Co., Pitts burgh. Pa. 3-- -- L I A 2 60 3 Lead waste lines and lead, cup sinks for two of the chemical laboratory tables in the new Education Wing of the University of Arkansas Medical School in Little Rock, Ark. Leads corrosion resistance and ease of fabrication make its use ideal for such installations. Lead's Corrosion Resistance Properties Used To Advantage in Chemical Laboratories EAD has greater corrosion resist- L ance to more acids or combina tions of acids than probablv anv other common metal. As a result, it is ideallv suited for use in chemical laboratories where a variety of cor rosive media is constantly being used, in such surroundings, lead's use has been widespread for such things as hood linings, table tops, trough linines and for the chemical plumbing drain age system. .Many of the common corrosive chemicals used in laboratory experi ments. such as ammonium and sodium hvdroxide. rhromic. hydrochloric, hydrofluoric, phosphoric and of course, sulphuric acid, are all safelv handled by lead or lead-lined equip ment. In the new- Education Wing of the University of Arkansas' Medical School in Little Rock. Ark., a num ber of chemical laboratories are being installed and lead is used extensively. In the chemical plumbing system. DA and 2-in. lead waste pipe, class "C weight. fWW-P-325 -- Federai These teed waste tines Iront nia chem ical laboratory sinks entering a single lead drum trap require no special pi lings for the sharp bends. I I A 2 6 0 4 When chemical corrosives are to be conveyed in lead, all joints, shown here, should be lead welded. Lining the troughs in the laboratory tables with 4-lb. sheet lead. Specification for Pipe, Bends and Traps; Lead (For) Plumbing and Water-Distribution) will carry the chemical wastes from 300 laboratory fixtures to acid resisting cast-iron drainage lines. Lead drum traps as well as lead cup sinks are also being installed. All joints in the lead pipe and be tween the lead pipe and fittings are being made by lead welding, the method of joining lead that should always be used when chemical cor rosives are apt to come in contact with the jointing material. Troughs to carry the chemical wastes from each of the work posi tions at the laboratory tables are be ing lined with 4-lb. sheet lead and the joints are also lead welded. In jobs of this kind, the advan tages of lead, other than its corrosion resistance, are its ease of fabrica tion. need for very few special fittings, and the absence of joints over long lengths and in the sharp bends and turns, advantages that are indicated in the accompanying photographs. Joints are always a potential source of trouble particularly in cor rosive atmospheres and the fact that lead requires a minimum number of joints can add immeasurably to the life of the installation. The Kewaunee Co:~supplied the lead cup sinks and other laboratory equipment and the chemical plumb ing svstem was installed by the Arkansas Mechanical Contractors, Inc., North Little Rock. Ark. Copies of the Federal Specifica tion WW-P-325 previously mentioned and a suggested specification for the use of lead in chemical laboratories entitled ``Suggested Specifications for Chemical Laboratory Drainage Sys tem" may be had from the Associa tion free, upon request. Another of the many lead waste lines from the lead cup sinks in chemical laborators tables installed in the new u ing of the University of Arkansas' Meiib nl s<huni. .1 -- O-- LIA26095 Plumbing In Place Before Building is Erected HE concept of small home and Tbuilding construction wherein the orderly procession of building trades men on the construction site would be foundation worker, bricklayer or carpenter. roofer and then the plumber, is undergoing a radical change in many sections of the coun try. The plumber now finds himself on the job simultaneously with the The roughing-in for a first floor toilet room in the building to be erected around it, in Tulsa, Okla.. has lead uastes and vents for the the lavatories and lead water closet connec tions. foundation worker, thus speeding construction and lowering cost. As the accompanying photographs of recent construction jobs in Tulsa. Okla. and Shreyeport. La., would in dicate. it has become a common sight to see the plumbing roughing-in completed before anv other part of the prospectiye building is visible. One of the problems connected with the installation of the plumbing before the house is built is the ques tion of accuracy in placing the plumbing roughing-in. When con struction is well enough along to set the fixtures, any slight errors made essary, to compensate for whatever in the placement of the roughing-in small errors in measurement that may can create a serious and costly prob exist. lem with rigid pipe connections. How Small ranch-type homes now under ever. with lead connections, such in construction in Cherokee Park, just accuracies are not a serious problem. outside Shreveport. La., are having The flexibility of lead permits bend the plumbing roughing-in set in place ing the connection bv hand, if nec before the concrete slab is poured and lead is being used for fixture connections. The Elton J. 'Xolfe Plumbing Co., of Shreveport. La., is installing 4-in. lead bends for the water closets alone with lead stubs for the bathtub wastes in each of the homes' l1., baths. The flashings for the plumbing vent stack passing through the roof are to be 4-lb. sheet lead. The same construction procedure is also being used in the new Home Building and Loan Association build ing in Tulsa. Okla. The plumbing contractor. F. Glenn Co.. Tulsa. Okla.. has completed the installation of the plumbing roughing-in for the first-floor toilet room prior to erection of the building. Lead waste and vent connections tor the lavatories and lead bends for the water closets will provide the necessary llexihilitv to the plumbing system. Prior lo the pouring oj The contractor has wisely placed the concrete slab 'or paper packing tubes around the lead this small home near l Shiei eport, La.. the bends, see accompanying photograph. plumbing roughing-in. !o protect them during the pouring inc/tiding lend bends, is ret in p/nce. of the concrete lioor and upon their removal will leave sufficient working space for setting the water clo-ets. 6-- -- ^ ^ 26096 R a d io a c t iv e isotypes for physi cal therapy and medical research are being used in increasing number? in hospitals throughout the world. Be cause the half-life of many of these radioactive isotopes is limited, rapid delivery schedules must be maintained and this is accomplished by the use of regular commercial airline flights. An overseas shipment oi radioactive isotopes is removed from its lead box and placed in the tip oj airliner's wing to begin its long journey. One of the airline companies en gaged in this operation is B.O.A.C.. British Overseas Airline Corp., which radioactive materials assure that there wooden box. The containers are im handles several thousand such ship is no risk of contamination to either mediately transferred to a safe made ments originating in Great Britain the crew or passengers. of 2 in. thick lead where they await every year. Special regulations laid The consignments for overseas des shipment. Shortly before the aircraft down by the International Air Trans tinations arrive at London Airport is due to leave, the head loader takes port Association for the handling of in lead containers, carried in a the consignment out to the tarmac and transfers the radioactive material in its casing from the lead container to a small compartment in the tips . - -- y.- c of the airliner's wings. Here it is com pletely safe being well away from the .........* The consignments of radioactive isotopes ar rive at London airport in lead containers car ried in a wooden box. passengers and crew. Both B.O.A.C. Argonaut and Constellation airliners are equipped to carry consignments in this fashion. The shipments handled by B.O.A.C. are distributed chiefly by the Radio Chemical Center at Amersham. Bucks, and the Atomic Energy Research Establishment. Harwell. Berkshire, both in England. The head loader on the tarmac at London air port demonstrates the use of a three foot long pole in handling the radioactive, materials. RADIOISOTOPE CONTAINERS USED BY OAK RIDGE NATIONAL LABORATORY Reprint of a report with the above title, containing descriptions and detailed drawings of shipping containers, prepared by the Oak Ridge National Laboratory, is avail able, free of charge, upon request to the Lead Industries Association, 60 East 42nd St., New York 17, N. Y. LIA26097 t MEMBERS OF THE LEAD INDUSTRIES ASSOCIATION ALLIED SMELTING CDRP._ Sllft W. Lincoln Aye., Milwaukee 14. Wia. ALPHA METALS. INC.--__________Bo* 34. Bergen Stgtioo. Jersey City 4, N. J. IMPERIAL TYPE METAL CO.--------------- 3400 AramtnfO Ave.. Philadelphia 34. p*. INTERNATIONAL SMELTING 4 REFINING CO. (Anaconda Sties Co., Agents) ) THE AMERICAN METAL CO.. LTD61 Broadway, New ' York 6. N. Y. AMERICAN SMELTING 4 REFINING CO____ 120 Broadway, New York 5. N. Y. AMERICAN ZINC. LEAD A SMELTING CO-Ptui Brown Bldg., St. Louu 1. Mo. KNAPP MILLS. INC , 25 Broadway, New York 4. N. Y. 23-15 Borden Ave., Lon* Island Citv 1. N. y LEAD PRODUCTS CO.. INCP.O. Box 1341. Houston i. Texvi t THE ANACONDA CO.- - -A Broadway, New York 4, N. Y. LUCKY FRIDAY SILVER-LEAD MINES COWallace. Idaho K THE C. A. AVRJL CO., LEAD PRODUCTS DIVISION JOHN R. MacCREGOR LEAD CO________ 4520 W. ] 5 St.. Chicago 23. Hi. Laafdoo Earn] Rd. 4 Seymour Ave., Cincinnati 12. Ohio BERS 4 COMPANY. INC.------------------- Ashland A Lewu Sta.. Philadelphia 24. P*. `BROKEN HILL ASSOCIATED SMELTERS PROPRIETARY LTD. Coilia* House. Melbourne Cl. Australia MIKE HORSE MININC 4 MILLING CO-- THE MURDOCK LEAD PRODUCTS CONATIONAL-LEAD CO.NEW PAR1C!illNINC CO_________ __ 620 Power Bldg.., Heleoa. Mont. -P.O. Box 5298, Dallas 2. Texas .211 Broadwa y. Ne*' York 6. N. Y. -Xeetjey, 'BROKEN HILL SOUTH. LTD._ 194-C, G.P.O., Melbourne. Australia NORTH BROKEN' HILL. LTD.. lox 1903-R. G.P.O.. Melbourne. Australia THE BUNKER HILL CO------------------------- 660 Market St.. San Francisco A. Calif. THE OKONITE CO._ ____ - . ... _________ Passaic. N. J I CAMBRIDGE SMELTING CO-------- ------------200 Pacific St., Cambridge. Mass. 'CERRO DE PASCO SALES CORP100 Park Ave., New York 22. N. Y. OUN MATHIESON CHEMICAL CORPEast Mton. ill PEND OREILLE MINES 4 METALS CO._Old Nati. Bk. Bid*.. Spokane 8, Tain THE CONSOLIDATED MINING AND SMELTING CO. OF CANADA LIMITED PENNSYLVANIA SMELTING 4 REFINING CO. P.O. Box 1030. Place D'Armes, Montreal 1. Canada DAY MINES. INC----- - -- ., , - , , ____ _, --, -Wallace. Idaho 3100 . Ontario St.. Philadelphia 34. ?a PHELPS DODGE COPPER PRODUCTS CO___ 300 Park Ave.. New York 22. N. Y OtCKSON WEATHERPROOF NAIL CO____________ _Box 590, Evanaton 4, HI. REVERE COPPER AND BRASS, INC.. FOIL DIVISION DIXIE LEAD CO----------------------------------------------------- ----P.O. Bo* 8625. Dallas. Tex. E. 1. DUPONT DE NEMOURS 4 CO.. INC--Wilmington 98. Del. 196 Diamond 5t.. Brooklyn 22. N. Y RIVER SMELTING 4 REFIMNC CO________4195 Bradley Road. Cleveland 1. Oh.o THE EAGLE-PICHER Building, Cincinnati 1, Ohio ROCHESTER LEAD WORKS. INC380 Exchange St.. Rochester 8. N. Y. THE EDLOW LEAD COP.O. Bo* 1936, 729 Bank St.. Columbus 16. Ohio ST. JOSEPH LEAD CO250 Park Ave., New York IT. N. Y THE ELECTRIC STORAGE BATTERY COBox 8109. Philadelphia I. Pa. ETHYL CORP--100 Park Ave.. New York 17, N. Y. EU5TON LEAD CO. (The Clidden Co.)_ . 500 Penn Ave., Scranton 3, Pa. EVANS LEAD DIVISION (National Lead Co.)__Box 1467, Charleston 25. W. Va. FEDERATED METALS DIVISION OF AMERICAN SMELTING 4 REFINING CO. --' 120 Broadway. New York 5, N. Y. AARON FERER AND SONS CO____________ 1QI-19 S. 8 St.. Omaha 8. Nebr. THE FIRESTONE TIRE 4 RUBBER CO--Box F, Firestone Park. Akron 17. Ohio THE FLEMM LEAD CO.. INC52-01 31 Place. Lon* Island City 1. N. Y. WL P. FULLER 4 CO. -- 301 Mission St.. Stn Francisco 19. Cal. GARDINER METAL CO4820 S. Campbell Ave., Chicago 32, 111. GLASER LEAD CO.. INC-----------------------------31 Wyckoff Ave.. Brooklyn 27. N. Y. GOLDSMITH BROS. SMELTING 4 REF1N1NC CO. SHATTUCK DENN MININC CORP120 Broadway, New York 5. N. Y S1PI METALS CORP1708-1720 Elston Ave.. Chicago 22. 111. SOC1ETE MINIERE ET METALLURGIQUE DE PENARROYA 12 Place Vendome. Pacts 1, Fnoce SUNSHINE MINING CO115 N. Second St.. Yakima. Wash. UNITED PARK CITY MINES CO-Continental Bank Bldg., StU Lake City 1. Utah UNITED STATES SMELTJNC REFIMNC AND MININC CO. 57 William St.. New York 5. N. Y THE VICTORY WHITE METAL CO________6100 Roland Ave.. Cleveland 27. Ohio HYMAN VIENER 4 SONS5300 Hiteber St.. Richmond 5, Va. VULCAN LEAD PRODUCTS CO1545 W. Pierce St.. Milwaukee 4. Tia. WESTERN ELECTRIC CO.. INC--195 Broadway. New York 7. N. Y. r> Ill North m abash Ave.. Chirafo 2. III. WESTERN LEAD PRODUCTS CO____4530 E. Pacific Way. Lo Ange)-- 22 Cri. HAMMOND LEAD PRODUCTS. INC------------ 5231 Hobmto Ave.. Hammond. Ind. WHITE METAL ROLLING 4 STAMPING CORP-80 Moultrie St., Bkiyn 22. Y Y. HECLA MINING CO Wallace. Idaho THE ZINC CORP. LTDBox 284-0. G.P.O., Melbourne. Australia HUDSON 5MELTINC 4 REFINING CO85-95 Hyatt Ave.. Newark 5. N. J. Associate Member L* The following articles and reprints contain information, drawings and specification, on the use of lead product* helpful to architects, engineers end others interested. Thev are available, free of charge, except where otherwise indicated, upon request to the LEAD INDUSTRIES ASSOCIATION. 60 EAST 42nd STREET. NEW YORK 17. N. Y. MATERIALS OF CHEMICAL CONSTRUCTION LEAD WORK FOR MODERN PLUMBING THE STORY OF LEAD-- MATERIALS THE ANNUAL REVIEWS -- LEAD AND LEAD ALLOYS 81.30 Postpaid, 81.00 per copy in quanti ties of 10 or more RAILROADS BUY (Part* 1 and 2) Lead from mine to finished proaurt with oecial Up-to-date reports on new developments in the uses Profusely illustrated wiib o'er 140 pbotograobs and reference to its use* b the railroads. Repnntea < of lesd and lead alloys in chemical construction drawings, this textbook presents cJesrlv to trie from "Railway Purchases and Stores." December. including research progress, engineering applica plumbing student the oecesstrv tools, procedures 1954 and February. 1955. tions. and technologies! advancements. With bib and the methods required for leto work. liography. 19S6. 195S and 19S4 review* (editions are aot cumulative) available. Reprinted from "Industrial and Engineering Chemistry.'' September. 1956. October. 1955. and October, 1954. LEAD BUILDING CONSTRUCTION BULLETIN* A senes of specifications for the use of lead in building construction. (Available separately.) RED LEAD TECHNICAL LETTERS A enes of technical letters rootaining red paint formulations. (Available separately.! lean ft LEAD REFERENCE SHEET (Parts 1 * 2) A short outline of the types, grades, and chemical and physical properties of lead in chemical con struction. with summary of the corrosion char acteristics of lead in use with a Urge number oi BULLETIN NO. 1 Specification for Lead Waste Connections for Plumbing Fixture* wnb Integral Traps (Water Closets-- Pedestal Urinals--Service Sinks). Technical Letter No. 3--Red Lesd Primer* for Atmospheric Exposure* Technics! Letter No. 6 -- Red Lead Psint Formulation* common chemicals and solutions used in various industries. Reprinted from "Chemical Engineering Progress." Jandarr and February, 1955. BULLETIN NO. 2 Specification for Lead Shower and Safe Pans Technical Letter No. 7--Psint >ytem* fur Hydraulic St rue lures f, INSPECTING LEAD LININGS Latest methods of testing and inspecting sheet lead and bonded lead linings used in the chemical process industries are described. Reprinted from "Chemical Engineering." November, 1956. HEST DESIGNS FOR LEAD INSTALLATIONS A special report on (he applications of lead and lead allows in the chemical and metallurgical in dustries. Recommended practice for joining lead sheets, aod the construction of wood stave tanka, launder*, tower* and Rues where lead is involved ire included. Reprinted from "Chemical Engineer ing," March. Anril aod Mar, 1956. SUGGESTED SPECIFICATIONS FOR CHEMICAL LABORATORY DRAINAGE SYSTEM A complete guide to the aeiectioe and installation of drainage ivitemi in cbetnicti laboratories. In cludes laboratory waste aod 'ent piping, traps, sinks, acid travs. troughs, sate pans, neutralizing basins and other topics. LEAD IN MODERN PLUMBING-- WHY. WHERE, HOW IT IS USED A 24 page booklet containing descriptive informa tion as well as four pages of detaiied drawings for plumbing installations id various tvpe house*. Technics) Letter No. A -----Printer* for Rail* road Structures and RoDin* Mock Technics) Letter No. 0 Red Lead Paint* for Galvanised Steel. Ru*ted, Weathered or Treated New Technics) Letter No. 10-- L.J.A. Formula 3-7, A Red Lead-Alkvd Vehicle Primer for Industrial and Marine En* irnnmeni*. Technical Letter No. 1 1 -- Recommended Surfaee Preparation of Steel for Red Lead Paints. 'c5. PORTABLE RADIATIONSHIELDING MATERIALS A special report on commercially available ahield. ing forms thst can be used to build readily as sembled. hand stacked shielding walls. Prepared by the editor* of "Nucleonics," May, 1955. LEAD Iv MODERN INDUSTRY Postpaid Mutinied. 230 page, cloth bound book all phases of the production and use id alloys sod lead compounds. LEAD WELDING An informative as well as practical guide to lead welding. Reprinted from the "Welding Handbook. Third Edition" published b' the American Welding Society. LEAD FLASHINGS IN MODERN CONSTRUC TION Lead fleshings as used in an ultramodern house in Randolph. Yt. Reprinted from "National Roofer." October. 1954. FEDERAL SPECIFICATION TT-P-H6a Paint: Red-Lead-Base, Ready-Mixed Covers four type* of red-lead-baae paint* including two fasl-drying formulatinna. .Many intended appli cations listed. PAINT GALVANIZED SURFACES? Why galvanized surfaces should be painted, 'be kind of pretrestment that should be given, aod (he correct painting systems are discussed. Reprinted from "Factory Management tod Maintenance." Kpnl. 1956. I REQUEST, THE LEAD INDUSTRIES ASSOCIATION WILL BE CLAD TO MAIL "LEAD" REGULARLY. FREE OF CHARGE. DOSE INTERESTED, AND WILL COOPERATE WITHOUT OBLIGATION IN THE SOLUTION OE YOUR LEAD PROBLEMS. ratnTgo in u. i. a. T Isaac GOLDMAN* COMflNT INC. mw roar cirr 3 I h. \\ \ L I A 2 6 0Q 8