Document 2jDjy2NzmDwORq9216n9DV9da

NIQUE in inland submarine cable coaxial conductors ever made for U operations was the completion of underwater use. a huge cable laving job for the Long The kine size of the cables pre Lines Department of the American sented some special problems for the Telephone & Telegraph Co. Crossing manufacturer. Conventional subma the Hudson River between Tarrvtown rine cable sections containing co and Nvack. N. \ .. three cables, each axial units are 1.700 to 1.800 ft. in of them 3 mi. long, were laid side by length, but tor the Hudson crossing side to form a main arterv for the the three lengths were made up in telephone company's big new line sections of which most were approxi switchins center at White Plains. mately 3.200 ft. long. Besides this, N. V. The lead-sheathed cables are the coaxial conductors in the cables the longest and the largest containing had to be spliced as thev went through the stranding machine--an operation that had never been tried before--and the splice had to be skillfully made so that there would be no bulges in the cable which would interfere with subsequent sheathina and armorina processes. It was after the stranding opera tion that lead sheathina came into the picture. The conductors in the cable are wrapped in paper insula tion. To protect this insulation from moisture an impervious membrane Already sheathed tilth lend, the table is shown here being wrapped utth wire tor armoring. Asphalt, jute and marble dust jolhnv before the cable is ready jar shipment. Lead sheathing ts iextble enough tu permit the cable to be figure eiginetl on barges, remit to be moved to the \ sack-Tarrytoun crossing. 2-- -- LIA.26044 surrounding the cable is necessary. sheathing a cable with lead is a laying. Because of the size of the o Lead is chosen because of its com unique process where the cable itself Nyack to Tarrytown cable--It is 4% parative chemical inertness which re acts as the core around which lead in. thick and weighs 261/2 lb. per ft. sults in high resistance to corrosion or lead ailov, in the case of the Hud --it was necessary to provide reels and consequent long life. This is of son cables a lead-silver alloy, is con with head diameters 3 in. greater particular importance in submarine tinuously extruded bv a screw type than the largest cable reels commonly ables w here lifting a cable for repair press to form the sheath. Over 300.- used in the cable shop. -an be a tremendous undertaking. in 000 lb. of lead were used in manu The monster manufacturing job addition to performing its primary facturing the three Hudson cables. done, the cable was figure eighted function of blocking moisture, lead Following the lead sheathing the onto barges and floated to the Hud also provides good protection from cable is armoreJ w .th vire. Lavers of son River site. There the cables were mechanical injury to the insulation. asphalt and jute are also applied as payed from the barge sterns into a Finally, lead is flexible enoush to bedding and outer covering and after specially prepared trench at the bot r facilitate reeling and paying out of a powdering of marble dust to pre tom of the river to await connecting the cable. The actual operation of vent stickiness, the cable is ready for into service. ti World's Heaviest Window is Heavily Leaded For Atomic Airplane Research HE heaviest glass windows in the Tworld, made that way with lead, the heaviest of common materials, recently were successfully cast and assembled at the Harrodsburg, Ky.. plant of the Corning Glass Works. The windows, some of which hare a rectangular dimension of 6x8 ft., are 6 ft. thick and weigh as much as 12 tons, will be used to protect from * radiation employees working on ex periments in the research and devel opment program for an atomic pow ered airplane. High quality glass of three different The heaviest picture window oi them ail. Almost as dense as <ieei. this heavd\ leaded window will permit observation while providing radia tion shielding at the A.E.C.'s engine test 'aciiitv at Idaho Falls. Idaho. densities is used in these atomic radi ation shielding windows which are made bv stacking a number of pieces of glass and assembling them in a steel frame, in order to construct these windows. Coming's research laboratory developed, at the sugges -J tion of Argonne .National Laboratory, $ a glass with a density of 3.3. which and more important in the atomic The company is furnishing all parts has very high light transmission prop held where visual observation is de for the window s under a contract which erties, and. when exposed to gamma sired while proper shielding is main Utah Construction Co. of Salt Lake ravs, is non-browning. Corning also tained. For many years high density City has for the initial portion of the developed a glass for the windows leaded glass has been used similarlv Aircraft Nuclear Propulsion facility. with a density of 6.2. one of the to observe and operate X-rav equip After their initial demonstration at densest glasses ever melted. It is six ment from a shielded position. Long Harrodsburg the windows were taken times as heavy as a comparable vol prior to these applications, of course, apart and shipped to the National ume of water, or almost as dense as lead had been used, as it continues Reactor Testing Station. There they steel. The shielding windows also con to be. to obtain resonance and bril were reassembled and placed in the tain glass with a density of 2.7. liance in fine glassware. walls of two different rooms. The em To attain these densities large Corning is manufacturing a num ployees, bv using manipulators, will amounts of lead, in the form of ber of these windows for the Atomic thus be able to perform their experi litharge, are added to the glass Energy Commission's engine test fa ments by looking through the huge batches. This use of lead, to increase cility at the National Reactor Testing windows without fear of radiation the density of glass, has become more Station west of Idaho Falls. Idaho. injury. --3-- LIA26045 i ii Railroad Barges Primed With Red Lead WICE a week for the last two Tyears the Bethlehem Steel Co. has standard by the railroads and the de mand is heavy enough to warrant been splashing an all welded barge mass production. At one end of each or scow into the waters of its Staten line the component sections are set in Island shipyard. Built for various place by cranes on a railroad track railroads and destined for freight arrangement. Step by step the sections carrying service, the vessels are. in are joined and moved along to the absolute literalness, spilled off an as- next position for specific operations. >emblv line. The barges shown on In a week a vessel has reached the these pages were part of more than final position and is readv for launch 100 built for the .New ork Central ing. As the completed barge is poised Railroad. In accordance with that for its first taste of water, it measures railroad's specifications, the steel sur 9ft ft. long. 30 ft. wide and has a faces of the vessels are primed with depth of 9 ft.. 3 in. red lead. The steel bottom and side shell of Actuallv. there are two assembly the barges are pickled steel. This is lines standing side by side at the wire brushed before the first coat of staten Island vard. The procedure is primer is applied. For these sessels made possible bv the fact that the the most obvious requirement for the barges are built to a tvpe adopted as primer is protection against the Two assembly lines, side by side at the btnten Island Shipyard of the Bethlehem meel Co., have been turning out a railroad barge or twice a week for (he uast tuo vears, ! zJZS&St;. severe condition of a marine environ ment. Red lead has success! uilv dem onstrated its ability to inhibit cor rosion under these conditions. A fur ther requirement imposed bv the assembly-line construction was quick drying. Again, the red lead formula tion meets this. Red lead formula tions are available to meet ail kinds of requirements for drving time, weight, low cost, tvpe of exposure, and-other conditions specified bv the user. The red lead primer for the New 3ork Central barges was >prav ap plied in two coats. Above the iighl load line a black finish coat viaapplied. Then, with the addition of the railroad's insignia, the barges were ready for busy service carrving everything from crated automobiles to cases of pomegranates around New \ ork and other harbors serv ed by the New \ork Central. \ number of manufacturers -upplied the red lead paints for the barges and scows. A representative formulation of the paints emploved is as follows: MARINE RED LEAD PRIMER i't <'< t PIGMENT: Red Lend .............................. ju Zinc Oxide ............................... Silicate and Sulfate.................. LW.O VEHICLE: Phenolic Varnish ................. 16 0 Linseed Oil ................................. 38.0 Thinner* and Drier................ 46.0 Pijymenx = 7!)^ Vehicle = 21 ^ Wt./Gnl. -- 22.1 lbs. x L IA 26046 Lead Fittings In Hotel And Apartment House Construction THE use of lead fittings in the re cent construction of the Hotel tions in ail the buildings' 159 bath rooms and lead shower pans are being Galvez Annex in Galveston. Tex., .installed in the 48 second bathrooms. effectively illustrates all the most im The value of lead's flexibility was ac portant advantages of lead. The num cented here in the back to back instal ber of bathrooms. 100. called for a lation of bathrooms 'where connec material fitted to prefabrication tor tions had to be made to a single rigid maximum installation efficiency; the stack from rigid, brittle fixtures in w ide dispersion of bathrooms, char two separate rooms. A double source acteristic of hotels, made demands for of potential stress was then set up, a material that would be trouble free but the lead bends will have enough and adaptable to a complicated waste give to protect the fixtures if such disposal system; and. finally, the stresses do materialize as a result of extra long-life expected from a hotel settling. required that the material have out In apartment houses water seepage standing durability. can be a worse immediate headache Lead fittings answered all three re than in manv private dwellings. In quirements. Each of the hotel's 100 either case seepage has to be pre bathrooms was fitted with a lead vented, but it may be easier to put bend, lead wastes and lead drum .rap. up with dripping into vour own cellar, The bends were revented with 2-in. as might be the case, than with the lead pipe. All of the lead work was irate downstairs neighbor who has prefabricated in the shop of plumbing had water dripping on him as he contractor R. T. Short and was fed brushed his teeth or. worse, whose onto the job at the exact time needed. expensive oriental rug has been The free flowing lead fittings as spotted. In the Graham Terrace sured a clog free waste svstem and the Apartments the architect. Frank S. flexibility of these lead fittings made Massai of Stamford. Conn., followed certain that thev could be fitted to wide practice in specifying the pro rigid connections even if there were tection of shower pans of 4-lb. sheet variations in structure. For the extra lead.. The proven impervious mem long-life the hotel had only to look to brane that a lead pan provides under lead's past record where it has been the shower floor insures that there in service in some instances for fifty, will be no damage to finished ceilings, sixty. even a hundred vears without walls or milady's wardrobe. One point failure. is to be remembered in the installa Yen' -bmilar to the requirements tion of lead safe pans. The surface of of hotel construction are those for the lead must be coated with asphal- apartment buildings. The Graham turn before pouring on cement, inortar Terrace Spartments in Greenwich. or concrete. This is to protect the lead Gorin., are l-storv garden apartments. during the curing period, after which % iped in advance, lead bends were there is no longer dfinger of cor used for water closet waste connec rosion from free lime in the cement. One of lead's greatest advantages is its adaptability to shop prefabricatton. These men prepared in advance the lead work shown with them jor the 100-bathroom Hotel Galvez Annex. The drawings of revented lead bends, above, and of lead drum traps and wastes for the bath, below, the essen. tiais of the Hotel Galvez Annex plumbing, illustrate the suitability oi lead tn a complicated installation. "SUGGESTED SPECIFICATIONS FOR CHEMICAL LABORATORY DRAINAGE SYSTEM" NOW AVAILABLE To provide a complete guide to tlie selection and installation of drainage systems in chemical laboratories, the Lead Industries Associa tion has prepared a 5-page suggested specification titled as above. Included are specifications for materials, joints and connections, hangers and supports. Specifically treated are laboratory waste and vent piping, traps, sinks, acid trays, troughs, safe pans and neutralizing basins. Additional references are to table top coverings, fume ducts and hoods. Copies may be secured, free of charge, by writing to Lead Industries As-ociation, 420 Lexington Ave., New York 17, N. Y. Lead bends, easily adjustable to construction variations, are shown be low in place for back to back bath rooms in Greenwich, Conn. LIA26047 'in-- .J"i =thrtdMi i-X 1 4< Brick And Lead linings In High Temperature Chemical Applications AS a material of chemical t\ construction, sheet lead has many advantages, not the least of which is its excellent Asbestos sheet lining in. bd joint yj in. no greater than -j in. In another vessel in one Pennsvlvania bait's oiam 15 percent sulphunr acid being processed with co. corrosion resistance and ease of installation. However, -c-- Sheet or bonded lead lining tars at 120 deg. F. The stet vessel orisinallv was line lead's inherent physical char Acid proof cement with 16-lb. lead on the wail acteristics impose tempera and 20-lb. lead on the rlooi ture limitations when it is Weld Acid proof brick The tank floor was protectei used in sheet form alone or line by a TVb-in. course of a hare when improperly supported. burned high Mica acid-re This limitation has in large sisting brick, bonded on the measure been overcome by Steel /K'/tr ~2<r-- Speciai corner sides and back w ith Penchloi bonding the lead directly to steel or copper to form a lead cladding and in this way standard / \yt/W. dished head brick Acid-Proof Cement. The lean on the wails was not pro tected in this manner. Dur combine the structural strength of steel or high heat Lap lead here, side sheet covering ing the life of this structure extending over a 13 - vear transfer of copper with the bottom sheet about 4 in. period, the lead on the wails superior corrosion resistance Detail of lead and brick lining that has been the was renewed three times. ,\o of lead. But there is still an other means of using lead answer to many proO/ems in chemical construction where both corrosion and high ternperature are ncouniered. repairs were made to the lead on the bottom of the tank. where high temperature is a problem: acid-proof brick and lead lining in inner liner or membrane separating Repairs on the side wails during this period were necessarv because of the combination. This approach is being used effectively at temperatures aver aging 450 deg. F. and. in fact, has on occasion been used with temperatures approaching the melting point of lead. 620 deg. F. Brick lining with a lead the brick from the steel of the vessel provides a temperature gradient to insulate the lead from [he high tem perature within the vessel. Corrosives ?eeping through the brick (no brick lining can be completelv impervious I peculiar corrosive action of the com bination of sulfuric acid with organic chemicals. At the end of the 13 vears. it was decided to tear the tank down and build a new one. whereupon it was found that the original 20-Ib. Suiphunc and hydrochloric adds and * hhutncted oreanics are han dled in :his hrick and lead lined is stopped by the lead and prevented from attacking and weakening the steel supporting structure. lead under the brick work on the bottom was in perfect condition and in' fact reusable. i esiei of the Pennsylvania Salt The accompanying illustration Manufacturing Co., In successful service now for 6 years. shows a 6-year old brick and lead lined steel vessel operated by the It was proven in this instance that although lead alone is not recnm Pennsylvania bait Manufacturing Co. mended for the particular tvpe .it handling sulphuric acid, chlorinated service involved, lead and brick to organics and -ome hvdrorhloric acid gether would give almost indefinite at 400 deg. F. There are two such installations: one incorporating a fgin. lead cladding and the other 12-lb. chemical sheet lead without straps. life. On the strength of past perform ance the decision was made to brick and lead line the entire replacement tank. Both have been in service for about Brick and lead linings, then. -- a 6 years. Despite the fact that the steel shell lined first with lead and tanks are protected by two 4-in. then a laver or two of acid-proof hrick courses of acid-resistant brick bonded set in suitable cemenl -- provide an with Penchlor Acid-Proof Cement other approach to corrosion problem* some corrosives do manage to pene in chemical construction. Where high trate the brick work to the lead, form temperatures, temperature changes ing insoluble salts on the lead surface and fluctuation, unusual corrosive con Once formed these salts prevent fur ditions. or high abrasion are involved, ther corrosion and protect the steel brick and lead complement each other supporting vessel from dangerous, and go hand in hand toward providing weakening effects of corrosion. a long and trouble-free life of service. 6-- -- LIA26048 v> Adhesive Lead Tape Improves Masting For Plating Operations HE addition of a pressure-sensitive Tadhesive has created new uses tor of etching due to the juxtaposition of two metals and the resulting gal lead foil and considerably improved vanic action. and expanded an important existing The success Pratt & Whitnev ex use. Developed and marketed bv the perienced with pressure-sensitive lead Minnesota Mining and Manufacturing tape masking in thoroughly satisfac Co. as another in their line of tory thieving action, in a tight seal, "' 'colch' brand tapes, the new lead in very substantial savings of time tape has provided the solution to a and labor in masking application and number of touchv problems in the in successful prevention of etching, plating of hard chronium and other led to their entire elimination of other 4r metals. type masking in chromium plating Pioneer work with the pressure- operations. The lead tape has aiso sensitive lead tape in plating was been used effectively by Pratt & Whit done by Pratt & Whitney Aircraft, ney in plating nickel, tin. copper, many of whose manufactured parts cadmium, silver and lead. And, of require plating of critical areas. Pre viously, aluminum and lead foil had been used for masking in plating operations because of their effective thieving action whereby high current course, after Pratt & Whitney's de monstration of the tape's advantages other platers were quick to follow suit. The lead tape can be applied to Quickness, tight seal, and no exces sive buildup of plated deposit, are ihe reasons why pressure-sensitive lead tape is used in masking this rear crankshajt section. densities at sharp corners are pre vented from causing excessive buildup oi" plated deposit which require con siderable hand operations for re moval. Unfortunately, however, the non-adhering foils did not always give the tight seal required of a masking any surface quickly and easily with no risk of its slipping out of position or working loose. Parts now can be masked in five minutes which for merly required as long as half an hour. The tape can be used on interior surfaces as well as exterior and on neers were looking for a dependable antenna that was light weight and low in cost. The antenna, of course, had to be an electrical conductor. The Bell people themselves conceived of the tape idea and came to Minnesota Mining and Manufacturing who gave material. Besides this the foil had to parts that could not be properiv them the lead backed tape, fulfilling be secured on exterior surfaces wi th masked easily by anv other method. all their requirements. The tape is wire wrapping, which, in addition to Outside the plating field the lead applied quickly, easily and perma the expense of time and labor, was backed tape has found an interesting nently around the inside of the bulg \ often unsatisfactory. And one other end application as the radio antenna ing plexiglas windshield of the heli undesirable factor was the possibility in Bell Aircraft helicopters. Bell engi copter. Nuclear Battery Enclosed in Lead CONTRARY to impressions that might be gained from recent Right, drawing, and. below, a photograph of the nnx nu clear hatterv which is shield- publicity, present nuclear batterieesd with lead. Unlike com ra neither are. nor are intended as. sub?titutes for the conventional lead-acid tional storage batteries, it designed for very low cur rent. high voitaee uses. borage batterv whose most familiar i use is in the automobile. Appropri ately enough, however, lead, the larg est single use of which is in storage batteries, finds an important role in the newest of storage batteries where It functions not in its usual role as electrode but in another increasingly important capacity, that of radiation shielding. The nuclear battery is a lead shielded nuclear activated stor age battery delivering a high poten tial at low current. This is just the reverse, of the customary storage bat- < Anode Polystyrene plug Monel wire Aluminum collector Polystyrene capsule Isotope Lead shield Copper tube Potting compound Cathode LI A 2 60 49 4 tcry which can deliver verv hieh cur rents at usually low voltages, most commonly 6 and 12 v. The nuclear battery measures voltage in the thou sands and current in micromicroamps. Its applications are such as the charg ing of dosimeters, the devices that measure radiation exposure, calibra tion of electrometers and hieh-meg resistors and condensers, testing of insulation, and similar specialized electrical and electronic uses where small currents are required. It has long been theorized that radioactive energy offered a potential source of electrical energy. Utilizing radioactive energy in a battery, for example, should theoretically give operating life equal to that of the half-life of whatever source of radia tion was used. Conceivably then it would be possible to construct a stor age battery that would never need recharsing and would function for as long as. say, 1100 vears, the halflife of radium. Appreciating the intriguing chal lenge to develop such a battery as well as being aware of its more prac tical aspects, the Radiation Research Corporation under the sponsorship of the Power Sources Branch of the Sig nal Corps Engineering Laboratories succeeded in producing what they term a "nuclear batterv." Using beta radiation furnished bv radioisotope strontium 90. they were able to make a batterv which would supply current up to 1000 micromicroamps with volt ages in the order of several thousand for a half-life period of 25 vears. Besides the advantage of long serv ice life, the construction of a nuclear battery is uncomplicated by liquid electrolytes and its power is packed in a small unit. Batteries constructed to date average no more than 1 cu. in. in size; about 1 in. in diameter and 1 in. high. The typical nuclear bat tery consists of a radioactive source whose emitted beta electrons are col lected by an aluminum cup as elec!ric current alter passing through a polystyrene insulator. Others are in vestigating the use of gamma radia tion as a power source in which case lead would similarly he required. About 5 oz. of lead shielding are used around the aluminum collector to reduce the external radiation be low tolerance rate. Lead was natural ly selected for this purpose because it is commonly available, it has the highest density of all common mate rials. and perhaps more significant, lead itself does not become radio active after exposure to virtually anv amount of radiation. Here the obvious advantage is that no hazard due to external radiation would ever be ex perienced w ith a nuclear batterv -- even after vears of service. THE /WLTBRARY Information Th follovinc article* and reprints eonttin information, drawini* and tpot6ration> on itir arrhiterts. rniinecn and others intere*lrd. Thr? irr available, free of rharge. earept hrrr oihrrvi LEAD JNDL'<TRIEv ASSOCIATION. 420 LEXINGTON AVENT E. NE* YORK ie of lead indicated, IT. N. V product* Helpful to upon rei|uri in the IM34 MATERIALS OF CHEMICAL CONSTRl'CTION \TU. REVIE* -- LE 4 D AND LEAD ALLOY* An up-io- iare report on new deveinomem* in the h i ird-i anil iea-1 aik-v. m rnemicat construe, iinn including re*earcn progr`*, engincmnc apP i ira linn*, and technological iDunrrmrni-. u<-n 3m.-tno.i- .11 if^'ing lining-, a-nomatic lean welding, ap-i -ir [Aiiuiion control. Reprinted from "Inon*trial am Engineering Chemistry." 0< tober. Pal. BiblmerapM . LFAD AND LEAD ALLOYS The rorro*ion resistance .,i lr*J and iis alios- a* material* of ronstruclmn in tm chemical prone*. Industrie. i. vhor lor nnrt 'han 1RR industrial e h e mi r a I . i-utnc the rifr'u id c once n t ra t ion anil teinperam rr. The riusirateq article ji*n .ferritic 'tie lArm- of Vad available lor rh'-mical construc tion an<i give recomfnen<t'--> pfac'-'c* (nr ianrira inn -i. well j ann 1 i p a i ion-. Reprinted from "I hemic*- Engineering." Frbriarv 1053. MATERIALS OF CONSTRUCTION -- LEAD \ brief <ufveT of the u*r* nf ;eaH in chemical c nn. true t inn renrinteu from 'h material* review publi-hed in ``Chemical Engineering.'' No\. 1054. LEAD LINING**-- FASTER. CHEAPER. BETTER \ report r.n a new metno.i of fastening trnpe<i lead lining- i-v the qwe ni 4 cartridge pm*crc,i -tun `truer. Reprinted from "Chemical Engineer1 nc . " Fchrua n . 1 05 J. LEAD IN MODERN CHEMICAL CONSTRUCTION AN hai vou should know about the vinous types of lead consirucnon in the cnemicai field. Reprinted from "Chemical Engineering." Jan. ]052. CONTROLLING COHROMVE AIR POLLUTANTS \ .ii-c u*-ion ol the various method* m use Tqj\ '> I'oniml rort,-*ivc air poi1111anl. Krprinieri from " Air Repair. " Mai. ]0.32. LEAD IN MODERN INDUSTRY * I .50 Postpaid \ Full' :i]u*rrated. 2.*.n oast, cloth bound book lewrrioinc ail phase* ot 'he production and use if lead, `.ail ailovs ana lead compounds. Di*ci|.. mn of th pnvsicai and chemirai properties of >a-i and us compounds is mciuded. Sufficiently technical to be of practical value to the engineer rn moustrv. vet broad enough for those "itr. a more casual interest. LEAD *ORK FOR MODERN PLUMBING SI.50 Postpaid. S1.00 per copy in quanti ties of 10 or more Proiucl\ illustrated with over 110 photocrjpli* and drawing-, this textbook presents cicarls to ;npiumhing stncienr the necessary tool*, procedure* and the metnob* required for lead work. Each open ation i* given in aiep-bv-xtip photographic *<-qn* ne fulls cornplemcnteri bv a detailed e\pinnymrs u\i. Pocket nze.i with plastic ring binder. LEAD IN MODERN PLUMBING-- A'HY. * HERE. HO* IT }> USED A -l page booklet containing descriptive informa tion a* well a* four page* of detailed drawing* for plumbing installations 'n vartma* Vvpe bouse* FEDERAL SPECIFICATION, WW.p.325 For Pipe, Bend* and Trap*. LEAD Pun v nf Section IN' of the rbderai Standards "lock Catling. i.ui.lished Lv the Government Print, ng Office. CALKING LEAD Comnterrul Standard CS94-41 Promulgated hv the National Bureau of Staodaids. LEAD *'ELDING An informative as well a* practical guide to lead welding. Reprinted from the "*'eldinf Handbook, Third Edition" published by the American TTelding Societ'. RED LEAD TECHNICAL LETTER' A series of lecnntr.ii ct'er* oniaitnng reo >0*.: r-jiin turmuiation* `-vifc bv ;he R- Lead Divi sion ii-rt'i 1 n-11 - tr 1 -* A--....... . Available sep- Technical Leitrr No. 3^--Red Lead Primer* (or Atmospheric Exposure Technical Letter A o. 5 -- Red Lead-VinO and Coumarone Tvpc Paint* Technical Letter No. h -- Red Lead Paint Formulation* Technical Letter No 7 ----Paint for Hvdraulie Mruriure* Technical Letter No, H---- Primer* for Rail- ro.id 'trurture* and Rolling 'lock Technical Letter No. `i--Red Lead Paint* for Galvanised 'teel. Ruted. leathered or Treat ed Nrs FEDERAL SPECIFICATION TT-P-Mf.a Patnr: Red-Lead-ll;ie. Headr-Mixed MKTAL PROTECTIVE RED LEND PAINT*The 'cisiiuiiiv >>i rc ; lean n ; jr primers 10 meet a mr range nf .urfd<-c n,iitions. drying *r nc. i ,1 ie. and rmrinniir .i~'*Mno. .. je.rnhrd. Rcr 1 n te " Irorn "Pnin .,nu Narni-i. 11 rn. I ur 1 ic.n. J jnn 1 r v IM.51. NN IN \ E' f II. V PIO N Of PRIMER' HlR MARINE ATMOSPHERIC ENVIRONMENT'S re<i 1*-h j rinse,i i.ignieni mmer* m>'r :.n exposure periiHi of three dn-i one njlf <e.i:, m d ngorou* rriAnnc aimophere Reprinted from "fiffiri8i Difesi" published bv The Fr-u-raimn of Paint ana Varnish Pmdurtmn Club* THE U>E OF LEAD IN THE. PULP AND PAPER INDUs,TRY Reprinted from "Paper Trade Journai." Oct 26. 'n5`'- UPON REQUENT, THE LEAD INDUSTRIE* ASSOCIATION '1LL BF GLAD TO MAIL "LEAD'' REGULARLY. FREE OF CHARGE in TIIO*E INTEREpTEU. AND *!LL COOPERATE WITHOUT OBLIGATION IN THE SOLUTION OF YOUR LEAD PRORI.EMS rfUMLI. IV ! . J. *. ar !**c c o l d ms v n cowr*'T vgtr torn c it y LI A2605G