Document 6Bmdavznrg18bDm45aQqjKjp1

N 1179 SAN FRANCISCO'S SUBWAY SYSTEM BUILT TO LAST Reliability has dictated to the design ers and constructors of the San Fran cisco Bay Area Rapid Transit System i BART ) that every effort be made to build a system that will last for gen erations. Lead has proved to be a metal of multiple uses, involving various aspects of BART's construc tion, and has contributed signifi cantly to these objectives. Underground lead sheathed cable was used to insure power reliability for the BART system. Lead performs two other vital functions that will help insure a long life for this costly venture. Miles of lead calking are used in various areas of the system to waterproof the tunnels, and lead platinum anodes are used to protect against corrosion the underwater steel shells that make up the 3.6 mile BART Trans-Bay Tube. Cathodic protection through im pressed current has been demon strated to be the most economical method of protecting underwater steel structures from the wearing effects of corrosion. The system at BART consists of 16 lead platinum anode platforms strategically placed at various points along the sectioned tube to insure full protection for the entire length of the steel structure. The platforms consist of a 30-ft. long, 5-ft. deep creosoted wood base, concrete ballasted, on which is fixed the 30-ft. long, 3-in. lead platinum anode. Every 5 inches along the 30-ft. length of the anode is a darning needle sized platinum pin. The plati num increases the efficiency of the anode by acting as a catalyst and also extends the lead's life. Inside each of the 16 tube sections to which anodes have been attached is a 24-volt DC rectifier that feeds positive current to the anode. The anode in turn returns the current back to the tube, making it neutral, thereby cancelling out the local cor rosion currents that occur on a steel plate immersed in sea water. Fourteen of the sixteen anode plat forms rest on the bottom surface of the Bay. The other two have been im bedded 20-ft. below the surface to accommodate a deep ship channel. The anticipated life of each anode is five years. In areas along the BART line where steel sections used to construct the tunnels are bolted together--specifically downtown Berkeley, Oak land, and San Francisco--betweenplate sections have been calked with a specially designed lead calking strip. Once again, lead was selected because of its effectiveness as a per manent waterproofing seal and be cause of its excellent corrosion re sistance which insures long life. The calking strip was a wedgeshaped extrusion :i4-in. deep, hi-in. wide at the top and 3le-in. wide at the bottom. Miles of tunnel area within the BART System are water proofed with a special design lead calking strip. Workmen applying the wedge-shaped extrusion calking strip. A 'ea d-p: 3: "-n jrcc? pi3tfcrrr' 'escv fc- ns!.v 3* : ~ ji:er toe 5 3 >. 'he a n c c e s protect the stee1 tunne s n e `' i from corrcsicn 2 LIA26570 The Zn-75 LEAD AND ZINC LOOK TO THE FUTURE The Zn-75, a sleek, beautiful Miura prototype sports car, is literally a rollins laboratory of lead and zinc design ideas. This one-of-a-kind au tomobile was produced in 1969 un der the auspices of the International Lead Zinc Research Organization. Styled bv famed \uccio Bertone, head of the auto body firm of Carrozzeria Nuccio Bertone of Turin. Italy, and manufactured bv Automobile Ferruccio Lamborghini, Sant Agata, Bolognese. Italy, producers of worldfamed Grand Turismo autos, the Zn75 made its debut in August, 1969, in Detroit. While the major emphasis is on zinc, the \erv latest developments and advances in lead are found on the Zn-75. Several of the lead appli cations could start a trend in auto motive design. Malleable, easily-cut, and available in almost any desired thickness, lead sheet has been used on the Zn-75 as both a sound barrier and for vibra tion control. A lead sheet and poly urethane foam composite has been used as a floor underlay to muffle engine and road noises. The com posite consists of a 14-in.-thick foamlead-foam structure, using 1-lb. (ap proximately /u4-in. thick) lead sheet. Leaded vinvl sheet has been in stalled in the door panels of the Zn- 75 to damp vibration. The lead is dispersed in the vinyl sheet, which is liu-in. thick and weighs 0.87 lb. per sq. ft. An important and not totally unexpected bonus effect of this in stallation is to give the doors a good solid feel and a sound when being opened and closed that clearly de notes quality. Terne, a lead tin alloy coated steel, has for years been used for automo tive fuel tanks, oil and air filters, truck air cleaners, car heaters, gas kets, valve covers, and other automo tive parts. Durability, ease of form ing and drawing, ease of soldering and corrosion resistance are just a few of the particular characteristics of terne that make it desirable for automotive applications. Dispersion strengthened lead, a w rought product consisting of 99.9c,c pure lead strengthened by an ex tremely fine, uniform dispersion of lead oxide particles, is available in a multiplicity of shapes and forms. It is used on the Zn-75 for the fuel line. The Zn-75 burst cn the , 1969. !t .nccrpc-ates a:i anc1 z-Hc 2'jta^c' The fuel line tubing is 86.6-in. long, has an OD of ,4-in. and a wall thick ness of .010-in. Lead's natural quality of lubricity and softness make it a leading mate rial for automotive bearings. A newly developed material consisting of a sintered ferrous skeleton impregnated with lead was used in the manufac ture of the connecting rod bearings on the Zn-75. The porcelain portion of the spark plugs in the Zn-75. as are all auto motive spark plugs, are lead glazed. And the car makes use of both a paint primer consisting of a basic lead silico-chromate and 8511 basic lead sili cate as well as an external coating of a green, lead pearlescent paint, often used in various colors as a cu?tom finish for luxury automobiles. Lead solder, the 12-volt lead acid battery, and the premium gasoline containing tetraethyl lead t'TEL! wrap up lead's contribution to the Zn-75--tomorrow's look in automo bile engineering and design. L 17 2 k 5 71 TESTS AND EXPERIENCE PROVE... 4 LI/-26572 The applications of lead in com). I n rt.si;tant environments are too numerous to list. Most particularly. methods and materials for lining stor age vessels have been given intensiie studv. As new materials become avail sheets. One sheet acted as the bottom and two ends, the other two made up the sides. These sheets were llllUever. lead plays its role in the able. they are tried for lining tanks formed over a wood frame that dupli In-mica! processing industry where and other vessels to contain the acid. cated the inside dimensions of the , .,.,.minalv endless list of corrosive For sulphuric acid service, however, concrete tanks. The lead was clamped als must he handled or stored tank lining is a job best entrusted to to the frame and the whole assembly ,,,,,,,nically and over long periods lead because of its proven perfor Inverted and lowered into the tanks. time without jeopardy to the mance and low corrosion rate. The top edges of the sheet lead were eMnipnient. Notable among these Lead for use in lining vessels con then secured to the top of the tanks , hemirals because of its extensive taining sulphuric acid concentrations and the form removed. The seams in is sulphuric acid. Lead is virtu- ranging from 5% to 50', has a cor the sheets were then closed by lead ull\ a must in maintaining sulphuric rosion rate of less than 5 mpv (mils burning (welding). In addition to ,c id \ essels. in ]%8. ,-uiphuric acid production per vearl. Corrosion rates for con centrations above 50% are shown on the tanks, lead was also used for coils, sumps, launders and some pip in the Inited States reached 56.8 the following curve: ing. [dlljon pounds ... in dollars, well Lead is also being used to protect % ,ut S500 million. And industry high output plating machine tanks at I ctowlh eontinues at a healthv rate according to current U. S. Depart ment of Commerce reports. Albert's Plating Works in Brooklyn. One of the largest, fully automatic machines for job shop plating, this Metalworking firms make use of machine is currently used to plate .ulphuric acid for such operations as copper-nickel-chromium or a nickel- pickling, plating, anodizing and other chromium finish on tubular steel fur processes. In agriculture, the acid is niture parts. The machine has an used in the manufacture of fertilizers. hourly production rate of between One of the largest users of sulphuric 500 and 1250 parts. acid i.- the chemical industry itself. Corrosion cf 'ead by s.ipbur c j C-c Lead lined tanks contain the cor Here, last quantities are used in the 3s a funct-cn of rosive acids used in the process. One manufacture of such evervdav items of these is an acid pickling tank that as synthetic fibers and detergents as Recently. Phelps Dodge Refining uses a 10% solution of sulphuric acid well as a host of other important Corporation increased the capacity of at room temperature. Five other lead household and industrial chemicals. its El Paso copper works by 33%. lined tanks are used to rinse acid Because of sulphuric acid's wide The electrolytic tanks in the original or electrolyte solutions from the parts. spread use and high corrosivity, the facility had been lead lined and had One of these operates at 180% and given good service. However, Phelps the others at room temperature. An ' ' . -v " ~ a 5 :rr;r-an burning . c- a. e a -- > : n : r e 1a n k end. Dodge engineers still investigated dif ferent types of materials for possible eighth tank is used in chromium plat ing service. The electrolyte is a com use in lining the new electrolytic bination of sulphuric and chromic tanks. acids. Tests of the new- materials were The lead in these tanks has given conducted under actual operating excellent service, not having been re conditions. This meant that the mate fined from the installation of the ma rials would have to stand up in a chine in 1954 until early 1969, a 15 sulphuric acid, copper sulphate elec year period. trolyse at a temperature of 150F. Materials utilized in the experiment included built-up and pre-cast glass fiber, polyvinyl chloride and other Antimonial ;ead co<is are used to o p =: the plating bath They transfer hear veil and resist corrosive effects cf the acid. plastic materials. After a complete and detailed as sessment of the results, Phelps Dodge engineers found lead to be the most durable and economical to use in this specific service. The new facility was completed and went on stream in De cember 1968. The tanks to be lined were made from concrete. The lead linings for these tanks were made from three LIA26573 Springs Mills is not in the electrical business. The company is importantly in the textile business as the manu facturers of Springmaid, Pequot, and Morgan-Jones products; and as such depends on reliable electrical power to maintain maximum operat ing efficiency. Paper-insulated, lead sheathed cable provides the reliabil ity. Lead cable sheathing is flexible, completely impermeable to moisture, corrosion resistant, chemically stable and available in almost unlimited lengths. At Springs Mills' Fort Mill, South Carolina plant a 13.8 Kv distribution system using lead cable has been in use for more than 20 years. The im portance of power reliability is dra matically illustrated by the fact that a single 2,000 Kva substation maysupply power to as many as 1,500 looms. In recent years a series of new in stallations of paper-insulated lead sheathed cable have been added to the complex of buildings and plants at Fort Mill to meet the need for in creased production facilities. Just within the past five years power sources have been increased by the installation of more than 150,000 Kva transformer capacity which is served by lead sheathed cable. The cable's reliability was proved subsequently when air conditioning was added to the plant. The air flow between areas at slightly different temperatures and pressures through cable ducts connecting them, created condensation moisture problems that presented no problem whatsoever to the lead sheathed cable. Underground installation of cable in ducts at the mill use a specific cable design normally used in un grounded applications. ^ hen in stalled. the lead shield, as a neutral, is actually resistance-grounded which gives an added safety factor at only 2-3M higher cost. here it is necessary to run distri bution cable in aerial trays, the same shielded conductor and paper insula tion is specified but instead of the polyethylene covering, the lead is wrapped with jute and protected with galvanized armor. P2Der 'r.suiated she-:"-: ; : e - :ne cortmoing operation of the noge locp-s^a: Sp ' V. --V LEAD SHEATHED CABLE HELPS WEAVE POWER RELIABILITY AT SPRINGS MILLS i 6 Llh2 LEAD GIVES A LIFT TO ART Lead is generally recognized as a material with a vast number of utili tarian applications. It is also known to artists and architects as a medium of unusual flexibility and enduring beauty for sculpture, and other uses that serve to "pleasure the eye." "Lead is a beautiful material," savs Arthur F. Geisert, sculptor and art instructor at Concordia Teachers Col lege, River Forest. Illinois. Matching action to word. Mr. Geisert has made extensive use of sheet lead for relief sculpture and encouraged other ar tists to follow suit bv writing on the ease with which it can be used and the "how to" of working with the material. Starting from the point-of-view that lead relief sculpture has a dig nity that cannot be achieved with any other metal. Mr. Geisert spells out the unusual advantages available to the sculptor in using lead. The ma terial is inexpensive compared to other metals that might be used. Sheet lead is soft, easily hammered and punched and yet under normal handling maintains its shape. The metal is w orked cold and requires no annealing. The equipment necessary for working the lead is minimal--a small selection of hammers and punches suffice. Lead's well-known enduring quali ties make it a natural for outdoor as well as indoor sculpture The aging process graces it with f. patina that adds rather than detrr.cts from the metal's soft gray loveliness. And un like other metals used for sculpture, lead w ill not stain stone, masonry or marble--the most likely surrounding environment for artworks of this kind. Notable examples of artworks made of lead, from antiquity to the present dav, abound. So do humbler works of art such as the lovely garden sculptures and fountains made of lead for which the world is indebted to the English. Lead persists as a highly desirable art material right up to today with such examples as Mr. Geisert's re lief sculptures and Maillol's exqui site "The River" in the garden of Mew York's Museum of Modern Art. LIA26575 NEW SOLDERING TECHNIQUES SPEED PRODUCTION AT GENERAL MOTORS Automatic soldering procedures in troduced into manufacture of fuel tanks at General Motors' Oldsmobile plant in Lansing have made a major contribution to the 3.000-tank per day production requirement of the plant. The same is true at the AC Spark Plug Division plant in Flint where gasoline tank metering devices are manufactured for installation within the fuel tanks. Filler necks, vents and gas lines are all soldered to the gasoline tanks. The tiller neck soldering technique, a new one. was designed to prevent sheer in event of a collision. A filler neck is soldered automatically to a tank everv 30 seconds at the Oidsmobile plant. The tank comes into position on the assembly line; 35/65 tin-lead allov solder wire from coil stock is machine-fed into place along with liquid flux; air torches using natural gas and compressed air heat the joint and melt the solder. The gasoline tank vents are sol dered automatically as well but with a different composition solder. Here a 0.156" diameter solder wire, flux cored, is used. Production flow is consistent with the filler neck sol dering operation. The fuel level sensing device subassemblies (called sending units) made by the AC Spark Plug Division in Flint are equally dependent on automated soldering techniques for production efficiency. These sending units are inserted within the fuel tank and provide the means by which fuel capacity is registered on the automobile instrument panel. The assembly consists of a fuel tube cover plate and float arrangement to which a potentiometer type sending unit is attached. Critical to the man ufacturing operation is providing a perfect seal betw'een the tube and the cover plate. Soldering with a paste consisting of 50/50 tin-lead alloy in a glvcol vehicle with ammonium chloride as a fluxing agent is the solution. Automatic rotary type soldering machines are used for the tank units. Designed and built by the Dhision's manufacturing engineering develop ment department, the machines have the capabilitv of two complete solder ing operations. Each machine holds 36 units and the various soldering phases--dispensing, pre-heating, sol dering. cooling, cleaning and drying --are performed on two parts simul taneously. Essential to the high-speed solder ing techniques at both plants is the use of corrosion-resistant commercial terne. a lead-tin allov coated steel that solders easily because the terne alloy itself is a solder. Speed of pro duction and reliability of product characterize fuel tank manufacturing operations at General Motors. 8 ilA 26 576 BATTERY POWER LOWERS PRODUCTION COSTS AT HANNA'S ROSE VALLEY MINE nium the pt.u real mines can claim an estiJt,.j JIUJ13 per ton replacement and maintenance cost for its all-impor:ilU .;i|)|ilv and personnel haulage equipment. Vet, that is the perfor mance record. Jesse L. Shepperd. i.mieral Manager of Underground Mines for Hanna Coal Company, Diij-ion of Consolidation Coal Com pany, predicts for the company's 7,tHK) tpd Rose Valley mine in east central Ohio. The reason for the amazingly low eo-ts: battery power. Today's lead acid battery-powered equipment, desisrned t" perform the necessary suppit and personnel haulage chores in a real mine, helps to lower produc tion costs substantially. The equip ment not only requires less mainte nance than other types of equipment biit ali-o requires less labor. Another Munificant sacing in the use of bat tery-powered equipment is that it iasts substantially longer than the in ternal combustion equipment that it replaces. The company's selection of equip ment that would perform the han dling and distribution functions most economically and efficiently resulted in the purchase of. among other equipment, five lead acid batterypowered tractors i 16,000-lb. capac ity i. three battery-powered personnel carriers, ten battery-powered golf cars for personnel movement, a bat tery-operated front-end loader, spare batteries for the equipment, and a battery charging station. Minor equipment repairs are per formed bv operators and helpers on the section and supervised by the sec tion foreman. Breakdowns of a more major nature calling for a trained mechanic bring the mine's personnel carriers and golf cars into plav. The battery-powered equipment permits the necessary personnel to travel quickly and directly to a breakdown with all necessary tools and supplies for the repair. The personnel carrier is capable of pulling a small trailer in which a welder and a set of cut ting equipment is carried. It is also used to carry the hea\ier supply parts. Hanna is very careful to protect its investment in equipment by demand ing: proper battery maintenance. The extra set of batteries for each piece of equipment enables them to substi tute a fully-charged battery for the partially discharged one at the end of each shift of operation, or sooner if the equipment has been worked unusually hard. The change takes minutes since the mine has a properK constructed charging station that in cludes an electric crane to facilitate changin'!. Mr. Shepperd reports that in ad dition to the low maintenance cost, the trackless equipment has reduced downtime and increased efficiency. Sering units, ion's elop- have olderholds ering , solIrving simul- olderis the nercial steel terne of proroduct during L1A26577 THE LEAD AND FOAM SANDWICH ... A NEW DEVELOPMENT IN NOISE SUPPRESSION Thin sheet lead has earned wide spread recognition as an eflicient. economical, and easily installed sound insulation material by architects, con tractors. acoustical engineers and others in the building and construc tion industry. Now design engineers are turning to lead with increasing frequence because of the development of new materials incorporating lead that can effectively reduce noise in machinery enclosures. One such material now available is the composite or sandwich of thin sheet lead and polyurethane foam which both absorbs sound and pre vents its transmission to the outside when used in machinerv enclosures. Transmission loss provided by this material exceeds that expected from the Mass Law. yet adds only a mini mum of weight to the structure being soundproofed. The sandwich consists of 1-lb. sheet lead between two layers of \" thick polvurethane foam. This can be applied to the inner wall of a machinerv enclosure with any good commercial adhesive. The thin sheet lead septum provides sound insula- tion while the adhered layer of foam prov ides sound absorption. The mate rial is available with as many as four sheets of lead separated by foam, de pending on the amount of sound in sulation required. In testing the ef fectiveness of the material, it was found that a thick sandwich ad hered to 20-gage steel, with the lead weighing onlv 10 oz. per square foot, provided a transmission loss equiva lent to a 30 lb. per square foot con crete wall. An interesting use of the material is exemplified in a shipboard engine generator installation. During the dav the generator presents few noise problems since propulsion engines are operating, people are up and around and shipboard activity is at its peak. At night when the water is quiet and people are asleep, the automatic start up and shut down of the gen erator could be extremely annexing. When the lead and polvurethane foam sandwich material was placed com- pletelv around the generator com partment. the noise became unnotice- able. an obvious boon to boating. Application? lor the lead and polv urethane sandwich material which are presentlv being studied include outboard motors, photocopy ma chines. data processing equipment, heavy duty compressors, machine tools and architectural installations. Areas for noise control that look promising are in the field of ma chinery for road building and heavv cunstruction. Equipment such as jackhammers and portable air com pressors are particularly in need of noise suppression. The key to lead's growing popu larity in sound control systems is found in the material's unique physi cal properties. Inherently dense, limp and impermeable, lead sheet is the one material which most closely ap proaches the "ideal" as a sound bar rier. In addition, lead sheet is ex tremely easy to work: it can be cut to shape with the most simple tools and can be molded, folded, creased or crimped to provide an air-andsound-tight seal around virtually anv obstacle. or to fit anv enclosure sys tem. In our pollution conscious world lead foam sandwich plays its role. INI AN BAT IS 5 \n cv pon cl < cent I \ press quiet i in the neighh trie K\ in field blew sj by six. The un eontrai of Lim project ation, 1 tion Co A lead-foam sandwich enclosure reduced the no1 se ievei 35 CD cn this "Whisper-Vac" den tal evacuation system. 10 L 1426578 CHy ADI NE\ Use i the c have your you w addec list fc int er est ing o dds and ends about l ead FAIL-SAFE HANDLING OF RADIOACTIVE MEDICATIONS BATTERY TRACTOR IS SHAPING UP! GET A LONGER DRIVE WITH THE AID OF LEAD yn experimental lead acid battery powered lawn and garden tractor re1,,ntiv was shown to the engineering press in Chicago. The tractor is so quiet in operation it can be run early in the morning without awakening neiahhors. Known as the EXT (Elec tric Experimental Tractor), the unit in field tests effectively mowed grass, blew snow and plowed. It is powered hv six. htgh-density 6-volt batteries. The unit was built under a research contract by Aircraft Dynamics Corp. of Lima. Ohio. Joint sponsors to the project were Lead Industries Associ ation, Inc., and the Farm Electrifica tion Council. Nuclear Associates, Inc., Westbury. New York, specialists in the design and manufacture of lead radiation shielding and storage equipment, has developed a new series of Gamma Vue Shields which enable person nel to view the radioactive contents of lead-shielded containers while handling and dispensing them with complete safety. Whatever the con tents of the package, radioactive med icine, syringe, vial, etc., it can be in serted in the new container and stored there prior to dose administra tion. Complete protection results from the use of lead for the shielding con tainer. as well as a high density leadglass window. Lead is playing a more and more sig nificant role in golfing. Lead acid battery-powered golf cars take you to the tee. Now a special lead-weighted golf glove is said to improve your drives and correct slicing and hook ing after a little practice. The glove, distributed bv Alex ander Sales Corporation. Mt. Vernon. New York, is a fine leather golf glove scientifically weighted with 8-ounces of lead. Three bars inserted in indi vidual pockets tailored in the back of the hand portion of the glove are the secret to its success in improving one`s golfing prowess. I. sing one. two or three of weights can add 75 yards to vour drive, cor rect slicing or hooking, add distance as well. FL Lead Industries Association, Inc. T CHANGE OF ADDRESS OR NEW READER Use this side of the coupon if you have recently changed your address or if you would like to be added to the mailing list for LEAD FOR CHANGE OF ADDRESS PLEASE WRITE IN NUMBER FROM TOP OF ADDRESS OR ATTACH OLD LABEL H ADD ME TO YOUR MAILING LIST (please check one) V ATTACH MAILING LABEL HERE To_____________ Name, Title _________A__________ Company Street City, state, zip code PLEASE CHECK INTEREST Painting Health & Safety Architectural & Building Design & Radiation Engineers Q Ceramics Chemical Engrs. Battery Power Miscellaneous (please specify) L I A 26579 NEW LISTINGS Lead applications for building and construction Reprint of article from Progressive Archi tecture reviewing the latest developments m the use of lead in architecture and construction. Twelve pages. A-10 ARCHITECTURAL Lead armor soundproofs new arts center Chicago's new Center for the Performing Arts is sheathed entirely in lead. A gen eral description is given of the job and how the lead was handled. Four pages, illustrated. A-7. The effects of waste line effluents on synthetic rubber gaskets for cast iron soilpipe Synthetic rubber of a type similar to that used as gaskets in waste line joints was exposed to many effluents found in the plumbing waste system. Twelve pages, charts, tables and illustrations. D*5 CERAMICS Microstructures and Magnetic Properties of Lead Ferrites Investigation of isotropic high lead ferrites shows they can be prepared with energy products greater than 1.4 x 10'; G Oe. Eight page reprint. B-9 CABLE SHEATHING Lead sheathing for power cable Design guide for use of lead sheathed power cab'e. Factors governing cable se lection are also reviewed. Twenty-four pages, illustrated. C*1 PLUMBING Will calked lead joints withstand high temperatures? Describes tests on uncoated cast iron soil pipe with lead and oakum joints. Such joints were found to withstand temperatutes to 170 F without leakage. Four pag-is, reprint. D-4 ANODES FOR CATHODIC PROTECTION Lead-silver alloy anodes in cathodic protection of ships Operating efficiency and behavior of leadsilver anodes for corrosion protection of ships. Other anodes are compared. Details of operation, costs and other important factors are discussed. Eight page reprint, tables and illustrations. E-l PAINTS Red lead based paint systems Technical booklet lists properties and ap plications for twenty-four red lead paint systems. Specific uses, e g. fresh water, marine, etc. suggested for a wide variety of formulations. Preparation of surfaces discussed m detail Thirty-two pages, charts. F*1 ANTI-VIBRATION PADS Ways to reduce press vibration Two installations of lead asbestos pads to reduce heavy machinery vibrations. Sec tional drawings and loading*: are given. Two pages, illustrated. G*1 CHEMICAL CONSTRUCTION & CORROSION PROTECTION Lead in modern chemical construction Reprint from Encyclopedia of Chemical Process Equipment. Describes installation, proper design application, and testing of lead linings. Twelve pages, illustrated. H*1 SOLDERING AND WELDING Soldering alloys Describes numerous alloys used as solders and discusses advantages and drawbacks of many. Flux requirements for soldering most metals, both ferrous and non-ferrous are listed. Four pages, tables and charts. 1-3 SOUND BARRIERS Practical application of sheet lead for sound barriers Twelve page manual gives specific wan construction and performances. Tables, charts and illustrations. J-l BATTERIES Lift trucks: Accent on muscle, and talent too Report discusses latest developments m the lift truck field together with future forecasts. Contains concise details on the economy of electrics. L*8 Industrial truck cost calculator Three nomographs permit estimation of costs for gas vs. battery powered indus trial trucks in two or three minutes. Twelve pages, charts and tables. L-l GENERAL The U.S. Lead Industry--1968 An annual review of activity within the in dustry that contains a general summary for the year and a senes of charts and tables giving current statistics on lead production and consumption. M*14 Publications and films This booklet lists all the material currently available from Lead Industries Associa tion, Inc. Sixteen pages. M-13 Primary lead production areas in the U.S. For schools, libraries. 11 "x 14" map show ing locations in U.S. of most lead smelters and refineries, and lead mines. M-ll This magazine is reproduced from lead type NAME____ TITLE _____ PLEASE SEND ME THE PUBLICATIONS MARKED BELOW WRITE IN CODE NO. I I COMPANY ADDRESS CITY ___ <-TO REQUEST LITE MAIL TO: LEAD INDUSTRI ASSN. INC. 292 MADISON A NEW YORK, N.Y. STATE IIP