Document 6RzbOw9Y3dM53ogQq1Bqr10y3

N 1162 FLEXIBLE LEAD PLUMBING MEETS RIGID REQUIREMENTS The biggest building of its kind in the country is the new Tulsa Exposi tion Center in Tulsa. Oklahoma. Its huge spans leap across 400 feet of unobstructed space and its 1,200 foot length results in a total floor area of more than ten acres. It was com pleted in time for the International Petroleum Exposition in May. In Tulsa thus is known, more simply, as "The Oil Show". The real "Oil Show" started back in 1859 in Titusville, Pennsylvania when Colonel Drake brought in the first oil well drilled. This was the daddy of them all. Colonel Drake needed 69 feet of pipe to reach the rich oil deposit he was seeking. To day twenty times that amount of pipe is used just for soil and waste drain age in the present showcase for the oil industry. In the seven, almost tvpical, toilet rooms (two of which are illustrated in the accompanying photograph! there are 276 plumbing fixtures all with flexible lead waste connections. There are fifteen 6 inch vent stacks through the roof, each with 4 pound sheet lead flashings having 12 inch high boots dressed down into the top of the vent one inch and lead base sheets. All 114 water closets are con nected to the drainage system with 4 inch x.h. lead bends. The remainder of the lead piping used is in connec tion with lavatory and urinal waste connections and pipe branches, not to mention 4.500 pounds of lead for calked joints. Although the Tulsa plumbing code permits rigid drainage svstems in fireproof buildings, flexible lead and soil construction is favored bv most architects and engineers in the Tulsa area as well as by the Plumbing and Mechanical Contractors Association and the local Journeyman's organiza tion. David Graham and Associate; were the architects and mechanical engineers and the plumbing was done by the Easley Plumbing and Heating Company, both of Tulsa. The build ing will become a part of the Tulsa State Fair Properties. Overall view showing structural system used. L 1426461 KEEP YOUR POWER DRY When the American Electric Power System recently centralized under one roof a power control network for seven states, that roof had to be a good one. The roof is actually a sheet lead membrane waterproofing under a terrace a foot or two above grade on AEP's new building downtown in Canton, Ohio. The control system, housed in a partly-below-grade structure, is a Detail section through pool end plant box computer which conducts a minuteby-minute check on the vast network of power stations operated by the AEP System. It is linked by the sys tem's own 1,700-mile microwave communication network wfith auto matic electronic equipment installed in the power plants, thus providing a constant "reading" of power flowover the entire System. The waterproofing was accom 10" x galv. 0t if! S<|M plished with approximately 4,000 square feet of %s inch thick (6 lb.) antimonial lead used as an underlayment for the entire plaza area. All sheet lead was lapped a minimum of one inch and joints were burned. The lead, placed directly on the structural slab, was protected under neath by a laver of 30-lb. asphalt im pregnated felt. The top surface, over which concrete fill and various finishes were placed, received a heavy brush coat of a bituminous coating compound. In both cases this was protection against the hazard of freshly placed concrete. Concrete, cement, grout and similar materials contain free lime. Until the lime car bonates (in other words, until the concrete "cures") it can corrode the lead as it will other metals as well. The plaza thus formed serves as a landscaped terrace offering a pleas ant stopping place in the midst of the city. Set some thirty inches above the level of the surrounding streets, it offers a varied cityscape of plant boxes and grass plots with a tiled fountain surrounded by terrazzo walkways. Sculptural pierced walls on two sides and imaginative lighting create a constantly changing visual effect which is an ornament of the city and a credit to the company which gave it form. LI A?6462 High schools, like the boys and girls they serve, have a habit of growing. Sooner or later, enrollment reaches or even passes the number of students the building was designed to accommodate. Then a number of things may happen--most of them less than an educator might desire. One case in point has been over crowding of gvmnasium space. A normal size class of youngsters let ting off steam in a gvm sets up a sizable amount of noise. But when more than a normal number--per haps classes of two age groups, or boys and girls--must share a gym, the noise becomes a real problem. In some schools, an attempt has been made to partition the gymnasium space by hanging canvas curtains. These afford some visual screening but do not block noise. The new Harvey S. Firestone High School in Akron. Ohio, is a long way from being overcrowded. Its student body of 1.230 is well within the num ber it was designed to serve. If it does become crowded at some future date, though, the problem in the gym nasium will not arise. A leaded vinyl curtain may be raised or lowered in the gym to provide real acoustic privacv for separate classes. The gvm measures 104 x 107 feet with bleachers 40 feet deep surround ing it on three sides. This is large enough to accommodate two basket ball courts, side by side. The main curtain crosses the nar row dimension of the gym at the cen ter, splitting it into two areas each 52 x 107 feet. Secondarv curtains, riding on over head tracks like draperies, can be used to close off all or any of the four sections of bleachers along long walls of the gym. The main curtain consists of two independently controlled leaves sepa rated bv a 12 inch air space. Either or both of these can be raised or lowered electrically. All of the curtain material is leaded vinyl coated on durable fabric back ing. Thus it is impervious to air flow and, with a weight of about 0.4 pounds per square foot, has suf ficient mass to block sound. The finished side of the curtain is tur quoise with an embossed pattern. Currently the curtain comes into use two evenings a week when the gym is split for separate activities in the adult education program. Vi hen the school reaches capacity enroll ment it will be used every day. At that time it will enable physical edu cation teachers to follow a normal course program. In cases where the canvas curtain was employed, they had to schedule both sections of the gym for the same activity. As one teacher put it. `Tt's iust impossible to try to teach skills--a wrestling class, for example--when another group is playing volleyball on the other side of a canvas curtain. ' The curtain arrangement was in stalled by Jansen Industries, Canton, Ohio according to the plans of archi tect. Josepih Tuchman. Tuchinan & Canute. 88 S. Portage Path, Akron, Ohio. The material itself is made bv The Duracote Corp. of Ravenna. Ohio. W hile the installation of this 4600 square feet of double curtain cost $18,000, it provides, in effect, a second gymnasium--a terrific bar gain for the community at this figure. Curtains of the same material hanging like draperies et the ends of the bleacher cen be used to close off that sound path. LIA26463 Spans The Continent A unique type of lead sheathed communication cable as thick as a man's arm has made its debut as a superhighway for transmitting tele phone calls, TV and other communi cations within the country. The modern new cable, designed by Bell Telephone Laboratories and pro duced by Western Electric Company's Baltimore and Hawthorne Works for use by Bell Operating Companies is known officially as Coax 20. It can carry as many as 18,740 telephone calls using existing carrier equip ment or about 32.400 with a new car- The neatly bundled core of coaxial cable moving toward the paper wrapping section of the cable stranding machine. Lead sheathing is extruded onto this core after wrapping. rier system now under development. A predecessor of Coax 20 was pre viously described in Le a d .* As its name suggests, Coax 20 is mainly composed of 20 coaxial lines plus a number of regular wires for monitoring alarm, telemetry and test circuits. A coaxial line, which can carry more signals than a wire con ductor, is a continuous copper tube 3g in. in diameter--surrounding a central wire which is held in place by circular plastic spacers. Looking at the ends of these units when grouped inside an overall lead sheath and plastic jacket is like looking down the muzzle of some futuristic, multi-barreled weapon. A coaxial cable system, like a microwave radio system transmits a band of frequencies spanning mil lions of cycles per second. This broad band is then subdivided into hun dreds of narrow bands, each used to transmit one high-quality voice sig nal over long distances. The bands required for transmitting television programs or high-speed data are much wider than those used for voice signals. A separate coaxial tube is required for each direction. The overall diameter of the cable is 3 in. and the lead sheath is 0.112 in. thick. Bell Systems engineers specified the lead-polyethylene combination as * "Lead Sheaths Newest Telephone Cable," LEAD, Vol. 27/No. 4, 1963 the best protection against the wide variety of environmental conditions the cables will encounter in their transcontinental crossings. Approximately 1000 miles of Co ax 20 cable will be installed in 1966 in addition to the some 13.000 miles of other coaxial cables the Bell Sys tem has criss-crossing the country. Developmen' of tlm new cable was prompted bv a program aimed at supplementing the rapidly growing microwave radio relay system that forms the backbone of the sys tem's long distance network. It is presently estimated that growth in long distance calling require a doub ling of network facilities every eight to ten vears. At the same time, room for more microwave channels on the radio spectrum is being used up, especially in and around cities but there is plenty of space left for more cables. And because coaxial cable is less sub ject to propagation changes and in terference it affords a very high de gree of reliability. Security is an equally important consideration favoring coaxial cable. When buried in the earth it is far less vulnerable to damage by storm or enemy attack than microwave towers; and common sense practi cally dictates a mix or diversification of communication facilities. L I A2b*tt ii .I I Historically, battery powered in dustrial trucks have led a sheltered life, rarely poking their forks out-ofdoors except in emergencies. The familiar design has been that of small diameter wheels with solid tires. The idea originally was intended to reduce traction friction losses to the minimum, a concession to the indus trial battery capacity of a decade or so ago. And so the electric has been a hard surface vehicle, not daring to get it's "feet" wet in snow, ice, gravel, or soft earth. But today's lead-acid battery de livers up to 70% more ampere-hours than those of ten years ago; today's solid state control systems contribute another 28-40% in battery life; and today's radically improved charger and charger techniques add still more life to the power source. So, even the small wheel, solid tire bat tery truck is venturing out into the open more often. More to the point, some electric trucks now sport large diameter, pneu matic-tired wheels, and they easily hold their own with competitive trucks, working full shifts on surfaces formerly out of bounds to them. We found some good examples: A more rugged assignment would be hard to find than that per formed daily in a 'West Virginia coal mine. Here, battery powered tractors haul out 600 tons of coal per shift, backtracking each outbound load trip with supplies to the working face. The running surface presents every challenge you would expect, but the heavy duty, mud-cleated pneumatic tires crunch in and out over the three mile round trip without difficulty. All the usual benefits of electrics--lowmaintenance, low operating cost, flex- A Maryland based electric utility uses pneu matic-tired forklift in loose gravel yard in every day operations. Works equally well in snow and ice. Battery powered mine tractor leaving Amigo Smokeless Coal's Jackpot Mine with 25 ton load for tipple. Note rugged tires and soft surfaces. 6-- -- L IA26465 Battery tow truck moves heavy containerized shipment from freight shed to ship's hold at Port aus Basques, Newfoundland. Outdoor con ditions are formidable in winter, but operations are not delayed. At the auto assembly plant this close-up view shows special rubberized material designed to cushion shock of loaded fork trucks and main tenance vehicles when crossing with heavy loads. Cracked and broken asles were elimi nated. a traction problem with the old-style, small wheel electric fork trucks. It took some doing but the Stores Department finally located a vehicle ideally suited to the job. Pneumatic tires are standard equipment on these fork lifts and the company is in pro cess of converting their entire fleet to the new line. Gravel surfaces make up about a third of their yard, and snow and ice are factors in winter; but these are no longer obstacles. (Incidentally, the sales-minded Manager of Stores of this company has some excellent cost records on the fleet showing the many advan tages of "going electric.") But, as if to prove that there was no problem after all, a major auto manufacturer has found a way to accommodate, outdoors, the small wheel and solid tire of his older, but still dependable electrics. As the plant engineer said, it just didn't make sense to pick up a load outside with one type of truck, and then unload and reload on another type inside the door. So they tried using electrics all the way out and in. The only hitch was that the smallwheel vehicles kept cracking their axles when going over the railroad crossings with heavy loads. That turned out to be an easy one ... the crossing places needed re placing, anyway. So a consultant from one of the rubber companies was called in and a new material was developed for crossing plates that cushioned the shock, when the loaded trucks rolled over them. No more cracked axles! Finally, we searched for the most "outdoors" location that we could imagine and found a good one . . . at Port aux Basques, Newfound land! Temperatures here reach some low lows and stay that way for weeks. Yet the rail and steamship line that serves this bustling, frontierlike port uses battery powered tow trucks year 'round to load and un load cargo containers in freight sheds and transfer them from ship to rail and rail to ship. Although cold weather does have some weakening effect on batteries, it is no contest with the havoc cre ated when trying to start internal combustion engines in that same weather. The port, by the way, is enjoying a tremendous influx of commerce, and is expanding at a rapid rate due to a government spon sored campaign to attract tourists to the many woods, wildlife and water facilities. It would seem safe to predict that the battery powered truck has at last come out in the open to stay. Most of the recent improvements in fork lifts have been in the electrics, so it follows that the next important change will be in the wheel assembly style, increasing their well-known versatility even more. 7-- -- L6 LEAD CERAMICS SPARK NEW DESIGN APPLICATIO . . . A Matchless Igniter In the past few years, solid state ceramics have truly made an im pression on modern living. From the ubiquitous transistor radio to T.V.'s the size of a cigarette pack, these materials have helped to brighten our Press the lever end ZAP, 20,000 volts ere releesed et the Ignition eree. No batteries, electrical circuits, trensistors or tubes to wear out, replace or recharge in this re liable spark device. leisure hours and lighten our work load. One of the most curious--and use ful--of these solid state devices is the Spark Pump Igniter. Developed at Clevite Corporation, this "solid state match" utilizes lead zirconatelead titanate, a piezoelectric ceramic. Squeeze the lever and it produces a series of powerful sparks--three times more than is needed to ignite any of the common fuels listed in the table below. Potential uses reach from the gas range in your kitchen to a self-con tained spark source for your automo bile of the future. Numerous units are already in use as the faithful "light er" for Coming's Patio Broiler. Other commercial applications for the Spark Pump Igniter either cur rently in use or in the prototype stage: camp stoves, infrared heaters, A Mag The best Ultrasonic Cleaners are powered by lead zirconate-titanate transducers. Ceramic permanent magnets wj lead oxide additions have been foul The Corning TM Patio Boiler. All you do is turn on the gas. press a lever, and sparks instantly ignite the broiler. hot -water heaters and outdoor lights. Because the lead zirconate titanate is piezoelectric, it not onlv produces electricity when squeezed, but also changes shape when voltage is ap plied. This has resulted in numerous applications in the field of ultrasonics and sonar. Another more familiar application is in phonograph pickup cartridges. to be just the ticket for cutting < ergy requirements for the motors lb t , run these devices too. In fact, most them were just not practical until tl| more efficient ceramic magnets ca: along to conserve battery power increase motor energy, or both. The main reason the magnets duce energy drain on the battery that no current is required to ene] gize the motor field. In addition, tl magnetic field is more uniform th; the typical wire-wound field, thus t MINIMUM ENERGY IGNITION REQUIREMENTS (Based on optimum fuel/air mix) Fuel Joules Acetylene l Benzene Butane r Gasoline Natural Gas P Hydrogen pV Methane Propane .00003 .00055 .00076 .00030 .00200 .00002 .00033 .00031 overall output of the motor is betti for equivalent horsepower ratings Current applications of these ramie permanent magnets are not co: fined just to home appliances eitht -- the automobile, with its man accessory requirements can use an; where from 6 to 20 ceramic magni LI A 26 At 7 Of course, outside of the motor use, rrsmic permanent magnets utilizing Ld are finding numerous design ap plications; the following are just a of the more interesting ones: i Magnetic Separators for removing ferromagnetic contaminants from ' nool. tobacco, china clay, grain, feed, liquid coolants, tea, coal, and quarried stone. i Pulley Separators--For conveyors. i Automatic Drum Separators--In chute tvpe operations. i Floor Sweepers--Pick-up ferrous metals from tables, floors, parking lots, etc. 1 Magnetic Chucks--Surface grind ers, drill presses. Sheet Fanners--For feeding and handling sheet steel from cutting room to punch press, stamping press, etc. 1 Fishing Magnets--recovering ob jects from tanks. ' Holding sheet plate to overhead conve vevors. Noting that "Too much emphasis is currently being placed on economy in bridge design," members of the American Institute of Steel Con struction Prize Bridge Jury recently named several bridges opened in 1964 that defied this trend. And four of these outstanding bridges were painted with basic lead silicochromate paints. Wearing a threecoat system as specified by the State of New York Department of Public Works, these Prize Bridges will still look beautiful many years later-- thanks to the built-up corrosion re sistance supplied by everv coat of this lead-pigmented protective paint svstem. Normally, if you want corrosion protection on structural steel, the color palette is limited, hut with basic lead silico-chromate pigments the color may be suited to the structural design and setting. Commenting on the esthetic considerations, the jurors pointed out. "Attention to appearance should be given increased emphasis" in bridge design. First Prize, Medium Span (Low Clearance): Tompkins Street Bridge, Binghamton, N.Y. --Owner: State of New York. First Prize, Long Span: Robert Moses Bridge, Long Island, N.Y. Owner: Jones Beach State Parkway Authority, Babylon, N.Y. Weighed in the balance, lead-asbestos pads are not found wanting STEADIER THAN A ROCK The period at the end of this door for these rooms has been care sentence weighs about 5 micrograms. fully selected. (Sliding doors are The balances used in pharmaceuticals used rather than swinging -- they research at the Lederle Laboratories don't cause drafts! ) Humidity is con in Pearl River. N.Y. routinely make trolled. Temperature is held within a weighings accurate to one microgram range of just one degree. The lighting --one fifth of the amount of ink that is even and cheerful but so arranged constitutes this little dot (.) ! that direct sunlight never gets within Fine balances they are, and right a barn door of the balances. fully acclaimed masterpieces of the Formerly these balances were in instrument makers' skill. But without stalled on the sixth floor of a research taking an iota from their perfection, no instrument can do such delicate center and using them was a lot like taking the pulse of the surrounding ll work without extraordinary precau activity. A door slammed three labs tions. Each balance is in its own cubicle and. thanks to painstaking down the hall, somebody setting down a heavy gas cylinder, most any -IT- facilities planning, even the type of Sectional drawing shows pier, pad, inertia block and slab of the balance table. Note beveled edge detail of pad to prevent load bearing by these edges. iw sTo*r Sl ae > thing that happened--it all registered on the balance's scale along with the weight. People with lab experience are familiar with the problem--ac curate microgram weighings are as much the result of the worker's esti mate as the balance's exquisite sen sitivity. In the new facilities it actually happened that a pneumatic hammer breaking up a concrete floor 50 feet away did not even register on the balance! And a rail siding 400 feet away, though used infrequently, has vet to cause trouble. Here's why: In the new laboratory facility concrete piers entirely sepa rate from the building were run down to foundation level at the balance lo cations. Just below floor level (at grade) lead-asbestos pads 18 x 46" were installed on these piers. A con crete inertia block of the same di u.. .............. This pier carries the balances and is sepa rate from the building structure. floor level. Another, a 1" air space, occurs between the surrounding table top and the marble slab. Without these, of course, vibration could get into the critical area--but that hasn't happened in the 24 months the facil ity bis been in use, nor is it ex pected to. In this installation the lead-asbestos pad is subjected to a total static load of less than I psi--a far cry from the 1000 psi required of some such pads used in modern building founda tions, One change occasioned by the lighter loading is the detail used to seal the edges. This "beveled edge" eliminates any possibility of struc tural load bearing bv the lead itself. mension and 18" thick brought the surface up to floor level. And the Pods were shop coated with asphaltum to protect them from free lime in the green table, of concrete blocks, was set up concrete. with rigid plaster and topped with a 4" marble slab on shock absorbing pads. These latter pads were sug gested by the balance maker's tech nical expert to prevent damage in event of earthquake--for, as he ob -- Ve" LEAD ASBESTOS ROLL FIRE FELT served of the balance table, "I've never seen one as steady as this be lVs' -~y6" LEAD fore!" -- ASBESTOS ROLL A vibration break of fiberglass FIRE FELT batting topped with a thin layer of -- y8" LEAD flexible waterproof calking is used at ~10- Ll*26 4fc9 (jttwM&u? OcCcU 'H' 2*ttU <docct Jlead ijj j(ned laundry truck gets "llCT" ' as*1 at Los Alamos Lab ^refill procedure is used to laun- fj>d decontaminate clothing worn w workers who handle radioactive ^><.1 at the Los Alamos Scientific (jtoratorv. The laundry is picked - by lead lined trucks of the Inter- Laundry in Santa Fe, New Mex- Wooden water mains had a lot of virtues... like long life. These turned up in the course of some street re pairs in Copenhagen, Denmark. No body remembers when they were laid or went out of service. Making joints for branches like this one called for NBS Foxes the President or some thing. The following is quoted from Measure for Progress, a History of the National Bureau of Standards, by R. C. Cochrane: "An avid reader of detective and mystery novels, the President [Woodrow Wilson] one morning sent a messenger to the % irried <* over what is said to be m of the longest laundry routes in J* nation and decontaminated in a feci*J laundry area. Stringent safeij precautions protect washing crew; Bureau with an envelope bearing his seal. He had read the night before that such a letter could be opened and resealed without any sign of tampering. Could the Bureau do it igibut radiation, When the laundrv too? A day later the President had W returned, again in leaded trucks, u bu not been ironed. Apparently his sealed letter back, apparently in tact. Inside was a note and the lead laundry people feel that they have discs from which the fraudulent seal boe enough. an equally durable and easily worked material. The moral of the story is replacing his seal had been made overnight." if you are looking for service life to "Waterproofing" your soldering outlast the longest memory, try lead. Saturn Rocket rolls along on lead IfOU, If you're a tinkerer (or a --The giant transporter designed to jbker) w'ho works with soldering (root you know all about filing down ike tip and retinning now and then to keep it free of pits. You may not k*re thought of it exactly this way, fort those pits are caused by the cop per'dissolving in the molten lead-tin K^er. One manufacturer has now Nrsterproofed" (would you believe "fcd-proofed"?) soldering irons by I clever hut simple trick--his solder tuts enough copper pre-dissolved in it that it won t wash away vour iron's tip! A national magazine recently re ported an industrial pilferage ring making off with $100,000 worth of lead by melting it down, casting it into shapes to fit around their bodies, and lugging it out of the shop under their clothing. We will not presume to argue the facts, but lest any reader think this gang of crooks had more brain that muscle we would point out that $100,000 represents about 200 tons--or, let's (groan) say 8000 (ugh!) back-breaking trips (oof) of 50 pounds each! move the Saturn out of the shed and to the gantry at Cape Kennedy is now an operating vehicle. It had been held up until now by failure of the wheel bearings when loaded up to its rated 12 million lb. Tapered roller bearing shattered when it was tried with the load aboard. Now the steel rollers have all been replaced and a bronze-tin-lead sleeve bearing has been substituted--about a fifth of the metal in the new bearings is lead. The unit tested out perfectly up to its maximum speed of 1 mph under load. 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 i CKANGt Of ADDRtSS ADO Mf TO TOUR MAILING LIST (pteeje <r<te one/ From----- -----------Name, title P-EASf CHECK INTEREST Company Street City, state, 2ip code To ----___ Name, title Company Street -- ----- ------------- --- __ Arcr *fc-:vjra! & be dmc ----- - - --- - -- _ DesiQ-' E r q i e e' ----------------------------- ,___ Ceramics ------------------------------------- Radi<?*'on ------------ ------------ ---- l j Other j (please specify; LIBRARY OF TECHNICAL INFORMATION UJJJUJJJJVLIJJi/ UiJUjJJJJ vtjjj The following publications are available free of charie unless otherwise noted. Send request to LEAD INDUSTRIES ASSOCIATION, 292 MADISON AVENUE, NEW YORK, N. Y. loQt I 1 NEW LISTINGS Isolating cooling tower vibrations New electroceramic data Lead roofing '65--modern appeal in traditional material Two page illustrated synopsis of instal Practical lead sound barriers Twelve page manual gives specific wall constructions and performances. Lead sheathing for power cable Materials of construction review lation of a terne roof on a Canadian labo ratory building. Lead roofing and flashing Sixteen-page handbook gives all standard Corrosion data--lead & alloys iItj lead roofing systems. Nuclear materials GENERAL High-temperature lead joints Radiation protection i Lead & zinc supply and demand Waterproofing with sheet lead Anodes for cathodic protection Authoritative examination of the short and intermediate supply and demand prospects for lead and zinc. Thirty-five pages. Lead work for modern plumbing $2 per copy; $1.50 for 10 or more. FINISHES New uses for lead Design engineering data ENGINEERING Soldering alloys Classification of inorganic enamels Two part description of inorganic glass, enamels and application techniques. Three BATTERIES Something new to know about battery power New developments increase capabilities of battery trucks and truck programs. Picture book of power batteries New developments in soldering equipment and methods Five new soldering techniques are de scribed and shown. Best features of each are indicated. Four pages. Where to use terne coated steel Four page reprint summarizes new indus tables, six pages. Follow the safety line with chrome yellow Formulations and suggested applications for chrome yellow safety paints. Eight ' pages. Lead paint systems for bridges 1 Industrial truck costs in a jiffy trial uses for terne, a lead coated steel. Two reprints | CONSTRUCTION Lead to control sound and vibration Isolation of buildings from vibration Three reprints discuss a number of case histories of the use of lead-asbestos pads to control ground-borne vibration. Modern chemical construction Method of lining lead tanks Use epoxies to line tanks with lead Cleaning "hot" parts ultrasonically Piezoelectric transducers Decorative finishes for lead Red lead based paint systems Porcelain enamels: For aluminum Low temperature steel Molybdate opacified enamel I 1 1 f j Ways to reduce press vibration Importance of lead in glass Glazes for brick UPON REQUEST, THE LEAD INDUSTRIES ASSOCIATION WILL BE GLAD TO MAIL "LEAD" REGULARLY, FREE OF CHARGE, TO THOSE INTERESTED, AND WILL COOPERATE WITHOUT OBLIGATION IN THE SOLUTION OF YOUR LEAD PROBLEMS. PRINTED IN U.S.A. 287 Reproduced by letterpress from lead type. CLJDF-KALKHOFF-BLRR, INC. NF.w YORK, N. Y. *1 Mail to: Lead Industries Assn., Inc., 292 Madison Ave., New York, N.Y. 10017 Name, Title Company | Street ! City, State, Zip Code ' Please send____________ ______________________________________________ TO REQUEST LITERATURE L IA26471