Document MM5QMeN6Lb63ReDZRga6p6Mek

LEAD INDUSTRIES ASSOCIATION, INC. BATTERIES score a clean sweep ._/ Floor machine or money machine? The Du Pont power spray system cleans and polishes floors, but it found $84,000 at an electronic plant. Did you ever find a dime lying near your feet? In the past year the maintenance supervisor of a large West Coast electronics firm found $8-1,000 on the floors of his com pany's labs and offices. It wasn't in dimes--it was in savings on what had been a $170,000 annual floor cleaning and polishing bill. Central feature of the floor main tenance system that saved the $84.000 is a floor machine equipped with a power spray unit which dispenses specially prepared cleaning and pol ishing solutions, then does the muscle Top view clearly shows the absence ot a power cord. work of putting them to use. Both line-powered and battery-powered versions are available. The battery type is powered by two 12-volt in dustrial batteries and it rolls easily on non-marking rubber tires and despite the husky torque it develops at the 19-inch rotary brush, it doesn't wrestle with the operator as conven tional floor machines do. Batteries ideal for job Battery power has fitted ideally into the design of the machine. In the first place it frees the machine from power cords while it is running. This means that the operator is un tethered and can cover his ground without hindrance in the order which is fastest for him. In the second place, the whole unit is silent, foolproof, and powerful. A single batterv charge easily does all the work re quired in a typical eight-hour shift. The use of a novel combination cleaner and polymer finishing ma terial developed by Du Pont is the trick that makes possible the huge savings piled up by the system. Conventional floor care calls for sweeping up dirt and solid debris, spreading a cleaning solution, scrub bing, rinsing, and drying. At this point the repair coating can be ap plied and buffed. With the new floor care solution--Power Spray Cleaner and Finish--the operator simpb pours it into the dispenser, pressur izes it with a propellent capsule, and taps a button that sprays a fine mis! on the worn spot. He passes the ma chine over the area two or three times. Then, using a clean pad, h< buffs the floor to a scuff-resistant gloss. The machine, the power spray at tachment and cleaner-polish are products of E. 1. du Pont de Nemours and Company (Inc. t, Wilmington 98. Del. Power for on eight-hour shift is stored in these 12-vott teod-acid batteries. L1A263 89 General view of batten layout with work p~z*=--eas ing on roof sheets in foreground. Note hard copper cleats on battens. For those cold, Canadian winters -- General view of Metal Working Shop adioinirvg main laboratory and office unit. ^ LEAD LABORATORY ROOF Where would a company find a better place for applied research on building materials than its own labo ratory. And where, at the same time, would it find a better showcase illus trating the utilitarian suitability of these materials. In the case of the Consolidated Mining and Smelting Company of Canada (Cominco) the laboratory is its new Product Re search Center in the Sheridan Park Research Community near Toronto. The basic materials are lead and zinc and. among the more than 200 appli cations of these metals demonstrated b\ example is the most prominent: a lead roof on the Metal Working Shop. This is a material whose `'applied research" dates back a thousand years or so but whose usefulness for waterproofing, sound and vibration insulation, corrosion resistance and decorative uses has expanded with each age to keep it in the forefront in the development of new and better uses for building materials. A 3 pound hard lead sheet provides a durable, low maintenance covering for the roof of the Metal Working Shop. Cominco, in collaboration with their architects: Shore & Moffat and Partners of Toronto chose a batten seam type of roof because it is easier to install and generally better than standing seams. Battens impart rigid ity and provide better means for movement of the metal sheets. Three-pound hard lead is the pre ferred material for roofing of this sort. It is an alloy containing a small amount of antimony and it has ample strength and durability for all usual roofing constructions. Since it is only approximately 3/64 of an inch thick it is quite easy to work. Unlike other metal roofing, lead shows no tendency to "spring back" when bent. The roof substrate is precast in sulating concrete to which nominal 2" x 2" wood battens are bolted about 16 inches on centers. In the other direction, at right angles to the slope of the roof, sheets are limited to about four feet lengths by fiat seams which in turn are staggered on either side of battens. The problem of housing certain exhaust and in take mechanisms necessitated vertical bulkheads housing an exhaust plenum along the roof ridge. The vertical lead panels resulting from this con struction were easily supported by the battens placed vertically and were another reason for their choice. Finally a contribution to the overall design concept of the roof results from the pleasing continuity afTorded by the run of batten from gutter line to top of plenum. Detail photographs illustrate clear ly the use of batten caps folded onto roofing sheets brought to either side of continuous wood battens and se cured by 16 ounce copper cleats nailed to battens on about 24 inch centers and folded into the seam. A total of 12 tons of 3 pound hard lead sheet was used by Heather and Little, Toronto, who were roofing contrac tors handling the installation. Detail of plenum housing showing batten system used to fasten 3 lb. hard lead roofing. Closeup of intersecting battens before placement of cap sheets. Inset shows wrap around of cap sheet at intersection of vertical with horizontal batten. O --o-- LlA2639C Order being filled with electronically controlled truck. Note control box carried by operator at waist. Truck can be ma neuvered from any reasonable distance. "Food Is A Bargain motto of the industry, is certainly subscribed to by The Fleming Company. Topeka. Kansas. Operating in eight south cen tral states, the company distributes more than 5000 items through six modern food distribution centers to more than 900 retailers. In the spaciousness of the mid continent area, Fleming is utilizing one-floor operations and their flow plan for receiving, stocking, and ship ping products is smooth and uninter rupted. Long lines of freight cars roll into the distribution center, are un loaded, and contents palletized. Then by tugger and lift, walkie and rider, the myriad of items are stacked or racked to await the order picker. A roving supervisor untangles knots and gets action on rush orders hv nreans of a battery scooter. He seems to be everywhere. Reminiscent of super-marketing housewives, but motorized, the order pickers wind their way up and down the aisles, choosing a package here, a carton there, checking their lists as they go. Some ride, controlling manually, stepping on and off: others walk along guiding remotely by elec tronics. "The flexibility and versatility of the wide range of models available in battery powered trucks is a ven significant factor in keeping our costs down," says Don Block. Fleming Manager of Warehousing and Truck- "W hether our customer needs a trailer load, or only a dozen items, having the right handling equipment at the right place at the right time means dollars saved for the ultimate cunsumer." Frozen products being stacked in sub-zero (minus 10C F) room. This truck has been operating full shifts in this room for more than eight years. ook Ahead with Lead Walkie and Rider being used to unload freight car at receiving dock. Van (right) is loaded at shipping dock. Note various size orders stand ing on skids awaiting loading. A PLACE TO HUNT* "One step . . . two . . . suddenly, foot from the dog's nose, a wood cock bounced into the air. My gun came up, and when the muzzle blotted out its target I pulled the trigger. The quiet morning air was shattered, and | saw the timberdoodle fold and plummet to the ground as Babe bounded in to make the retrieve. We had been hunting just five minutes. " `I like this,' 1 told Bill, shoving a load of No. 8 shot into the lower chamber. " `You and a lot of other people,' he replied. `But you haven't seen any- Coniervation worker checks to make sure this hunter has his special one-day pass which limits the number of hunters on the tract. thing vet. We've still ?ot 6999 acres to go.''" The quote is from Ted Janes' ar* tide in Outdoor Life. The place is the 7000 acre hunting cooperative in Dutchess County, N. Y., just 85 miles from Manhattan. The idea is to pro vide good hunting to hard-pressed metropolitan residents under the New York State Fish and Wildlife Man agement Act of 1958. Under this act, three such coopera tives have been set up. In addition to the 7000 acres at Dutchess there is a 4400-acre tract in Long Island's Suffolk County and an 11,000-acre co-op in Putnam County just north of Brewster. In all three of these areas, state conservation people have worked with the land owners' permission to improve the hunting prospects and police the hunters. Cooperating land owners are protected against vandal ism and trespassing, for example, without the trouble and expense of fences, posting, or extra hired help. The number of hunters in each area is regulated bv permitting hunt ing onlv under a special one-day pass which can be had by anv licensed hunter by simplv depositing his li cense for the day. His return to pick up the license insures that he has not violated the bag limit. The concentration of hunters throughout the tract is controlled Inpermitting hunting only in areas ad jacent to marked parking areas. Each area accommodates a maximum of one, two, or three cars. The result has been the opening up of areas previously 90 to 100 per cent posted without introducing stocking or ar tificiality. * Condensed, by permission, from OUTDOOR LIFE, October 1964. During the 1962 season 3641 hunt ers visited the Dutchess tract. Rec ords at the Putnam County co-op, typical of the program to date, show that 7000 hunters used the tract in 1959, 3000 of them only once and the balance returning as many as 17 times. An average weekend at Dutchess finds 130 to 150 people get ting back to nature and even on the average weekday 50 hunters range the 7000 acres. Like the millions of Americans now flocking to public shooting ranges, these hunters are finding books and TV paltry substitutes for the wonder of being in the woods and the satisfaction of the real and tangible. Babe brings back the bird. ^ ^ ^2 639 2 According to current estimates, the U. S. marine industry spends $185 million to repair damage caused by corrosion. One of the most advanced systems designed to prevent such damage has recently been installed on the modified tanker, S.S. Angelo Petri, owned by United Vintners, Inc. Cost of this installation was under $10,000 according to the Marine Services Division of Lockheed Air craft Service Companv. Ontario. Calif., la Division of Lockheed Air craft Corp., Ontario, Calif.) who de signed and produced the svstem. Marine engineers estimate the svstem Corrugated lead-platinum anodes installed on the hull exterior. The anodes are attached to the through-hull connector before en capsulation. will pay for itself within two years through elimination of normal cor rosion repair costs. Kev elements of the system are anodes constructed of lead with plati num inserts and a patented automatic control system that maintains the ship's hull and fittings at an electrical potential where corrosion does nol occur. The unusual anodes, constructed of lead containing platinum nails, are not sacrificed in the corrosion pre vention process and therefore do not need replacing. In operation, a sur face layer of lead dioxide quickly forms. This material is a very good electrical conductor and can operate at low electrical potentials because of the ease with which it can discharge oxygen and chlorine. This is partly due to the verv large true surface area which the porous yet strong lead dioxide laver possesses. In addition, should the face of the anode be damaged from scraping or gouging, the underlying lead is able to deform without fracture and the damaged lead dioxide layer will re form within a few hours. Accordinglv, such a system is able to tolerate extremes of rough treatment with out detriment or interruption of cathodic protection. Anodes may be flush-mounted within a ship's hull or, as on the Angelo Petri, mounted in a very low profile configuration on the hull g face without impairing the sh it hydrodynamic characteristics. |U, Generally, to obtain complete p tection, anodes have to be placed f and aft and midships. The latter '>) not always essential on small shi 611 On the Petri the 16 low profile anoi (1.5-in. high) are mounted to hull with the necessary electrical cc nections made through a small h< .acr' 'mmodating a through-hull gl assembly. This construction is said reduce the installation costs appr ably. The control equipment of the Lor] heed svstem consists of I ] i sensi cells (silver'silver - chloride el trode), (2) magnetic amplifiers, 13`_ saturable power reactors. (4) strjfip-i down power transformers and rectip fier assemblies. An important feature of the syl tern is the patented reference elea trode circuit which causes the sil ver/silver-chloride cell to be aulg maticallv rejuvenated. This mean that its potential, and therefore th^ of the hull, is alwavs maintained at] an exact predetermined level. Then are no moving parts; the entire conj trol system is solid state. Once thl system has been installed and set, no adjustments whatever are required^ As a result of the tremendous cur-5 rent carrying capability at very potentials (240 amp at 4 v) of the?1 LIA26393 *m, it >s possible to protect the wetted surface of the hull in- ding screw and rudder and reareas. Even in the absence of Lint (particularly on the bottom of tip*which are frequently grounded) nplete corrosion prevention is as- Mrtd. Although the installation aboard e 5-S. Angelo Petri is the first on r commercial vessel, the system has K-atedly proved itself on naval :1s and a variety of shoreside in itiations such as dredges, lock gates, ran towers and docks, and similar I* ilities since 1961. nufecfuring the lead-platinum anodes. Iw anode and its lead is being mounted in steel box which will fasten directly to the Grownups admit it too-- LEAD SOLDIERS ARE FUN A recent article in the New York Times claims that "adults who once sheepishly collected lead soldiers, built backyard battlefields and played elaborate war games have been emerging from clandestiny in the New York suburbs." Whatever the reason for the in creasing boldness on the part of this underground movement, the fact re mains that the appeal of lead soldiers has never been confined to small boys. The hobby, as practiced by adults is necessarily much more sophisti cated than the grade-school version. For example, it can be expensive. Each soldier must be a microscop ically accurate replica of a historic uniformed figure, handpainted ac curately down to epaulettes, braid and buttons. There is a hierarchy among lead soldier makers too. For example, says the Times, a figure molded and painted by Stadden of London might be worth $90; the same mold painted bv someone else might be worth as little as $10. Contemporary collectors number their troops in the thousands and have miniature Romans, barbarians. Napoleonic troops, desert camel troops and commandos from World War IE Antique soldiers are the undis puted aristocrats of the field. Some museum pieces date back as far as the 18th Century and bring $200 or more in auctions. Naturally, sets of these vintage warriors are highlv prized and are virtually impossible to find. When lead soldiers were first made, lead was the only inexpensive ma terial that could be cast without los ing fine detail and be reworked if necessary. And lead has remained the favorite with serious collectors of historically accurate replicas even though plastics seem to have cap tured the greasy kid stuff market. The chief reasons for lead's domi nation in this hobbv is its durability and adaptability. Skilled hobbiests will carve, solder, paint and other wise alter a relatively common molded figure into a likeness of another sol dier, often with a completely differ ent uniform. For a description of this process, see LEAD. Yoi. 26 No. 1, 1962. There is apparentlv no cud to the varietv of military games that can be played with the tw o-inch high troop ers. Elaborate reenactment of histor ical battles is one approach. Such games, with complex ground rules, can last for several davs and there is no guarantee that the miniature battle will end like its historic prototvpe. LIA26394 Four jets of hot gas (700 F) enable operator to complete 250 eighty-joint microelectronic packages per doy. Thickness of the solder coating preplated on the boards is 0.003 in. An indication of how small the jets are can be gained from the fact that little mare than 1 cu. ft, of gas passes through each orifice per hour. Ask any military electronics con tractor. Integrated microcircuits are revolutionizing the military electron ics business. These tiny silicon wafers are the equivalent of diodes, tran sistors. capacitors and resistors--all wrapped in the molecular structure of one device. The revolution has come in the form of reducing the size and weight of complex electronic gadgets. An ex ample is a new radio-navigation re ceiver produced by the Sperry Gyro scope Companv of Great Neck, N. N The receiver is 20its former size --and three times more reliable than sets using conventional circuitry. But. while these wafers represent a great advance, their tiny size has created monumental problems in join ing them to the sub-assembly cards that make up the guts of electronic "black boxes. ' Depending upon end use. as manv as 100 of these wafers must be attached to a sub-assembly card: and thousands of cards might then be needed for one device. To do the soldering by hand would prove so costly as to be out of the question. Now the job can be done at 1/100th the cost of hand assembly! Engineers at the Sperry Gyroscope Company have developed a hot gas soldering unit that automatically solders 20,000 joints per dav--and they believe it can be easilv scaled up to 500,000 joints per day. The versatility of lead alloy solder is the key to this highly reliable yet economical development. As adapt able to automated assembly as it is to hand joining, solder is today as modern an adhesive as the material it joins. For example, rather than lay solder down on the leads of each microcircuit, Sperry plates the solder onto the sub-assembly cards in a pre soldering operation. Next, the oper ator places a netw ork of microcircuits on a sub-assembly card which is moved at a uniform rate under a jet of hydrogen gas hot enough to melt the solder without damaging the card or the microcircuits. Hydrogen is used for several reasons, the most im portant being its high thermal con ductivity--which means that much of the heat gets into the solder where it's wanted. Of course, the use of gas is in genious because it allows the opera tor to visually inspect each joint as it is being made, it also eliminates the possibility of passing flux contami nants from joint to joint. An addi tional plus in using hydrogen is that each joint is enveloped in a non oxidizing atmosphere during forma tion. This assures good bond and electrical conductivity. Sperry has predicted that develop ment of this machine will speed the day when integrated microcircuits will replace transistors much as tran sistors have replaced the vacuum tube in commercial applications. Pilot study of automatic microcircuit solder ing was done on this commercially avail able machine at Sperry Gyroscope Com pany recently. Besides being fast, Sperry claims the process is ideal tor high-reliabilify equipment. Soldering with this technique demands no special skills, --8-- LI A2&395 The worldsNlargest lead sheathed telephone cable being installed in North Ridgeville, X)hio. This cable. 2400 ft. long, uses a\lead sheath to crowd 6.060 conductorsyinto a mini mum overall diameter, \hese are more conductors than are Hjed in anv other lead sheathed cable According to Harmon Gay. c engineer, Mid-Continent Telephone System: "We used lead sheathed cable on the job because of its un questioned reliability, and also, be- of the small diameter of the existing conduit. No other sheath ma terial would permit 3.030 pairs of wires to be contained within a 3-inch diameter cable. This diameter was essential if we were to use existing conduit that is four inches inside." Completion of the cable project will enable the Elyria Telephone ^Company, a Mid-Continent affiliate, offer simultaneous private service to 3tQOO additional subscribers. Previbqislv a relatively rural terri- CrossVsection of/4he 3030pair caple. TWse are more conductors than are used in any other lead-sheathed cable. tory, the area (near Cleveland) has been growing in population. Requests for private line telephones rather than party-line service have been in creasing, stated a telephone company spokesman. 6,060,000 Feet According to Anaconda W ire & Cable Co., suppliers of the cable, the cable contains 6,060,000 feet of cop per conductor concentrated in each 1000 feet. This adds up to over 4800 lb, of copper per thousand feet; with lead and insulation, total weight is increased to nearly 11.000 lb. The cable's internal design consists of 30 individual paper-wrapped compartmentized sections each of which contains 101 pairs of conductors. The number of conductors in each section and the manner in which the sections are patterned are determined by the type, size and function of the cable. The cable conductors are insulated with an overall wrapping of paper then sheathed in a 125 mil thick lead sheath. The cable is being supplied in lengths ranging from 160 to 810 ft., designed to fit the various distances between connecting manholes along its route. LI A 263 96 "Best in Queens Borough tor 1963" said the New' York Times . . . and, because the bright yellow wall panels (inset) are made of leaded porcelain en ameled aluminum it'll be equally good in 1973. Color uniformity and durability are prime features that distinguish this inorganic finish from all others. More than 12,000 sq. ft. of porcelain enameled aluminum sheets were used in construction of the Social Sciences Building and Lecture Hall at Queens College of the City University of N. Y . Elliptical airfoils (upper right), in two shades of stippled gray leaded porcelain on aluminum form an attractive sun louver for Hamot Hospital, Erie, Pennsylvania. About 10 feet long, the foils were installed in frames by Construction Specialties of Cranford, New Jersey. Nearly 15,000 square feet of leaded porcelain enamel was permanently fused to these aluminum shapes without serious warpage. SOMETHING in leaded DIFFERENT porcelain enamel Porcelain enameling of aluminum is nothing new to Porce-Len, Incorporated of Ham den, Connecticut. "Over the past 10 years several million square feet of porcelain enameled panels and extrusions have gone through our furnaces" says Mr. Robert Goodman, executive vice president at Porce-Len. But it is not too often that a really new and different application comes along to fully challenge the versatility and workability of the medium--here are a few that did. All were done at Porce-Len, Inc. and all have been highly successful in use. Panels of leaded porcelain on aluminum were created to perfectly match glazed brick used in another part of the same building at Queens College. An unusual dip coating process (it's generally sprayed) was utilized in making a solar screen, and embossed sheet was used in another job, all adding up to something different, Solar Screen . . . lightweight, attractive and durable. Over 25,000 porcelain enameled aluminum cylinders 5 inches long and 3 inches in diameter were riveted canopy for fhe cafeteria of a building in Heightstown, New Jersey. An attrac tive blue-green in color, the riveted can isters were framed and installed by McKeon, Incorporated, Glass and Curtainwall contractors of Philadelphia. -10LIA26397 OctcU uU a&cut ^.ead ^ srna|| lead coffin found in an excatjon in London has been judged to contain the remains of Anne, Dutchof York, child bride of Richard, 0"nc of the doomed "Princes in the Tower"- The wedding of Anne, age foUr and one half and Richard, age East Bethpage Hoad. Plainview. N. ^ . is looking for you. Templet recently acquired the rights to license United Slates manufacturers for a new proc ess for making impact resistant glass lined metal pipe. The new process consists of inserting a thin glass tube in a metallic pipe using a lead boro silicate binder to unite the glass tube with the metal sleeve. The resulting arrangement is claimed bv its Japa nese inventors to produce a relative!\ stress-free glass coating for use in the chemical and allied industries. Cou plings may be made by welding or the use of stainless steel fittings. Elbow bends of any angle are made using a portable heater. No cracks or flaws are said to appear in the newly formed section. five, so delighted King Edward IY that he created the order of Knights of the Bath. Anne died mysteriously in 1481 at the age of eight. Her re mains, along with a linen wrap, were well preserved bv the sealed lead coffin. Looking for a glass lined pipe process? If so. Templet Industries. Inc., 201 Big Bridge Quiz . . . survey shows red lead at the bottom of things. Consid erable detective work was necessary, but the results were most gratifying --out of six owners responding to our inquiry on the primer used on new bridges in the American Insti tute of Steel Construction Prize Bridge Competition, all six used red lead primers. Shown here is one of the six. the Long Span Prize Bridge for 1963, the Lewiston-Queenston Bridge, over the Niagara River be tween Lewiston, New York and Queenston, Ontario. The owner is the Niagara Falls Bridge Commission, and the fabricator was Bethlehem Steel Company. Painting specifica tions called for two coats of red lead- iron oxide primer meeting Steel Struc tures Painting Council Paint Speci fication #2. Thirty Years Ago A while lead undercoat was an essen tial preparatory step in gilding the large bronze statues in New York's recently completed Rockefeller Cen ter according to an article in a 1934 issue of LEAD. Reasons for the coat: lead provide- a better bond for the leaf and the paint serves to fill irregu larities in the surface and make a neater finished job. The paint also provides a protective coating to pre vent the base metal from weathering and discoloring the statue at any thin spots in the gold leaf. 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--------------------------------------------------------------------------------------------- I CHANGE OF ADDRESS ADD ME TO YOUR MAILING LIST (please circle one) From___________ Name, title Company Street City, zone, state To________________ Name, title Company Street City. ion.,,tat LI A26396 PLEASE CHECK INTEREST I I Architectural & building Design Engineer 1 I Ceramics I | Radiation n Other (please specify) NEW LISTINGS High temperature lead joints Four-page reprint describing method and results of comparative tests of lead calked joints in cast iron soil pipe. low temperature solder glasses New four-page supplement to ceramic data book, gives data on devitrifying and stable joining glasses. Electrical properties, expan sion characteristics and viscosity considera tions ore discussed. Modern chemical construction Description of types of lead products, and constructions used in the chemical industry. Design criteria and inspecting and testing methods also included. Twelve page reprint. Waterproofing with sheet lead Eight-page article gives methods and specifi cations for using lead in pool, planter, roof and shower pan waterproof constructions. GENERAL Discovering the beauty of lead New uses for lead Design engineering data BATTERIES The picture book of power batteries Truck costs in a jiffy CONSTRUCTION Pools and planters Removable walls with lead linings Isolation of buildings from vibrations Silver anniversary roofs laboratory drainage systems Lead work for modern plumbing $2 postpaid, $1.50 per copy in orders of 10 or more. Profusely illustrated 164-page text presenting clearly to the plumbing student the necessory tools, procedures and methods. Lead plumbing systems Seamless terne for roofing Sheet lead for moisture protection lead as a concrete filler lead-asbestos antivibration pads ENGINEERING Cleaning "hot" parts ultrasonically PZT transducers for ultrasonic cleaning High speed lead plating Importance of lead in glass Report and bibliography on lead glasses. Phase relations in the system Pb-0 Eight-page reprint lists phases in lead-oxygen system; stability ranges. Pb-, Ba-, SrHf03 systems. PbO-BaO-MgO-SiOj system. Soldering and soldering alloys lead sheathing for power cable Materials of construction review Corrosion data-lead and alloys Methods of lining lead tanks Cutting press vibrations Nuclear materials Radiation protection lead alloy anodes for cathodic protection Pb0-Fe203 phase relations Lead to control sound and vibration Anodes for ship protection Continuous extrusion press for cable sheathing FINISHES Lead paint systems for bridges Decorative finishes for lead Red lead based paint systems Properties ond compositions for 24 formula tions and systems for o wide variety of uses and exposures. 31 pages. Porcelain enamels: For aluminum, low temperature steel. Molybdate opacified enamel. 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. 28? Reproduced by letterpress from lead type. ----------------------------------------------------------------------------------------------------------------------------- 1 I I I Mail to: Lead Industries Assn., Inc., 292 Madison Ave., New York 17, N. Y. I PRINTED IN U.S.A. CUIDE-KALKKOFF-RURR, INC NEW YORK, N. Y. 'iName, Title Company Street City, Zone, State 'lease send_____ TO REQUEST LITERATURE