Document GmXVKaYdbreGQgXDEO4y5xVxr

Proper Maintenance of Public Toilet Rooms Made Easier With Wall-Hung Plumbing Fixtures N all public toilet rooms one of the I most difficult problems in connec lion with these facilities is maintain mg proper cleanliness alter the instal lation has been placed in use. Man\ persons shudder at the thought oi having to use such facilities usually because they expect, and very often jet. conditions that are a disgrace and more important, dangerous to health. To a large degree, this problem can be solved bv easing and simplifying the surface maintenance ot such utili ties. One of the prime requisites there fore is the proper planning and in stallation of such facilities so as to avoid the underlying causes that per mit such situations to develop. The first rule thenis the avoidance of inaccessible floor areas or areas diffi cult to clean easily. The second and probably more important aspect to avoid is the possibility of spillage seeping around the joint between the fixture and flooring. In this event, a verv unhealthy situation soon de velops that no amount of surface cleaning will cure. The only correc tive means then available is ripping out and replacing the installation. The solution fortunately enough is a simple one. requiring only that wall-hung fixtures be used in place ot 4 detail of iu o or the closets installed :n Famous & Barr's neu- department store. .Vote inverted lead bends vented with lead pipe. A battery oj iezibie lead connected wait nuns closets u.itn me cast-iron soil line above the .5tab as insiailea in the C. 5. Army Medical Depot, St. Louis. L l.'NUES PHOTO the more conventional floor fixtures. Cleaning present; no problem as the entire floor area is easily accessible to an ordinary floor mop. The floor itself is not likeiv to present areas through which seepage can occur inasmuch as there is no need for breaks in the continuity of the floor material. XX ail-hung fixtures of course Dre'ent problems of installation that are not encountered with floor fixtures. Ample support of the wall-hung fix tures is absolute'll' necessary and the piping connecting the fixture to the soil line must be flexible. The need for this flexibility is even more pro nounced in wail-hung fixtures than for other fixture connections because of the greater rigidity with which thev are held m place. These two problems of installation are in fact no problem at all if in stallation is made in the same or similar manner as that used m two recently completed public toilet rooms in it. Louis. Mo. The two in stallations differed in one important respect, the horizontal cast iron waste serving ail fixtures was under the concrete slab in one case and on toD of it in the other. In the first named case, lead bends providing the necessary flexibility for such type installations with flexible lead vent connections were installed in the public toilet room of the new south side store of Famous and Barr Lo.. a large department store in fit. Louis. The bends were calked with lead into the horizontal cast-iron sod line running under the concrete slab. Ample support for the wall-hung closets was, provided bv American Foundrv & Mfg. Co. adjustable dost! support No. 5. tvpe 1935. The MiaLitv Plumbing Co. of St. Louis were the plumbing contractors. A batterv ot wall-hung closet; will the main horizontal cast-iron ~o i i line on top of the concrete slat- was m -tailed in the U. 5. Airm Medira Depot. 3t. Louis. Bv rolling or oil setting the cast-iron Vs and with the aid of lead bends, a minimum of hon zontal space was required for the piping layout. Thus it was possible to have the waste outlet for the wallhung closets at the proper height and at the same time, maintain the neces sary tall in the soil line. Such instal lations are particularly suited to new toiiet rooms in older buildings. The adjustable closet supports were model No. 1, tvpe '1935. manufactured bv the American Foundrv A Mfg. Co. The plumbing contractor u as the E. J. Fischer Co. of St. Louis. L ! A 2-^8 B Lead's Part In Phonograph Record Manufacture r a n s f o r min g a lump of shel Tlac or plastic into a disc capable One oi the steps in phonograph record pro of reproducing sound is a ions and duction. The "metal intricate procedure in which lead piavs an uniauded but important role. master" disc is removed from lead lined clean ing and plating tanks Stripped of most ol the technical com after he tng nickel plexities. here are the basic steps for plated. making fine recordings. The operation begins with the mak ing of the original recording on a special lacquered disc known as the "master." The first step in reproduction is to metallize the grooved surface of the "master" disc so that it will conduct electricity. The method now most often used is the deposition ot a silver mirror on the "master" disc by re duction of a silver nitrate solution. After silvering, the disc is given a nickel plate of about 0.0002 in. thickness, followed bv a preliminary copper plate in an acid copper bath. In the next step, a thickness of copper far greater than that usually encoun tered bv the average plater is put on the disc--th.050 to 0.070 in. This is the trickiest part of the process, for the copper must have a smooth sur face entirely free of lumps and no dules. It must be hard and springy without being brittle and must have a w el 1-conlrolled and constant thick ness gradation from the edges to the center. Finally, it is desirable to sible. To those familiar with the problems of plating, this is quite an order! It is here, in the plating operation, that lead plays a doubly important role. Anode electrical contact is maintained bv a sheet oi lead usually ailoved with 1 percent silver placed under the anodes and connected to the positive bus bar bv an insulated strip of lead. A second important function is the maintenance of elec trolyte purity. Anv products of cor rosion from the plating tanks them selves. are eliminated bv using lead as the tank lining material. Lead's importance here is based on its chem ical inertness to the corrosive at tack of acid copper electrolytes which average about 32 oz. of copper sul phate and 8 oz. of sulphuric acid per gal.: a corrosive combination with which no other common metal can cope. Inasmuch as electrolyte puritv is produce these shells as rapidlv as pos vital to successful record plating, the Electrolyte purity is vital to successful rec ord plating and to maintain its purity, is continuously circulated through lead pipe and the lead lined hltcnne unit shown at left. STa * p h o t o s acid electrolyte is conducted in lead pipes to a continuous filtering unit which constantly removes any for eign particles from the bath. A tvpicai lead lined electrolyte filtering unit is illustrated. The electrolyte circulates continuously through the plating and purifying sections snown in the ac companying illustrations. After plating, the "master'' disc is separated by hand from the electroformed metal mold and we now have a copper negative, known as the "metal master." After centering and punching, the "metal master" is tested to find the musicai center. It is then trimmed to size and anv remaining silver film removed bv electroclean ing. After a final polish on a rotating spindle the "metal master " is com plete. The next step Is the formation of a "mother' disc. This is a positive plate and is made In approximated the same manner as the metal ma-ier. that Is. bv plating first with nickel and then copper. As before, a silver film betwen the two discs prov ides for earn separation alter the plating operation is completed. Now. for the first time, the record is plaved to check for "ticks" or other imperfections. At this stage of the operation it is possible to -correct some imperfections bv using fine en graving needles in the hands of skilled craftsmen. The next and last plating process involves the production of a negative tor making the finished record. And here again the process is identical to that described for making the "metal L I A2 f QP Q master'' and the "mother. ' The Imal jiroduct, called the "stamper. ' re quires areal care and rigorous con trol to acnie\e proper resuit;: hence the puritv ot the plating baths is particularly vital in this operation. The final step in production of the "stamper" is chrome plating in which lead aiso plavs an important part. The anodes and tank lining normally employed for chromium plating are made of either antimomal lead, tinlead or other lead base alloys. The hni-hed "'tamper 1' ia-tened to tile die- ot a record pres.- uheie it may be alternately heated or cooled by steam or cold water passing through internal channels. The main job ol making a record is finished and from now on it is simoiv a matter of filling the mold w ith record shellac or plastic and pressing out discs as long as the "stamper" holds out and as long as the public will buv. Actually plating operations for the record industry represent only a small proportion of the total lead and spe cial lead alloy- used ill tile plating industry. Practically all chromium plating is done in lead lined tanks and with lead anodes, the lead in this case being alloyed with other metals. Nickel plating requires lead linings and also uses lead pipe coils for heat ing the plating baths. Conyerseiv. lead lined anodizing tanks tor treat ing aluminum use lead coils for cool ing the bath, usually fay circulating brine or refrigerants such as Freon. Lead Has Two Useful Functions In Betatrons-- New Source of High Energy X-Rays N EW atomic big gun. the world's A largest betatron, has recently X-ray machine and the betatron is that the electrons are accelerated bv gone into action at the Uniyersitv omfagnetic induction instead of by di Illinois. It is capable of flinging rect application of high voltage. The electron particles of electricity at result is that the electrical insulation 300.000.000 electron volts to produce no longer is the limiting factor in the \-ravs and other effects. Manufac acceleration of the electrons and they turing the meson particles naturally can be given energies in the betatron found in cosmic ravs is one ot the not previously obtainable bv any jobs it is expected to do. The new ol her man-made means. betatron is one ot the largest atom Vi hen high energy electrons strike -mashers of any sort actually operat a target sucn as platinum or tungsten. ing although larger billion volt atom X-ray - are produced basing a ser\ machines are under construction. high penetrating power. Betatrons in The difference between an ordinary the 24- million electron volt range are Schematic lop new ot the 22 \1V betatron showing the ieaa coll: marine ana shielding arrangements and removable lead aperture plug. being used to great advantage in thick section radiography where high pene tration is needed. The small focal -pot inherent with the betatron and not with other X-rav machine- is nearly the ideal point source. This makepossible magnification of the obiects being examined yvithout sacrificing the ciaritv of the radiograph Radiation of such high penetration is exceedingly dangerous to operat ing personnel should thev be acci dentally exposed to it. Protection from the po\*erful ravs is effected1, achieved bv utilizing the excellent radiation absorption characteristicot lead. The iolloy-ing thickne--r-na\e been tound eauhalent for reduc ing to half value high energy radia tion produced bv the betatron : h in of concrete l1-, in. of steel ' in. >I lead i these values are rounded off for field use and are not recommeiuini lor more exacting calculations i Hie 300 million volt betatron used solely for physics research at the Lniyersitv of lllinoi- m Uhampaign. But a 22 million volt betatron is being applied to medical treatment; at the University of Illinois in t fin cago. During medical deep therapy treatment, lead up to 9 in. thick being used to completely shield the patient from harmful radiation from the betatron. Becau-e of the tremen dous magnetic energy invoked, o of the 9 jn. is made up ot laminated lead -.heels 1 '32 in. thick i 2 lb. -enarated - ith fish paper to reduce eudv cur- L 1 A 2 p q^ 0 Lett The ?j-tn. ir'Gd i/neid moitd to wie 'Lilt to aispias :he 1-in thick lead collimo- tnr Rieht Tumor therapy uuh the 22 MV betatron at the i ntversttv ot Illinois medical school. rent ow in the immediate vicinity of the alternating current magnet poles. By being arranged in this manner, the lead serves the dual purpose of acting as a collimator as well as an absorp tion medium for ravs emitted in di rections other than that desired. The lead also restricts the beam cone to the desired treatment area and serves to protect the patient from a general body dose. Outside of the betatron itself is another 3 to 4 in. thick lead shield made up of laminated V2 in. thick sheets. Fitted with a tapered steel faced lead plug at the rav outlet, this shield is laminated sheet lead i with out paper) only because it is more convenient to handle as separate sheets and is somewhat more dens in roiled form than a single casting. Red Lead Protects Chicago Gas Holders T HE Peoples Gas Light and Coke * Company relies on red lead base paint to protect its seventeen gas holders in the Citv of Chicago. These holders, comprising both water seai and waterless tvpes. are a vital part ot an extensive gas distribution svstem containing approximate!v 3.700 miles of mains serving more than 910.000 customers. In addition to the initial two full coats of red lead paint applied after erection, the Peoples' holders recei\e touch-up coats of red lead primer ap proximated everv five vears as pan of the regular maintenance painting procedure. The ten million cubic foot waterless holder at Calumet was the latest to be repainted. All rusted areas of this 3.100 ton structure were thoroushiv wire brushed and received a touch-up coal of red lead base primer before the full coat of green finish paint was applied. Approximated 125 gallons of red lead paint wenrequired for this lob. The crown and top 30 feet of the shell was painted in orange and white checker board pat tern in accordance with Civil Aero nautics Authority Specification for daytime marking of tall structures. This or.inge paint is a basic lead chromate tvpe conforming to the re quirements of Federal Specification TT-P-56 i International Orange l. The Calumet holder, placed in ser vice in 1929. is one of four 10 million cubic feet holders now operated bv The Peoples Gas Light and Coke Companv which are surpassed onlv bv the 15 million cubic foot holder at North Shore Station. It is a 24 sided octa gonal waterless tvpe of standard de- Tuo <.>t the sexenteen red lead pro tecied ga^ holder< ot the Peoples Gas Light and Coke Co.. Chicago. sign w uh riveted construction). Latest design on this type oi holder uses all welded construction. Government ap proval is now being sought for con struction of a seventeen million cubic foot capacity waterless type holder at 1780 Marcey Street. Chicago. Con struction will proceed if and when proper authorization is secured. The Peoples Gas Light and Coke Company was incorporated in 1855 and began the manufacture and dis tribution of gas seven years later, iince 1907 the Company has been the only one supplying gas to the public in Chicago. Bv amendment to its charter, it has acquired the authority to manufacture and distribute gas for fuel purposes, to distribute natural gas. and to distribute gas in any terri tory annexed to the City of Chicago. Red lead base primers are used to protect gas holders in all sections of the country. A widely accepted for mula for this purpose is one contain ing seventy-five percent red lead arid twenty-live percent iron oxide m the pigmentation. This type of pigmen tation is usually used with a vehicle containing equal parts of synthetic resin (aikvd) and raw linseed oil. Primers of this type used with suitable finish paints assure economical long term protection in industrial environ ments, a particularly tough service condition for metal protective paints. Lead Has Variety of Uses In Long Island Development v "I WANT mv home to last a life- time''--is a sentiment echoed by nearly every new home owner. At the same time they want a home that will be a good financial investment, one that once built will require a mini mum of repair and maintenance. Maxwell Snedden. builder of "Wantagh Crest'' homes in Wantagn, Long Island has tried to provide just such assurances by using the best of construction materials coupled with fine architecture and careful workman ship. .And contributing its share to ward a safe and sound investment is lead. Lead bends, calking lead and lead shower pans guarantee a long life and trouble-free service. Leadcontain-"'-' exterior paints help beau tify _= *ell as protect the outside wood trim and other painted surfaces. anlagh Crest" is a development of 100 ranch style homes with at tached garages and full basements. Designed in a modern, comfortable stv le bv Mattern and \ork. architects, each home has three bedrooms and tw o baths, one with a tub and the other with a stall shower. The shower stall, a "luxury" fea ture usually found in more costly homes, is guarded for a lifetime from floor damage due to seeping water by a lead shower pan. The stall. 4 ft. 4 in. long and 2 ft. 6 in. wide, is lined with a sheet of 4-lb. lead. The upstand is about 6 in. with the corners folded in pig-ear fashion. Installation of a lead shower pan is very simple. First, the wooden floor ing or platform is examined to see that it is smooth and free from any pro jections such as nail heads that might One oi the mote than 100 attractive ranch style homes in "W antagh Crest," a Long Island. A . Y. development. injure the lead. It is good practice to line the platform next with ordinary tarred building paper to act as a cush ion for the lead which is then laid in. the sides dressed up against the walls and. if desired, nailed along the top edges to the studs. Then the pan is soldered to the drain pipe below the "weep" holes. The step that follows is one that is often inadveitentlv omitted--painting the lead with asphaltum. This is a particularly important step because the thin 'aver of asphaltum halts anv action on the lead bv free lime in the "green ' concrete which is poured on the pan as a base ft ' the tile. "Cured" concrete has no effect on lead, but un til all the free lime is converted to carbonate, lead in direct contact with concrete may react chemically. The best insurance against this possibility is to paint the lead with a water-proof ing material such as asphaltum and thus protect it until the concrete is thoroughly cured. A further guarantee of continued satisfaction with the lead in the plumbing system at "Wantagn Crest" is that the 200 lead bends used in the development are stamped with the Lead Industries Association "Seal of Approv al. ' This means that the bends have been carefully manufactured and contorm to the rigid mechanical, di mensional and chemical specifications established bv the Lead Industries As sociation. All of the lead work was done "on the job." bv JK Heating Company, Amitwiile. Long Island. New York. Lead always plavs an important part in the modern plumbing system. It is flexible and able to "give" with out fracturing as the house settles, it is corrosion-proof and unaffected bv the variety of corrosive liquids and gases to vvhich plumbing is custo marily subjected. Furthermore, when piumbing is inaccessible, when it must be depended upon to give a lifetime of service without repairs and w ithnut having to tear part of the house dow n. lead is always preferred. 6-- -- I A 25992 < Bonded and Cast Lead Featured In New Vacuum Filters HE separation of solids from fluids acid is the filtrate, the filter is built Tis encountered in most chemical using either bonded lead lining i lead processing using equipment ranging bonded to steel i or cast hard lead irom simple laboratory funnel and wherever the corrosive is encountered. paper to complex industrial filter This is how the rotarv vacuum drum presses. One of the newer develop filter works: A horizontal cylinder, ments in industrial filtration is the sealed at both ends, is designed so that ' ontinuous type rotary drum cake sections beneath its surface may be fitter. Several varieties of this type evacuated. The surface consists of are on the market, differing chiefly in screen cioth or perforated piates cov the method of removing the filter cake ered bv filter cioth or other fluid per and the materials of construction used. meable material. The drum is rotated Almost invariably when sulphuric through the mixture to Pe filtered C (instruction details ol a continuous type rotary drum cake User, one or :ne newer developments in mdustriai nitration rnanutactured by Filtration Engineers, Inc., A ewark. .V. J. RLTBiNG OUTLET TO VACUUM SYSTEM where it picks up a "cake'' or layer of solids while at the same time draw me the liquid filtrate into evacuated drainage lines. The filter cake mav then be blown, scraped or pulled from the drum. The string-discharge type filter manufactured bv Filtration En gineers Inc. of Newark, New Jersey, employs a set of circumferential cords wound around the drum beneath the cake which automatically pull off the cake as the drum rotates. Rotarv vacuum drum filters are available in diameters ranging from 1 to 14 ft. and in face widths from 6 in. to 20 ft. The filter shown in the draw ing used lor filtering nickel siurrv irom a sulphuric acid solution is 6 ft :n diameter and 6 ft. long and is con structed of steel bonded with 5 32 in. ot lead ori ail exterior surlaces of the drum shei! and ends. A laver of lead o 1- m. thick is equivalent In thick ness to 10-lb. sheet lead. The drain age member Iv mg ;n each drainage tompartment on the face of the filter drum is made of cast antimoniai lead. The filter cloth is fastened bv calking cord made of cotton or synthetic fiber w hich is wed gea into grooves made of antimoniai lead. Inside the drum, the drainage lines for carrying off the acid filtrate are made of lead pipe held m position by steel supports. head piping and valves are gener ally used to conduct the corrosive mixture to the filter and to carry aw av :he corrosive filtrate. Vote the cast hard lead valves, lead pipe and lead -toe- Lett Lead drainage pipes in a rotary arum dier hr clarifying a sulphuric acta hrigntening <oiunon. Right J. Swenson -otars arum : i i ; ( equipped with lead iniet ana outlet piping and leaa laiies. lined pipe used with the Swenson lead-protected rotarv drum filter illus trated. This installation is used for separating sodium sulphate from a viscose ravon spinning bath. The tank in which the filter drum rotates and which contains the corro sive slurry is constructed of steei plate bonded with 5 32 in. lead. The filter vaive. packing rings and valve ring are cast from antimonial lead. Dis charge and return rolls for controlling the discharge string as weil as the belt rolls are also made ot steei bonded with 5 32 in. lead. tics of steel is to specify a bonded lead lining. Bonded iead or "homogene ous'' lead lining is a fabricating tech nique that is finding increasingly wider acceptance in industry today. because it can best cope with the higher operating temperatures and pressures plus corrosive conditions so often encountered in modern chemical engineering practice. Thf following articles me rjgrtnts contain information drawings and soKifications an the use of lead product! heiofui to architects, engineers ang others m the construction industry They are annaOie. free of charge, ugon request !c the Liao Industries Association. -120 Lutmgton Aenue. New vorj 1^7 14 y The 3 ft. bv o it. rotarv drum filter manufactured bv 01i\er Lmted Fil ters. Inc., is used tor clarifying a sul phuric acid brightening solution in a large Dialing shop. The steel tank is entirely iead lined inside and the drum sheil and heads are Donded with 14 in. of lead. The filtering screens are discs of cast 6 percent antimonial lead as is the 1134 ln- diameter iead valve. Drainage pipes as illustrated are chemical iead 15 16 in. I.D. and 1-3 16 in O.D. hiuice pipes are aiso of iead. The discharge piate is lead and the steei receiver is lead lined. Division strips are lead bars. (.omplex and wel 1-engineered units, rotarv drum vacuum filters such as those described above must operate under conditions corrosive to most metais and also must have sufficient strength to support the weight of the filtering area. Corrosion, which can be a serious and certainly expensive problem has been solved bv using lead as the corrosion resistant material. The modern method of combining the long-established corrosion resistance of lead with the strength characters- THE l SE OF LEAD IN TRE PI LP AND PAPER INDl s t r \ Detailed description of variout iDpucsiioni ot eaO id the mnoern j u i* iod barer mil! C.yver? ail ?0e* of paper ouic man u: ar t u-r and treatment meiudioe auipbne and manuiacture. acid pu;DiD{. bleaching and nock banniinc Reprinted from "Paper Trade Journal " Oct 26. 19.V) LEAD IN MODERN Pl.l MBIN'C -- tt'HV, THERE HOW IT I* 1 ED A 24 page booaie' -ontaininc oe'cnplive ctorma ion as we 1! a? f"ur page* of detailed jrinop for plumping msta iiation* in inoui trpe bouses. METAL PROTECTIVE RED LEAD PAINTS The versatility ni -e d iraa ,r. proteriive primers to meet a wide ranee nf `ur'irr 'ontunon- crTtna KOeduies aod economic ortnina' u describee Reprinted from "Pnat ana a r c 10 Production January. 1951. A STUDY OP PAINTS FOR ENCLOSED STRUCTURAL MEMBERS IN STEEL HOUSING CONSTRICTION A reprint of 1 paper which *ai read before the iDenerai Meeting of the American Iron and Steel Imtitute 51 ay 15-26. 19 4 5. *n!ch ipomored the *ort The itudy included tome 34 tlcdi at paint lyiumi AN INVESTIGATION OE PRIMERS FOR MARIVE ATMOSPHERIC ENVIRONMENTS Reiulti of an lnreiugiuon of lynthetlc 'ehlciei and red lead mixed pigment pnmeri orer an eipoiura period of three and one-half rears :n 1 rirorou* marine aUDOtpnere Reprinted from `'Official Diien publlibed by The Federation of Paint and Varaiab Production Club* RED LEAD TECHNICAL LETTERS A ene of technical letteri mued by the Red Lead Dlriiion. !>ead Induitriea Ariociation The numperi and Utlei follow tAtailable aeoarately 1 Teehnieal Letter No. 3 --Red Lead Primer* for Atmoaphene Eapoture Teehnieal Letter No. A--Red Lad Painia for Marine Eipoaum Teehnieal Letter No. 5--Red Lead-VInri and Conmaroot Type Paiota NET MARINE PRIMERS .\ n artirre in newix JeceiorrC paint primer* 'nr tnetau erpoteo to marine atmoapnerei written *1 p*e;T for the oe-inr. wr 1 no: a paint tecnnoiom: Repr-nted '-art Marine Erg: peer : n* and Shipping Renew 51 arm 13 4^- PHYSICAL AND CORROSION CHAR A (TER I ' - TICS OF LEAD IN THE. CHEMICAL INDUSTRY A detailed dttcunion of 'he ue of `rad !n the -nerr- ci uviuiirr presented before tie National .4 unci *uor of Ccrrouon Engineeri Conference Apr:; .ju MT DEA ELOPMENTs EXPvND LEAD CONSTRf r T I o \ 'rrpri-rve'rieri'j ; n : e a d Ap - a:: r j*r jevritiea and C u print from 'Material i "--p;. So eo E Of CORROSION FORUM A tenet o' one page irtiriei or r.e jie of ,, , material of -heir, cons: rut t. O'' r * 'allowing cnemirait available lerarate". 1 Hydrochloric Add H'drortuoric vnd ir.Kwtri a i. -hoi Sulphuric Arid Sodium ^.pm.' , ..-i, Pbr>*oboric And. (.bromic Ac o J ' 5. p e Arid. Reprinted from f'hemirat Erinneer:r.s FEDERAL SPECIFICATION TT.p.q^j Foe Pipe. Bend* and Trap* LEAD Part 5 of Section IV of the Ft-.'era. Star, taro* t acaiog. official pudltcatlon b\ the Government f'riot Q ( 0 ffire FEDERAL SPECIFICATION TT-P-86. Pa>nt; Red Uad-Bate, R e j tl M t ie*i 'Doreri fou* trpe of red ,ead hate p:r;j innv, t-., faat dmr.g fortr.u ia Horn 51anv rnen.ded ipp 1; r a:: r.m lilted. LEAD WELDING Ah ..-.formative n well n practin, guide to etd weidir.g Reprict-ed 'rom the <Ve din* :Iand:>rxil "bird Edition ' publlihed by the American 'A e din* >oc: e t y ETON KEQI E>T. THE LEAD INDl STKIKS .ASSOCIATION \\ ILL I IE (.LA I) TO 5! AIL '! t. AD' R EC. I L A H L\ . TREE. oE ( IIAHU. TO T H O E INTEREn TED. A M) A\ ILL (OOPEKATE WITHOUT OBLIGATION IN THE SOLIT10N OE 'lOIR LEAD PROIJI.E'B i / tQCu