Document ZB7rBoNrMMBDjMGgQEMEZdKR8

Underground pweRne tunnel built In 1924. WlKontln Steel Workt, Intemollonel Herretter Company, CMcogo, IIlfnoli. \ 24-Hour Strength in bitter cold weather 24-Year Service in power-line tunnel provided by LUMNITE STRUCTURAL CONCRETE It was 16 degrees below zero when work men placed LUMNITE concrete in the forms for this underground power-line tunnel back in 1924. But despite the be low-freezing temperature, LUMNITE gained full-working strength within 24 hours. Today it's in excellent condition and continues to give strong, durable service after 24 years! Cold-weather concrete construction is facilitated by use of LUMNITE. Strong, durable concrete can be made in freezing weather, overnight, with a minimum of protection and without the use of artifi dal heat. LUMNITE, a calcium alununate cement, generates its own heat to allow normal hardening. And its high 24-hour strength permits rapid maintenance jobs. Besides its overnight structural advan tages, LUMNITE'S adaptability and utility also serve modern power plants as Refractory, Heat- and Corrosion-resis tant Concretes. LUMNITE liningB for stacks, flues, coal bunkers and ash-pits provide smooth jointless surfaces, result ing in less resistance to flow of gases and less abrasive wear. cer further information, write to: Lumnite Division UNIVERSAL ATLAS CEMENT COMPANY VNlllO ITAII) licit (OUOItllON IUIIIPIAIV . 135 BAST 42nd STREET t NEW YORK 17, N. Y. _ "TUB THBATRB GUILD ON THB AIR"--Sponsored by U. S. Stttl SubsJdiaties--SunJay Ev*ttin[s A BC Ntfsnrb 2S1 POWIR Docoml*' with the Permutit Sludge Blanket Hot Process! hading paper plant installed a Permutit Sludge (hnket Hot Process water softener. Silica was nluced to 1/5 the amount previously obtained Jthtt conventional type softener. By feeding more kinesis, the silica content could be reduced >less than 1 ppm. The plant's estimated annual rtngs on treating chemicals exceeded $6,000. Besides lowered chemical costs, the Permutit Hot Process brings you many extra advantoges: More efficient use of magnesia! Lower turbidity In settling tank effluents! Longer filter runs! Creatcr adaptability to fluctuations in flow rates! Easier operation! This is another of Permutlt's great achievements In the water conditioning field. AM***'1" Llnl, 8oJ il|,i Blloonn'V**.*t ''"mco ttimnoo"'"2 . Itrtii Hyf,o4t,ombWt<> -1'* . jjjoollxoOo'' Remo-0 W ' b Rimom' S'",0n .uColBPrccIP'^ooi Sim."' Boo0"1'' , see. `"-r!:-- CHARACTERISTICS Silica In raw water, at SIOt ppm Silica In effluent, as SIOt ppm MgO feed, ppm Parts.SlOs removed per part MgO . Average retention time of Mg(OH)t In hours Contact time of water with Mft(OH), In minutes Hardness of effluent, as CaCO* ppm Average toad on softener, % rated capacity Temperature In softener 55 u 76 0.6 4.7 92 21 65 220* F 55 *.o 59 1.1 100 87 15 46 243* F Writ# for full Information to the Permutit Company, Dept. P-I2i 330 West 42nd Street, New York IS. N. Y., or to the Permutit Company of Canada, Ltd., Montreal. \&r.Xy i-.v.v; M' a