surface arrangement to reduce deposi tion of chemical solids end facilitate removal of solids that are deposited.

TECHNICAL BRIEFS ENGINEERING DEVELOPMENTS HCR| ABROAD OIGESTED FOR BUSY POWER , REVIEWED IN THIS ISSUE VALVES AND PIPES Volva Chorocterivtki and Proem Control Liquid Flow Chorocteriif kl of 0 Pipvlin* and e Control Voir* Control-VoNe Body Datign OIL USES Fuel Oil in the Steel Industry MainttnoiKO of Clectrkal Oil* Oil Clerilkatlan in Steal Plante High-Temperature Lubrkonti Soaring Soali RUST PREVENTION Rutt Preventives Maintain Steel Water Wortu Maintenance ` "Dlraethns lor ordering papers art given an poge iJO" Opm ter pipe vetociry Cqwlvaient leet at pipe LiQvtd npv Porter* Pressure Ortp eerast H-0 SOOOvwve M+t* n>p)i ju AW torwafes vn 4*n0 #w one * ppm t Mm Stot9P/+c ***** errawv qv from .

T -Lri ok RECTANGULAR OPEN STEEL FLOORING Tri-Lok etrength la obtained by trust action through twisted crow-bar, curved In opposite directions at each bearing-bar.

SEARCHLIGHT SECTION 314 SEARCHLIGHT SECTIOH SLIP RING MOTORS t*t. 400 100 ISO ISO ISO 100 100 100 15 75 75 75 10 40 flip rliq Matan tefcolli Mete Up* Ipserf DtutlpUaa ci.

lUllDOZIB mount'd on a trowltr tractor ICBAPIB with rwbbur-tlrod prtm^ ntavtr INOUITBIAl LIFT TBUCK li tomotlmoi uaod In mm It plant* to transfer coal dtroctly tram outdoor *torafla to firing unit* Use of mobile equipment for coal stockpiling has grown enormously in the past 10 years.

FORM191 &rTSSJT9XgJ3>OlLCOSIPSY.

C O L U S P.

OFFICE OF THE DIRECTOR I^ABORATtt'OSIES OF THE a i^nt ic cnrs"isosipst t as.

P * 0 7 7 s* 4ft t s e Kw.

ROBERT W.

W illard St o r age Bat t er y Coitvpctriy MAIN OFFICE AND FACTORY 2 4 6 -S8 6 E.I 3 I STST, Cleveland., Ohio Feb. 14, 1945 Robert A.

March 28, 1947 Mr.

March 27, 1942 Robert A.

AMERICAN SMELTING AND REFIN I FEDERAL PLANT L.

August 19, 1948 Dr.