Every effort is made to lead ventilation ducts so that they do not pass through such structures.

The air volume should be sufficient to maintain a velocity of not less than 100 fpm over the open area of the booth (150 fpm is preferable where benzol or lead is present in the paint) and the vapors should be discharged through a suitable stack to permit dilution.

These entailed analyses of the regular run of substances such as silica. asbestos, lead, manganese, mercury, fluorine, acids, solvents, hydrocarbons. etc. ffnme Dfftr-a Tnapeot^ona Studies are being conducted in the Home Office Divisions where I.B.M.

TECHNICAL BRIEFS ENGINEERING DEVELOPMENTS HERE AND^ ABROAD DIGESTED FOR BUSY POWER MEN REVIEWED IN THIS ISSU.E FEEDWATER Soaw Practical Aipect* of Deionisation With loa-iitfiaog* Retloi STATION CONTROL, COSTS Emergency Central el System lead Steam-Station Cost Survey a U. ).

ralus Lead) 070 636 85 338 17 31 l * A Uthsrcs 7,712 11,360 13,371 15,388 13,595 14,019 !

Pepperdine 6, ley and Branham, gave the Occidental 40, Cal Poly of San mum Sim a two-run lead [Dimas 0, Oklahoma A & M. 27, arey added their -marker !

., is one of America's leading independent testing and research laboratories.

Toxic Dust Type Respirators are approved for protection against inhalation of toxic or piosonous dusts, such as lead, cadmium, arsenic, chromium, manganese, selenium, vanadium and their compounds.

I attempted to cover this situation reasonably well by collecting together the pertinent information on the subject in a book, of which, I trust, you have a copy, entitled "Lead Studies."

Instantaneous Heat Load, Sensible and Latent(1) Lead from sojar radiation, sky radiation and from outdoor-indoor temperature differential for glass areas and exterior,: walls and roofs, modified by periodic heat flow or lag factors depending on the type of structure. (2) Load due to heat gain through interior partitions,: ceilings ..and floors.; (3) Load due to ventilation either natural or mechanical. (4) Load due to heat sources within the conditioned space such as people, lights, power equipment and appliances

Whit# It Colon Sh e r w in Wil l ia ms Pur Lead& Zir SWP HOUSE PAINT srgr $3.45 gal.

Hydrogen sulfide, if present, will react with the liberated iodine as follows: : H3 + I*--77-*HI + S Hence one volume of hydrogen sulfide reduces the apparent oxygen content by one- . half volume and, if appreciable hydrogen sulfide is present, it should first be removed by passing the sample through lead acetate solution.

Ducts leading into the fan room or from the fan, should be - acoustically treated on the interior and in special cases, should be pro vided with sound traps or filters.

Lead poisoning was recognized but we were ineffective in eliminating its danger and as a matter of fact not very excited.

Myocardial infarction and occupational exposure to motor exhaust, other combustion products, organic solvents, lead and dynamite -- a population-based case-referent study (SHEEP).