Roth lead and of the fine sediment structure.

October 14. 195 P.

GALVANIZED IRON PRIMER White...................... 3.95 3.76 BARN AND ROOF PAINTS CAMPBELL QUALITY BARN AND ROOF PAINT Red............................................................... 5'* per l*a **' pd. each each $2.45 $2.55 $ .80 Gray......................'............................ 3.60 3.70 t.09 LIQUID RED LEAD {Modified) TINNERS' PAINTS Light Red, Dark Red........................

K r 0014912 V LEAD INDUSTRIES ASSOCIATION 420 Lexin gt on Aven u e New York 17, N.

It wa3 the consensus of the Committee that such a trip could lead to a greater exchange of information between the two countries, such as information regarding toxicology, etc.

Since Epons are known to react with alkali at high temperatures with consequent increases in melting point and weight per epoxide equiva lent, there is a strong possibility that excessive mixing of the Adhesives at elevated temperatures may lead to a viscosity increase.

Som e of th e ch an ges p r o p o se d fo r th e r e p o r t can b e st be d e sc r ib e d as of a public r elatio n s n atu re sin ce th ey ar e in ten ded to in dicate th at the sam e am oun t of lead w ill u ltim ately reach the atm osp h ere r e gar d le ss of the lead alk y l p laced in the gaso lin e tan k.

Typical examples are the fumes from burning lead or the zinc oxide produced from zinc vapor.

A* Hirschler Date: May 18, 1955 Summary Trends over the past twenty-five years indicate that the refining in dustry will continue to increase the octane number of marketed gasolines, and that these increases will be utilized quickly by car manufacturers in raising engine compression ratios to improve engine efficiency* An increase in the maximum allowable TEL concentration from 3 to k ml/gallon, with a corresponding increase in average actual TEL concentra tions from 2*23 ml/gallon at present to 3*23 ml/gallon, would lead to an increase of about 1*9 in the Research octane number of average gasoline* If this increase were to be accomplished by refinery operation rather than by the use of additional TEL, the production of the same amount of gasoline would require about 2% more crude oil* An increase of 1*9 octane number in the rating of commercially-available gasolines would be expected to lead to an average increase in engine compression ratio of 0*3 ratio.

dwioht p.jovc* mki iocnt THE OLIODCN COMPANY 1396 UNION COMMENCE 6UILOINO CLEVELAND M.OHIO January 14, 1952 Dear Mr.

c/ NO. 3 MAXIMUM PERMISSIBLE CONCENTRATIONS OF ATMOSPHERIC CONTAMINANTS IN PLACES OF EMPLOYMENT Effective December 1, 1957 (Supersedes American Conference of Governmental Industrial Hygienists Threshold Limit Values for 1956-- April 1957) CONSULT LOCAL HEALTH DEPARTMENTS AND PHYSICIANS .

Shell insulation shall be suitably flashed with lead or aluminum flashing to prevent moisture entering the insulation at openings, structural connections, or at the eaves.

. - ICareh 15-15, 1950* a niATIKO DSRARttgKHT A study of dost sources st the looms ess facilitated by use of s strong light, and disclosed the principal sources to be at the harness, both shore end below the werp threads* Za addition, some dust originates st these threeds la front of the harness, between it and the ley beam, although materially less than at the former two locations* The major sources of dust can be controlled by installation of an sxhauat hood in the form of a narrow slot running the width of the loom, just behind the harness* It is estimated that control of dust shore the warp would be effected by an exhaust rate of 75 cubic feet of air per minute per foot of loom width* The same exhaust rata la contemplated through similar exhaust slot disposed below the warp threads in a position symmetrical (in relation to the plans of the wurp threeds) to that of the upper hood* It appears that there will be considerable difficulty in leading a 5-inoh duet into the space below the warp to communicate with the exhaust slot.

This is not possible and leads instead to the formation of a so called asbestos body..

An increase in the maximum allowable TEL concentration from 3 to 1+ ml/gallon, with a corresponding increase in average actual TEL concentra tions from 2*23 ml/gallon at present to 3.23 ml/gallon, would lead to an increase of about 1*9 in the Research octane number of average gasoline.