[ RjpHOOUCEP AT the RATIONAL ARCHIVES!

March 8, 1948 Dx*.

December 2, 1943 Dr.

3j&m 1ImdtaMtriAssatmm CLINTON H.

January 18# 1944 19 Dr.

November IT, 1942. '" N ' \\ .

Ma r y l a n d Ca s u a l t y Co mp a n y STEWART MCDONALD, CHAIRMAN DP THE BOARD EDWARD J .

Lead I ndustriesA**oc;mt!

copy ZRICH FIRE INSURANCE COrTANY OF NEW YORK 135 South L aS alle S tre e t, Chicago, 111.

FED ERAL SECU RITY AGENCY U.

0 p Y Sales Department PHILLIPS PETROLEUMCOMPANY BARTLESVILLE, OKLAHOMA April 21, 1949 Director United States Public Health Service Washington, D.

ETHYL CORPORATION I N T E R -OFF IC E CORRESPONDENCE t o Robert A.

Res ea r c h l a b o r a t o r i es Di v i s i o n GEN ERA L M O T O RS CO RPO RA T IO N POST OFFICE BOX 188, NORTH END STATION D ET RO IT 2, M IC H IG A N July 7, 1949 Dr* R*| A* Kehoe Collets of Medicine Univeijsity of Cincinnati Eden Avenue Cincinnati 19, Ohio ~ Dear ^ob: Your opinion on a matter pertaining to lead intoxication would be very welcome* Questions regarding the effects of small changes in the composition of lead solder (between 2 and 1Q$ tin up to 1% arsenic or antimony and 90$ or more lead) have been raised by some of our executives* In your opinion could these small changes, especially the reduction of the tin content to less than 1Q$ be related to an increase in the absorption of solder dust into the human system possibly due t<j> greater solubility, scalier particle size, or other phenomena* Do you think that research into this phase of the subject would be warranted in seeking an explanation of an increase in either blood or urinary leads or symptoms of intoxication in persons engaged in soldejr application and solder removal.

BOARD OF DIRECTORS MEETING New York, N.Y.

New York, N.Y.