Document pB62rpxgZJpypwpxRXYeZpJ26

Jims 7 15S39 Captain E, L Bergquist Station Hosptialj, Air Corps Advanced Plying 'cliool, Kelly field, Texas* Dear Captain Bergquistj I have your letter of June 3rd mid will endeavor `to answer your questions to the best of z t j ability, 1 ETHYL FLUID contains tetraethyl lead and aa organic iialxd (in the avaition fluid tit halid is thyXensdibroisi&* and the propcsrtion of tetraethyl lead to othylss0 -*ait.roaid is that theoretically required for complete Gosbinatlom to fora lead bromid)* in the ocaabustiaa* it is boliaved that the tetraethyl lead turns to lead oxide and the halids to acid* these tssr then combining to form lead halid*, This material is largely volatil-. ized opt of the cylinder itssif and is partially deposited in the exhaust system and partially 'blows ant with the exhaust gases - 2 There is no evident? that there .is any material difference in th chemical reactions in th fuel between airfeaBsobils motors and air* . plane motors# 3* Tetraethyl lead is oxtreasly easily oxidised and 1 do not believe that there is ary possibility 'that tufinawd tetraethyl lead con cons Q\xb of th cylinders* 4* Th experimental dotemina^iaa of the quantity of lead in exhaust gasss ds^xiremely difficult sine* at leeust* a part of .the load Is thon^very finely divided solid state which permits it to pass through most scrubbing systems An. electrical precipitator of th Cottrell type would probably be most effective 1 am sending you under separate cover, a report of the Bureau of Hines in which some work m s dans on '11118 problem and also a report of the British Investigating Committee in which th problem is discussed Th concensus of opinion appears to bo that if exhaust gas is diluted to the point Tiber poisoning from carbon monoxide does not occur, the lead concen tration is well below th limit believed to produe* any physiological effects HE 0015539 Cap* 1 Bergquist 7-eily Field* Texas - 2- Juaa 7, 1933 The problem; of the relation of tetraethyl lead to the publto health question has "been esmauatSrrely studied "by Dr E* A* Eehoe of the College of l.!edlois!fi|i University of Cimiimati,and I "would suggest that you Tjrite to liisa if you Imvo further spooifi questions Very truly yours. Graham Edgar Zfl Copy to Dr* Eehoe Kir 0035540