Yonkers Laboratory I KE 0017017 Int er -Office Cor r espondence Et hyl Gasol ine Corporat ion 25 Br oadway N ew Y ork June 22, 1928 Dr.

June 23, 1S7G Mies Nell Conway 600 West Orange Grove Road Tucson, Arizona 35704 Dear Nell: As I told you in ray letter of April 0, J wrote to friends of mine - technical men ia the Detroit Laboratory of Ithyl Corporation, who would be most concerned in,the means of clearing the air of exhausted substances from the tailpipes of automobiles.

November 5* 1248 Mr.

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oniiOEA-iBUM ClIh h u ib CE u l fh i:H> li.A .Keh o e Db fHZDAY, Alii XL S , lb 56 to o * Calin gu ert i --1;5- wO o.o: ;;r .

EOOORE W NEUMANN.

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Question: I would like to ask a question not on tetraethyl lead.

S AF E TY COMMITTEE OH.

c o r r espo ndenc e ROM O - 0 - C1 B, 7 Moore Philadelphia C.

December l6, 10t-l Dr, Degnar 2, iies3 35if Metropolitan Building Denver, Colorado Dear Jao!

May 2 , 19^0 Mr.

:>ao 'aulo, Kpnx axst , i;o o .

(a) To letamino tho magnitudo of the health hazard arising from the use of leaded gasoline for fuel in the flro unit: and secondarily, (Is) To do terraSri tho effective length of iff of tho filter discs'used to remove the load. 77. tor.clesions .p7 I. do -health hazard exixsts frora the breathing of load in air w:.on toe atovo is operated in re cam or oncluauroe under norra&l conditions of ventilation. :.rea.ll amounts of load scape through the ;jrner. a emu11 port Ion of tills Xoiud will be deposited on the surface of cool cooking recoptaeloc while tho remaliiacr will scape into the air.

''o : J r .