May 5, 1948 DBN50earwr.dHYCaHvo.eranRkl.lAC,BviBteiyconxku5ee12r,t8.o4n, Blackburn, Dear Doctor BlackburnJ aaNfdoIhcIhtttouanhsaaaifosynlvvgthhivckusmeeataeeorbrvvmctuyuemwaehreeacbeirheseniiagmdarfgertrggeoanwh.eh,aaerr2tlodncdyiilt3rhbdoeueakbIo,deesfyeetudcmabdIorirmaadyaefueiyaoohsthpet,eehauniatttnnlaoaevoayddwwsetortrhsorfoieuawmynsptjutwutoythreehlahedautroeosyhhyadnet,ueedosayhdrrdapauoratrshonvpubeos,pdeeoislclonusiahtucshmtnbionaatstfdepvatpestilheoeirbtpeoneyaerhfloenovIaeerpNnffuvvli,tieoaeeolseounywwenbiuhftnrelhusailiiYaolotttsytnlyoyodanhflo-gonfIe,rbednbygpknudoweooosirdvselhlfefuieeasyersvraedmmtgetnte,laepniryl,uinymnbyllgtiyysboIutethilrgeu,ttttikifsitlpaoanumtbiihltnnsodhesyltaeawuemeseslworlttytrlltmooeewefrhmadIul,.tahneNitsceatenedmeahetkrtwneyterhaedtoaty.teahoYapsurrnlethookhdymgoIIairnnoavnfekaueyettt. ar ' Cordially yours, FAX ef Robert A.

* April l1!

& v i .

V S ears,R o eb u ck and Co.

February 12, 1943 Dr.

ETHYL CORPORATION INTER - OFFICE CORRESPONDENCE t o Dr.

ETHYL CORPORATION INTER-OFFICE CORRESPONDENCE TO Miss Emma Fortlage ADDRESS Cincinnati FROM SUBJECT Miss Justine T.

June 16, 1945 Mr.

October 24, 1942 Col. 0.

LTD 45-57 December 14, 1945 DBTBS.iCEmyiQH OF LEAD BY DI5H1SQM A Critical Comparison of the Methods Described In LTD 42=5 and DSM 44-188 PURPOSE (1) To evaluate certain factors in the "mixed-color" method for lead given in LTD 42-5 (2) To compare this method with the "one-color55 method described in DSM 44-188. (3) To check the sulfite reduction method, given in DSM 45=39, for the removal of Iodine from the solutions obtained in the determination of TSL in air.

THE ASSOCIATED ETHYL COMPANY LIMITED LONDON REGULATIONS GOVERNING TEE CLEANING & REPAIRING OF STORAGE TANKS WHICH HAVE CONTAINED LEADED GASOLINE Date of Issue ; November 1945.

March 18, 1946 M r .

March pi, 1948 Dr.

OFFICE OF THE DIRECTOR I^ABORATtt'OSIES OF THE a i^nt ic cnrs"isosipst t as.

129 Betiro Way San Prancisco, California January 14, 1946 Sobert A.