Jan u ar y 3 * 194 Mr.

July 9$ tm B1S1ra*0v7aJnoBnhaunhl*lEG*stefroreraegitia Dear Doctor traint umhtestscsohhhaaelorfiuomeniavnlnwddlbtepsi*eelnHgirlotedarhofaIttaeldrhehsmlro*hmtaaatmoshasbttowanilnnnfeyttpeathohdkdhoelyserqiurs*0Itsiurhnlrt*iais0eopptnr3lIaeaemtus5attiraritita*deemyqilnnntuhieiIcottlinelWotfied1hwsngaiailrttivmeshesajaihunmpddnttslhusetotvoewiaitsfssplihsieraetao*ehwbrwbprsiene1oleoenf0dsrrhb0utthewet0lodetg*tiosb0rttahha1lepmoanyoaaianonosnystsddut Very truly yours* K&Ksis RoBerfc.iWKehloe* M*D*

" s * *5 ?

// On the Effects of Exposure to the Dust of Eagle-Picher Insulating ' Material by i Robert A.

000830o

Ma y 1 ^ , 19l g .

Professor Dr* G, Herman Sieveking Rothenbaumchausaee Hr* 211 Hamburg 13 Germany Dear Doctor Sievokingj It was a pleasure to hear from you some time ago and I have been somewhat tardy in replying by reason of the press of many things de manding my attention* I seem to be in a rush even when I am traveling outside this country* and X am sorry that I have never had the opportunity to talk with you about the many aspects of our mutual problems* I am very much interested in the work which you mentioned on methods of determining the lead content of urine* and I should be very glad to hear of your results* vie shall maintain as close contact as we can with Dr* Helntzman in Leuna who 13 also woiicing on lead methods* We shall both check back and forth on cergain samples so as to determine the comparability of our methods* I believe you will find that some modification of the Fischer Leopoldl Hdithis one" method will be found to be most suitable for the analysis of urine* unless one has spectrograph 1c equipment available* With the dithizone method one may use small samples of urine and obtain quite accurate results* I do not know how much experience you have had with the various methods* but I think it is perhaps worth while to caution you against the use of methods which have not been very carefully checked against small known quantities of lead* X say this only because quite a large number of mispleading results heve been published from laboratories in this country in which not too critically tested methods hay been employed* Moreover the diagnostic interpretation which has been put on many of the results has often been unjustified* I think you will find a fairly adequate discussion of most of our problems in relation to tetraethyl lead and leaded gasolines in the book which I have sent you* I find that the moat frequent cause of misunderstanding is in relation to the handling of gasoline* After fairly large experience and rather critical observa tions# we have come to the conclusion that there are no HE 0013525 which the gasoline has been stored for considerable periods of tine.

7 ~ ./ ~\ - y - E.

*<&au.

A u s t i n Ev a n s ,M.D.

LABORATORY OF APPLIED PHYSIOLOGY UNIVERSITY OF CINCINNATI c o l l e g e o f me d icin e GENERAL HOSPITAL March 1, 19^0 Miss 1202 Lakeside Avenue Akron, Ohio Dear Miss Lemmon: We have been asked by the Ohio Industrial Commission to examine you for purposes of diagnosis and determination of present state of disability and are writing to ask that you come to the address below on Monday, March 11, 19^0, some time in the morning.

i 1 S h e l l O il C o m p a n y J !

SH' ;>f.

E.

'ISVIH'.Off .