MADI SON 3 * 2 9 6 5 May 25, 1960 I N D USTRI AL TOXI COLOGY PLAN T SU RV EY Robert Kehoe, M.D* Kettering Laboratory University of Cincinnati Cincinnati, Ohio Dear Bob, ' Amidst the turmoil of reading galley-proof, preparing a pap'er for the June convention of the Association of American Battery Manufactures, my report to the Section on Preventive Medicine and other lesser obligations, I have neglected to acknowledge your detailed reply to me regarding tetramethyl lead* Not only did I appreciate the information you gave me but I am extremely grateful for the time you spent in going into the background of the investigation of TML.

September 3, 1964 Professor Sir Alan Moncrieff Institute of Child Health The Hospital for Sick Children Great Ormond Street London, W.C. 1, England Dear Sir Alan: Please accept my thanks for your reply to my letter of some weeks ago, concerning lead poisoning.

An equivalence between this method and the impinger which we developed from ashestos study data leads us to believe that fiber concentra tions of about 50 total fibers/cc or 30 fibers/cc greater than 5 ji are near the present TLV.

Kirby Ad d r e s s Bat on Rouge D a t e N o v e m b e r 1, 1968 D e a r Bob: I r e ce iv e d the p r o g r e ss r e p o r t on lead in air t h r e s h olds, togeth er with your cover letter .

National Lead Company Wyandotte Chemicals Corporation m zLiozz ---------I .

Copy of your letter of August 12 and also the booklet entitled, "Methods for Determining Lead in Air and in Biological Materials" were sent to Tsumeb.

imwm m*w imiijuji.il.Lwiimp--i' v LIA14167 ritasadl i * LEAD ETOZDB AMD SAJTTT KJLUTX1 Vo. 171 Tot All Meefeers of th* load Industrie* Association, Znc. fisi President Johnson's Air Pollution Mt>u|t to Congress January 30. 1967 Wn-- wi Mtt Mi^a h mm * UM ffiyfate . . . i^| for the registration of all fuel additive* with the Secretary of Baalth, Education and Welfare. following 1* that portion of tbs message, quoted la lta entirety!

Dear Harold: I am sending three copies of an Interim Report on the results to date of an investigation of the potential hazards of exposure to lead in connection with the use of tetramethyllead.

I am sure that he would consider Fellowship in APHA to be advantageous in his work (for Lead Industries Association), and I sympathize, in a degree, with his wish to have such standing.

Kehoe Kettering Laboratory College of Medicine University of Cincinnati Eden and Bethesda Avenue Cincinnati, Ohio 45219 Re: The Fate of Inhaled Particulate Lead Compounds Dear Dr.

Dear Harold: I am sending three copies of an Interim Report on the results to date of an investigation of the potential hazards of exposure to lead in connection with the use of tetramethyllead.

He has become impressed with the increasing amount of lead in the water from his studies of snow and ice.

.<* Lithopane J3< Leaded Zina T items B Whiting Asbestine 216. 6.0 216. 64 72. 2.0 166. 64 216. 9*1 VEHICLE* 39.OPS Saw Linseed Oil Bodied Oil Naphtha Drier CALCULATED YIELD MANUFACTURING LOW Jt ACTUAL YIELD 303 Jt 59.9 1^5 394 H16^ 39.0 .171 7.3 23.0 5.8' 103.0 3.0 100.0 UNIT COST________ TOTAL COST 6.36 Cwt. 6.89 * 5.87 * 5?

PUBLICATIONS 1964 Natural Occurrence of Lead. deTreville, R.T.P.

I write primarily to call your attention to the fact that we do not accept for analysis, samples for lead determination that have not been collected in our equipment.