Document 2qdg794Yn90Vm5d1pBM3Y1RY5

March 2.0, 1962. Mr. J. G. Mac kens is Chief, Division of Air Pollution ublic Health Service Washington 25, D, C. hear Mr. Mackenzies 2 appreciated the opportunity of meeting you and partici pating in the discussion on the use of Tetraniethyllead following Dr. .'.Cohoe's presentation of the results of the field medical study. hr connection with our discussion on mixed lead alkyls you indicated you would like a copy of the composition, of these antiknocks, which you will find attached. If you will refer to the map which wa used to discuss the areas of use of TM.L and mixed lead alkyls you will see we did not show the use of the individual antiknocks, but grouped them together under MLA's. The reason for this is that at this time 1LA 500 is the only one being used, and this is based upon the economics of antiknock use which we discussed. If there are any questions please do not hesitate to get in touch with me. Tours very truly. 'G iba ft. cc: Dr. Vi. C. Cooper Dan Mi. Guy N9591 Gv *5 - **?* Sk tv t'i *i trei t<v r<t -' w <5 JS* v; v; ori fts G S3 G & ifvt hy i- rt5y' rvr* 0.1rn* hi~i S; f* H ft * O '.v -> - o wtv 0 cv -r n n o V 0*, O ^ ~ 0 c o ocL. O T -.. '-4 ft: &-*< j-r < * tt -* E $KM Oft. ft t-i 2* Cl fS 8 r^- % *> -! C- g >o O'^s tv ft. CCs *0 CO o c> C-''t-r M CO 0-> CN Vr-' C N V ** Wr* & AU --. Cv-? (*< ** >-i V CO -si 0 tv w- rf* o -4 fN 0 si > VT* NS 0 V* VT* vs c>* f'; <4- V--. C i-i > j;*'* EV ot O* 5--* /ft; V*v* Jr* tv u K' O ^ * O t-*- "J C'- U> N> w * C'v %& O -0 O C 0 t./j V' Cr- C*-- <? FC *--s -S3 si rr. Rt ^->V ;: V- i. K ;'* *^g* U-- X C!- h-; f'-' H* r. sv-: f" t w ** i--* N <N 0 si Os O 0 tv *vO C' O fvr-*^r C*.' VI Co a> vr *N v-> C- CC 0 cr- cn ids c. rw IV 0-- tv ft >--* N >N >--rf 0 e* O O' VA IV 0 imm si> 0 <! t 1 8 f 1 3 < O1 f *4 -- U1 O O *N -4 *N w> KE A A /' '7 0 ; : / v i/ 0 < j o i fo 1 f* I0 j ?j* If K*+ <** ik. V', CV: O tr.^ V>t n O <** 5<^ * ** K ( N9591.01