Not infrequently the diagnosis of tetraethyl lead poisoning has been missed, and also the reverse has occurred, in a number of instances, and we have been put to a great deal of trouble.

The toxic hazards that must be dealt with are those assoclated with the vapors of mixed hydrocarbons and of tetraethyl lead.

Even with such a toxic substance as lead tetraethyl he states (Tetraethyl Lead Poisoning.

They seem to be in no way concerned with the toxic properties of tetraethyl lead, and also seam to feel that their experience in handling this typo o?

Dear Doctor Stovall: Yo u r letter of Februari* 19, requesting an opinion a s to the advisability of increasing the tetraethyl lead content of aviation gasoline fro m 3.0 cc. to 4.6 cc. for commercial aircraft, has been viven consideration. .

From the best information which is available to me I would feel that the hazard of the handling of your present "Vitol " mixture, from the aspect of evaporation of tetraethyl lead, would be approximately equivalent to that of handling gasoline containing 350 c.c. tetraethyl lead per gallon.

They seam to bo in no way concerned with the toxic properties of tetraethyl lead, and also seem to feel that their experience in handling this typo of^ ^ a ^ ualifles them competely.

I did not say, and in fact, did not discuss,In this relationship, the practical Industrial hazards of tetraethyl lead.

The only lead compounds that are absorbed to an important degree through the skin, so far as m y knowledge and experience goes, are the liquid alkyl lead compounds, of which the only one in commercial use is tetraethyl lead.

A c t u ^ 3 ^ : the only danger `which is thought of b y us in:connection^with tetraethyl lead in gasoline Is that of{;the possibility of .lead?

Variations in the concentration of lead in the blood of humans exposed to and removed from industrial exposure to tetraethyl lead. 5.

July 19, 1940 Mr* Hugh Fossett The Associated Ethyl Company Ltd* The Adelphi London, W* C, 2 England Dear Mr* Fossetfcs Quit some time ago I received your letter with respect to the request of the Distillers Company for a supply of tetraethyl lead for carrying on some work, tha nature' of which is not disclosed'* As a matter of principle, I can see no objection to supplying tetraethyl lead to competent technical people who will make proper use of it under adequate conditions of safety* It is quite clear that if they are not able to obtain it from on source, they will from another* There is, therefor, no reason why your company should not supply such material for legitimate use.

During the war, we found out what we had never observed before, namely, that acute tetraethyl lead intoxication can be incurred as the consequence of improper handling of leaded gasoline.

During the war, we found out what we had never observed before, namely, that acute tetraethyl lead intoxication can be incurred as the consequence of improper handling of leaded gasoline.

Even when well heated, 10-16$ of the tetraethyl lead Is not cracked in the generator tube, but goes on to the flame where it is decomposed.