Thi3 invention relates to a process of stablising lead tetraethyl and anti-knock mixtures containing the same* . ... . . ..... ......

I have previously indicated to; you. my Interest in certain, physical nnX toxicological propertie of the mixture of oil and tetraethyl lead* which must he subjected to xperlscntnX examination* namely - CD the rate of vaporisation of tetraethyl lead from oil at various. tem peraturos 3 and* (2) the extent of the skin absorption, of tetraethyl;load when diluted with lubricating dig {3) the rate of decomposition of tetraethyl load when mixtures of oil and tetraethyl load are subjected to us in motors.

The permits will only be granted if the application contains the following par ticulars: an indication of the place where the mixing is to be carried out and a list of the names of the workmen selected for this purpose and reports on their medical examination as referred to in Article II11. 2) The maxirouxa tetraethyl lead content for commercial gasoline will be ljl,2SQ by volume of commercial tetraethyl lead or 1:1,300 per Pb (C2H5) 4 0 ?

3) Mixing may only be effected mechanically in well ventilated places and a suffi cient stock of tetraethyl lead must bo carried to effect the mix.

Rayleigh Company. 1 should consider this a very unwise use of tetraethyl, lead and I should regard it as quite unwise on the part of the Corporation to promote the use of tetraethyl lead for this purpose.

However, I can cite you the reference as follows:"The Behavior of Lead in the Animal Organism II Tetraethyl Lead" by Kehoe and Thaaann, In the American Journal of Hygiene - Vol* 13. p.

The" distillations are carried out in such a teanner that there is no- possible exposure to the vapors of tetraethyl' lead* " Even the gasoline as a whole Is 'so well condensed in distillation studies than only the smallest fraction of it is lost, and under these condi tions the tetraethyl lead is very easily condensed.

We desire to add 2% by weight of tetraethyl lead to a coal tar creosote oil Dip and Disinfectant (9 lbs. tetraethyl lead per 50 gallons Dip) which is then emulsified in water using 4 pints Dip per 100 gallons water.

We desire to add 2% by weight of tetraethyl lead to a coal tar creosote oil Dip and Disinfectant (9 lbs. tetraethyl lead per 50 gallons Dip) which is then emulsified in water using 4 pints Dip per 100 gallons water.

^MHHHpvorked with organic mercury compounds for a porl cjaoryears thereby presumably establishing his technical ability to handle poisonous materials*) His handling of tetraethyl lead was very meager, consisting of repeated attempts to synthesize tetraethyl lead by a variety of methods, most of which were unsuccessful* His note books are available showing the amounts of tetraethyl lend which he finally prepared.

The handling of tetraethyl lead was discussed with Mr.

However, if seme work is done out of this contribution, which is foreign to the tetraethyl lead picture, there should be some allocation of the expense such that tetra ethyl lead will not bear the full cost.

Hygienic Aareeta of the Manufacture of Tetraethyl Lead.

Purchase price of pure tetraethyl lead from this source is also said to be $18.00 a "kilo", and I assume that this is more apt to be a liter them a kilogram of tetraethyl lead.

Vie do ship them quantities of pure tetraethyl lead as well.