Clark Assistant Chief Chemist KE" 0020632 tol (test "a") ml. of laao tetraethyl ml. of 5 of lead tetraethyl lead tetraethyl evaporated___ __evaporated V>1 .

The maximum content of lead tetraethyl in commercial motor gasoline shall be in the proportion of 1: 1260 by volume for commercial lead tetraethyl, or 1: 1300 for PbCCsH^)^ C.P. 2.

of those exposed to lead tetraethyl.

Lead tetraethyl* and fluids containing lead tetraethyl in high concentrations, must not he mixed with gasoline in tanktrucks* tank-cars and other mobile equipment for transporting gasoline* except under conditions which must be defined in detail. 5.

Mixing Motor Fuels. 1. the maximum content of lead tetraethyl in commercial motor gasoline shall be In the proportion of 1:126b by volume for- commercial lead tetraethyl, or isljou for, Pb (C^H^j-jC .?

'he maximum content of lead tetraethyl in commercial motor gasoline shall be In the proportion of 1 :126c by volume for commercial lead tetraethyl, or 1:1^00 for ?

more standard shipping containers into a tank of gasoline, and to thoroughly mix that quantity of lead tetraethyl into such a volume of gasoline as to provide a final and uniform concentration of lead tetraethyl not in excess of that specified above* I4..

There is danger involved in handling all motor fuels, whether they contain tetraethyl lead or not.

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

Per Cent of Liquid Evaporation Curve c $ , 3 Per Cent Total Tetraethyl Lead Evaporation K 0020636 fC Tetraethyl Lead Evaporation fresa Vitol and Gasoline f Per Cent,Total Tetraethyl Lead Evaporation 0020637 . !

My opinion has been asked as to v/hather the tetraethyl lead should be supplied for this purpose.

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.

Handling Tetraethyl Lead A .

Handling Tetraethyl Lead A .

RULES AND REGULATIONS For Distribution of Gasoline Containing Tetraethyl Lead Each filling station' shall have promi nently displayed on each pnmp from which gasoline containing tetraethyl lead is dis pensed, either of the following two notices: CONTAINS LEAD (1) (TETRAETHYL) AND IS TO BE USED AS MOTOR FUEL ONLY, NOT FOR CLEANING OR ANY OTHER USE.