In audition to these ingredients kerosene is used as a diluent just to the point which makes the proportion of tetraethyl lead constant in all of these fluids, so as to facilitate blending in gasoline to the correct level of concentration of tetraethyl lead per gallon of gasoline.

'This has to do with the storage of tetraethyl lead in the Kodak Company's laboratory in bottles of 2-quart capacity.

'This has to do with the storage of tetraethyl lead in the Kodak Company's laboratory in bottles of 2-quart capacity.

Hydrofluoric acid and tetraethyl lead are not teratogens.

:Public Health Aspects of Increasing Tetraethyl Lead Content In Motor Fuel".

RULES AND REGU LATIO N S For Distribution of Gasoline Containing Tetraethyl Lead Each filling station' sh all h ave promi nently displayed on each pnmp from which gasoline containing tetraethyl lead is dis pensed, either of the following two n otices: CONTAINS LEAD (1 ) (TETRAETH YL) AND IS TO BE USED AS MOTOR FU EL ONLY, NO T FO R CLEANING OR ANY O TH ER USE.

We have not found evidence of the absorption of lead out of Ethyl Gasoline in any concentration of tetraethyl lead in gaso line less than 1 part in 100.0.

We have not found evidence of the absorption of lead out of Ethyl Gasoline in any concentration of tetraethyl lead in gaso line less than 1 part in 100.0.

We should also be quite certain that the temperatures of th cracking tube ar such as to insure ooraplot# decomposition of tetraethyl lead.

The one concerns itself with demon strating that the alleged injury is not due to the effects pf the absorption of tetraethyl lead.

The one concerns itself with demon strating that the alleged injury is not due to the effects Of the absorption of tetraethyl lead.

We should also be quite certain that the temperatures of th cracking tube ar such as to insure ooraplot# decomposition of tetraethyl lead.

Report DC-83 Project Humber 11-3 \o Humber of Fages 401 RESEARCH LABORATORIES DIVISION GENERAL MOTORS CORPORATION Detroit, Michigan THE EARLY HISTORY OF`ETHYL GASOLINE Reported by: T.

Machie, Dear Bill: Thanks very much for your letter of December 26 in connection to du Font's using tetraethyl lead for the manufacture of lignosan and ceresan.

He 0013528 3 Do oftor Sievoking '; I shall mb go Into the question of the signs of lead absorption, but I do wish to make one point* Brief ex posure to high concentrations of tetraethyl lead vapor* or massive skin absorption* as well as brief exposure to crystalline trtethyl load salts suspended in the air (such as may occur if a storage tank used for leaded gasoline Is cleaned In a dry state without protection against inhalation) may result in the sudden onset of acute symptoms* such as are described in an article written by me In 1925 (Tetraethyl head Poisoning - 3* A* M* A* BTol85* p* X08* 1925) of which* unfortunately I now have no reprints* - symptoms which bear little or no resemblance to lead poisoning* and which give none of the usual clinical signs of plumbism.