Hematologic changes are never seen in tetraethyl lead poisoning, and the compound which stabilizes lead in high concentration in the erythrocyte, when inorganic lead is absorbed, .is not formed or docs not enter the erythrocyte when the source of lead absorp tion is tetraethyl lead.

Moreover this matter 13 not an important problem at present* Obviously however* any regulations developed now in this field should avoid the use of the word "Ethyl Gasoline" since this is a patented name and therefore* will not apply to other gasolines containing lead tetraethyl.

Suggested Draft of Newa Letter For the past fifteen years the manufacture of lead tetraethyl has not been a source of great concern in relation to public or Industrial health* During that time manufacturing operations have been oarried out in only two states and under effective hygienic control* However* in the past month* as a consequence of attempts to manufacture lead tetraethyl without proper safe guards* the attention of the Public Health Service has been called to this problem* when several oases of poisoning were reported in connection with a plant that had been in continuous operation only two weeks.

XE 0022978 17 a ter from 3ludge pit of "B" building of Tetraethyl Lead plant of E.

CONCHJSION The toxicity of Lead tetraethyl has been shown to be greater than any of the substance* occuring in the process of its manufacture.

Chemically, tetraethyl lead is simple, being produced from three raw mater- ?

Phllp presented the economic justification for Increasing the permissible limit of tetraethyl lead to 4 mis. per U.S. gallon.

In fact, white gasoline may contain some tetraethyl lead, or some quantity of the organic degradation products of tetraethyl lead because of the manner of its transportation.

We are quite certain* however* that they bear no relation to the tetraethyl leal content except to the extent that gasoline containing tetraethyl lead Is likely to have a larger oontent of cracked gasoline than are the cheaper grades of straight-run petroleum distillate.

(2) FOR USE AS A MOTOR FUEL ONLY CONTAINS LEAD (TETRAETHYL) (2) FOR USE AS A MOTOR FUEL ONLY CONTAINS LEAD (TETRAETHYL) N24387.01 These signs shall he of metal or porce lainenamel andplacedbetweenthe limits of four and fivefeet above the ground level on the face of each side of the pump at which delivery is made.

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.

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