Under separate cover I am sending you certain published infor mation with reference to the hygienic and medical aspects of tetraethyl lead and Ethyl Fluid.

Som etim es this is m istakenly thought to be tetraethyl lead intoxication, sines the excitation due to gasolin e, lik e that associated with the ea rly stages of a n a esth esia , m ay resem b le tetraethyl lead intoxication to som e slight extent.

D. .assistant Professor Physiological Hygiene lied tetraethyl lead 2f any manner in which such, and therefore the hypothetical pline containing not D-w : egw yl lead per gallon of batteries at service of lead exposure.

Anna K. laetjer, So. i). assistant Professor Physiological Hygiene of lead, in their lied tetraethyl lead 2f any manner in which such, and therefore the hypothetical Dline containing not yl lead per gallon of batteries at service of lead exposure.

"W e have taken two goats and put one cubic centimetre of the straight tetraethyl lead in the neck of those goats.

That Mine nore tetraethyl lead.

Further, studies conducted thus far and known to us have not shown tetramethyl lead (TML) to be significantly different from tetraethyl lead (TEL) insofar as air pollution hazards or industrial exposures are concerned.

I am sure I have seen cases similar to those reported in the Bayway, M.J. and Dayton instances before tetraethyl lead appeared on the scene.

That Mane nore tetraethyl lead.

That Mane nore tetraethyl lead.

ture of large sums of money were required before the duPont Corporation was enabled to manufacture tetraethyl lead with safety.

VvEHB Concerning a Tetraethyl Lead Manufacturing Plant in Germany Purely commercial considerations make it imperative that there should be no recurrence of episodes of lead poisoning in the manufacturing end of the industry* The two points of vital im portance in the prevention of difficulties from this source are, (1) that the information on equipment and methods of manufacture which has been acquired by years of experience at the duPont Dyeworks Plant shall not be permitted to be in operafciwsr, and (2) that the details of hygienp: control which have been bu'It up through experiment and experience shall not be neglected or ignored at any point* It is conceivable that the manufacturing experience of the German Corporation which Is concerned in the contemplated negotiations will have given them reason to believe that they can cope satisfactorily with the problems associated with the manufacture of tetraethyl lead.

Some nine or ten months ago, you will remember, we had a series of cases of acute tetraethyl lead poisoning as a result of the exposure of a group of workmen engaged in digging a deep trench through:an area contaminated with tetraethyl lead by reason of leakage of the latter from the main drainage line into the surrounding soil.

Some nine or ten months ago, you will remember, we had a series of cases of auute tetraethyl lead poisoning as a result of the exposure of a group of workmen engaged in digging a deep trench thraughcan area contaminated with tetraethyl lead by reason of leakage of the latter from the main drainage line into the surrounding soil.

-2- May 2, 1958 Granting that lead tetraethyl has its hygienic drawbacks and that we have our reservations as to EDTA, is the author Justified in his two quite emphatic recommendations {1} that the lead tetraethyl in motor gasolines b replaced by benzol, and () that we abandon DTA and go back to sodium citrate?