I think they will find it useful to employ analytical methods that will differentiate between inor ganic lead compounds and organic, since the lead hazards are likely to be quite different if and when appreciable quantities of tetraethyl lead are available in these materials.

The temperature &t which 1VF..L. will precipitate fros Viis for various c a o^ntrations is given below* 3 cc tetraethyl lead per gulloa 6 co tetraethyl lead per gallon below -50 C. (-5S F*) -M a C* (47 F.) 9 cc tetrcethyl lesd per gallon -360 c. (-32 ?.).

Of course, his hands were covered with lead oxide, and to my amazement, the first thing he did when he came down from the catwalk was to take from his lunch box an orange which he started to peel and eat, probably one of the most effective ways to get lead poisoning.

Robert A Kehoe University of Cincinnati College of Medicine Cincinnati Ohio* My dear Kehoe* I am sorry to have been delayed in acknowledging your second lead paper but I took a holiday over the 4th of July -which has delayed me somewhat* Before I attempt to make any detailed comment on your conclusions* I would like to have you clarify one or two points in my mind as some of the data and some of the conclusions seem to me inconsistent with the results in the papers on Normal Lead and the first paper on Tetraethyl Lead* As I understand it, you interpret in general lead in the faces as a measure of exposure and lead in the urine as a measure of absorption* Presumably then, when exposure is changed there should be a change in the fecal lead perhaps followed by a change in the urinary lead* I am a little handicapped in your paper by the ab* senoe of the figures but there is apparently no evidence in the case of the two garage workers, A M* and W* B, of a change in either fecal or urinary lead when removed from their occupation Furthermore, the urinary lead seems to be well within the limits of normal lead given in your previous papers with the exception of -fee four medical students who were in this investigation.

Before I attempt to make any detailed comment on your conclusions* I would like to have you clarify one or two points in my mind as some of the data and some of the conclusions seem to me inconsistent with the results in the papers on Normal Lead and the first paper on Tetraethyl Lead.

Short Tons ) Tetraethyl lead Litharge Black oxide (est.)

An arrangement lias been made with Du Pont* to supply the tetraethyl fluid and to see that it is properly mixed with the other ingredients of the Vitane at a more or less standard mixing plant of the type used for mixing tetraethyl lead with gasoline.

An arrangement lias been made with Du Pont* to supply the tetraethyl fluid and to see that it is properly mixed with the other ingredients of the Vitane at a more or less standard mixing plant of the type used for mixing tetraethyl lead with gasoline.

Our practice in the Detroit Laboratories of Ethyl Corporation is to assume that every one of these compounds behaves like tetraethyl lead until we have proved that this is ' ot the case.

Short Tons ) Tetraethyl lead Litharge Black oxide (est.)

The regulations as set forth in Bulletin No. 163, 1926, and amended June 28, 1946, has as its primary purpose the placement of tetraethyl lead warning labels on pumps distribut ing gasoline for publio consumption.

I have occastion to fly airplanes powered with Hornet motors, which are fuled with tetraethyl lead gasoline and this has aroused my curiosity.

You are quite right in assuming that both experimentation and experience have shown that the absorption of lead from petrol containing the commer cial quantities of tetraethyl lead, is negligible.

You are quite right in assuming that both experimentation and experience have shown that the absorption of lead from petrol containing the commer cial quantities of tetraethyl lead, is negligible.

I have occastion to fly airplanes powered with Hornet motors, which are fuled with tetraethyl lead gasoline and this has aroused my curiosity, I shall be greatly obliged if you can furnish me with any information regarding the inhalation of exhaust gas of this type.