There is every likelihood, I think, that from time to time somewhat higher concentrations of tetraethyl lead will be Introduced into aviation gasoline than are permissible or will ever be permissible in automobile gasoil fs# The problem of the exhaust gases which has been investigated only with relation to the maximal concentration of 3 cos. of lead per gallon of gasoline, is not a serious one in the case of airplanes because of their field of operation# This problem is an important one In the case of automobiles find it is my opinion that there will not be any justification from an hygienic point of view for allowing the concentration to be raised in ' automobile fuels# If this should be done in the case of aviation fuels, and I believe It will be, the problem of handling such fuels will become Increasingly important.

Gasoline containing tetraethyl lead in the commercial amounts does not give rise to t he danger of lead absorption by skin contact or by inhalation.

As more lead was found in the effluent air than could be explained by the presence of amounts of gasoline vapor which were found, it seems possible at least that there might have been an accumulation of tetraethyl lead in the hose wall as a consequence of repeated soaking in lead containing liquids and subsequent drying.

Dear Sir j- I wish to obtain a copy of MAn Appraisal of the Lead Hazards Associated with the Distribution s.nd Use of Gasoline Con taining Tetraethyl.

Dear Mr* Thenault: vanpaneeurwdrtrypiscoIlssIeneetrriiwkotohefhuaisitcththdiiswttihfalIfsaienitchrdtetnauievocclereatinnteeointssnsloyetwttohhfphraeuoiccatbmhraldyilysoclhooufreyunodoacmIruese"rrOynonapnmuotrtoIeten*bfnohtaotbariTxvloyehiinnocerggaacoettoioahondtiinyeamnfeby ' Tetraethyl Lead" by M* Duvoir and F* Coste, the latter Tashiysouarptircolbeabolyf kwnhoiwchbeIinhgaveouar raespsoricniatteapapnedarecdollienague* Semalne d* IIop. d.

Cumming* letter, we have revised our aviation contract to insert in the appropriate place the following clause ''Euyer may mix up to but not exceeding four (4) cubic centimeters of tetraethyl lead per TJ.

Part I, on tetraethyl lead has been read by a number of our editors.

Tetraethyl lead poisoning clinical.

August 7, 1937 Hr. 0* B* Lewis Ethyl Gasoline Corporation Chrysler Building Dew York City Hew York Dear Mr* Lewis* X am in receipt of your telegrams of August 6th. concerning an alleged case of lead poisoning as diagnosed by Dr* 0* tt Weaver,.

Bear Mr* Lewis* X am in receipt of your telegrams of August 6th. concerning an alleged case of lead poisoning as diagnosed by Dr* 0* M* Weaver,.

The maximum amount of tetraethyl lead permitted to be used in Ethyl Gasoline is 3 c.o. per U* S* Gallon, while in the regular gasoline the maximum lead coatKit is 1 c*o* The amount of lead varies with the inherent anti-knock value of each let of gasoline that is treated, certain specifications of anti knock value .being sot up for the two grades,' of course -Ethyl Gasoline being of substantially higher quality because of its premium price* Ethyl Gasoline pumps require the following notice on them* ;i CONTAINS (t e i p a s t r x i } m d IS TO BE USED IS MOTOR FdlL O H M , HOT FOR CLEANING OR ASX OTHER USE AVOID SPILLING* .` - Gasoline treated with "QW fluid requires the following notiee* FOR USE AS A MOTOR FOIL O H M CONTAINS ' t .XAB , (T1TRAETRH,) All Ethyl Gasoline is colored red* Regular gasoline treated with BQ* fluid must b colored, and all of the colors are used by the various oil com panies except red, which is reserved for Ethyl* ^ 0000536 Page 2 , 0/ 22/ 53* Both gasolines are dispensed to the eoosuster in general by the filling of their automobile task although a very samli amount is sensetimes bandied in .imam lots.

These will cover items 17, E5, 9, and 33 that you mention, insofar as question 37 was concerned, that was also changed to 4 U, S, gallons* under question 40 we used a factor of 470 pounds of tetraethyl lead per large drum as an approximation of the actual figure 47S.86* The factor for lo gallon drams of 85 pounds was based, I believe, on the percentage of lead in the present aviation mix* I assumed that the greater proportion of 10 gallon drums used in this country, were used for aviation mixing* Under question 45, v?

is referred to you for examination and report to determine whether or not his present condition and disability are the result of lead poisoning from the use of tetraethyl gasoline.

You will remember that I noticed the small of Tetraethyl Lead and its decomposition products as we approached tbo T.3.L. building.

This is the type of distribution Which] baa finds in cases where the exposure has been severe and bps been rapidly absorbent and which occurs a short time prior to death, and confirms our observation and impression that Kriynovioih died of acute tetraethyl lead intoxication.