Confusion of Ethyl Gasoline with pure tetraethyl lead still per sists in many quarters.

The method of extracting the lead tetraethyl is by injecting steam into the flask.

Dear Doctor Thompson: I am sending you herewith a `'Memorandum on Certain Aspects of the Manufacture and Use of Tetraethyl Lead in Gasoline".

Dear Doctor Thompson: I am sending you herewith a "Memorandum on Certain Aspects of the Manufacture and Use of Tetraethyl Lead in Gasoline".

-over, absorb acre lead, t?

Signs and symptoms of tetraethyl lead poisoning, and methods of treatment. 7.

1 behsine* However a very considerable experience has shown that there are no undue hazards associated with the handling of aviation benzine even though it may contain from 4 co to 6 oo of tetraethyl lead per American gallon* From animal experimentation:these results are predictable* and If you will refer to one of the articles which I sent you on Th Behavior of Tetraethyl Lead In the Animal organism* you will flat experimental data on animals which show that tetraethyl lead is not abaorbed in appreciable quantity out of benzine* if the concentration is not In excess of one part por thousand* This concentration represents approximately if ec of tetraethyl lead per American gallon and is,therefore* well beyond the limits of the lead concentration shown by the product supplied by Romano-Americana This evidence* I feel* will serve to answer your question and will also show that the. statement-in the arfcible by Major Doctor Od* Apostal is based oa Idequate observation* The symptoms listed In your latter which Dr* Apostol attributes to the effects of lead absorption, are essentially those of either benzine Intoxication or carbon monoxide intoxication, or a combination of the two* I am very certain that the doctor has not seen persons with lead line as a consequence of this type of exposure.

1 behsine* However a very considerable experience has shown that there are no undue hazards associated with the handling of aviation benzine even though it may contain from 4 co to 6 oo of tetraethyl lead per American gallon* From animal experimentation:these results are predictable* and If you will refer to one of the articles which I sent you on Th Behavior of Tetraethyl Lead In the Animal organism* you will flat experimental data on animals which show that tetraethyl lead is not abaorbed in appreciable quantity out of benzine* if the concentration is not In excess of one part por thousand* This concentration represents approximately if ec of tetraethyl lead per American gallon and is,therefore* well beyond the limits of the lead concentration shown by the product supplied by Romano-Americana This evidence* I feel* will serve to answer your question and will also show that the. statement-in the arfcible by Major Doctor Od* Apostal is based oa Idequate observation* The symptoms listed In your latter which Dr* Apostol attributes to the effects of lead absorption, are essentially those of either benzine Intoxication or carbon monoxide intoxication, or a combination of the two* I am very certain that the doctor has not seen persons with lead line as a consequence of this type of exposure.

Signs and symptoms of tetraethyl lead poisoning, and methods of treatment. 7.

W^^vn\s not poisoned by tetraethyl lead and that the physicians at the Veterans' Hospital were correct in their opinion.

-ofchylethyl for tetraethyl lead must be considered In two relationships: I.

The organic lead otherwise (presumably degradation products of tetraethyl lead tend also to show that the material (Gunite) is not impervious to gasoline containing tetraethyl lead.

vma not poisoned by tetraethyl lead and that the physicians at the Veterans' Hospital were correct in their opinion.

- Fine0.lv divided lead, 3~ Lead tetraethyl.

Jims 7, wm Captain E* L Bergquist, Station Hosptial, Air Corps Advanced Plying 'chool, Kelly Field,: Texas * Dear Captain Bergquistj I have your letter of* June 3rd and will endeavor `to answer your questions to the best of jay ability, 1* ETHYL riilTD contains tetradthyl lead and aa organic iialxd (In the avaition fluid the halid is tftyXensdihroisid, and the proportion of tetraethyl lead to othylsn^-ai-troaid is that theoretically required for complete combination to fora lead brtffldd), la the ocaabustioa* it is boliaved that the tetraethyl lead burns to load oxide and the halids to acid, these tssr then, ccaabining to farm, lead ha34d*, This material is largely volatil ized opt of the cylinder itself and is partially deposited In the exhaust system and partially blows out with the exhaust gases - 2e There is no evidence that there .is any material difference in th chemical reactions in th fuel between axttoasobila motors and air play motors# 3* Tetraethyl lead is oxtremsly easily oxidised and 1 do not believe that there Is ary possibility 'that uritnsrned tetraethyl lead con a arm out of th cylinders* 4* The experimental dote mina^iaa of the quantity of lead in exhaust gases ds^xiremely difficult since, at least* a part of .the load Is tton^very finely divided solid state which permits it to pass through most scrubbing systems.