Today and I gasoline containing tetraethyl pr d ay th e re 's a special featu re fo r ; r r a fans only in the W orld-Tele- i lead was reported by a Univer-1* and Sun.

Ficlduer Hovember 7,1923*CL-BH Superintendent, 175Bureau of Mines, Pittsburg, Pa C SCBJBCTi Physiological Effects of Ethyl <3as Pear Ur# fte In the Minute* of your Problem Confereno# of the cnealoal Division, October 27, X note under Bil69, the above title, and I believe that 1 recall that Midgifcy toll m his Company had decided to adopt the trade name "othyl gas*" Of course, their object in doing eo are fairly clear, and among other thlnge j they are not particularly desirous of having the name "lead" appear in this oae* That is alright from the standpoint of the general Hotors Company, but it la quite a question in my mlhd as to wither the Bureau Of Mines would be justified in adopting this name 0 early in the game before it has haa the support of popular usage The reason for wy objection are as followsi (1) it will lead to confusion, especially if the name ever beoomes^w^d^f^used, as there are many other ettyl gases b e s i d e ^ t e t m e ^ V l leadi () since tbs real ob ject of our investigation is to determine whether or ; not lead 1 deleterious in the combustion products, it * seems to me that we would be wise in our investigations \ to refer to its chemical name "tetraethyl lead, or one of tbs other ones possible This is merely ay personal feeling, and X am open to conviction.

ng^io connectlco with the handling of gasoline# As you will see from tho studies made, the danger of lead poisoning in con nection with the gasoline is negligible.

Curtis, I am sure, and probably will be no surprise to you, that I feel a fairly heavy burden of professional responsibility for the safety of the practices of the petroleum and automotive industries in relation to tetraethyl lead or its homologues.

Please explain the difference between tetraethyl load and tstramsthyl lead, and the advantages of both?

NMBB-000761?

NMBB-000761?

This is indicated by lead deposits at burner slots.

Prophylaxis in Industrial Lead Poisoning.

PLAINTIFF'S EXHIBIT o (I XtfF W I " '^r-v nn/ ,**1 r\ r~!

HWBB-000761?

We are more interested in keeping lungs free from poisonous du and gases, his bones free fro lead, his liver free from chlor nated solvents, etc.

HWBB-0007612 \ r~- >: Irdustri?.!

It was not to be inferred that tetramethyl lead would replacq tetraethyl lead but rather that either or both would be used for addition to motor gasoline as might prove economic.

They said modern gasoline "The position of the licensed if y _ -T mur, Lauds Haney Jail contains tetraethyl lead which operator today has necome a is easily vaporized and sent nightmare." the brief said. into the atmosphere through The brief said licenced 1 pu-; car exhausts.