--'e-'d other searchers, Trtm -Ethyl Lead Deadly ''T T j

At the time of our first examination, September 30, 1940, we were suspicious that her condition was related to some chemical poisoning and requested additional information from the Board.

Valentin, who you may remember recently wrote a paper ontetraethyl lead.

The practical objective is to relate the ph lead to conditions of environmental exposure to lead, an the differentiation of safe from dangerous human exposur respect to occupational exposure, and also in relation t ingestion under basic conditions of respiratory exposure The present experiments are intended to provid respect to the concentration of lead in the air which wi population of the urban centers in the United States, in factors contribute to the dispersion of lead compounds i in the eyes of public officials is, of course, the exten compounds discharged from the exhausts of automobiles ma the lead content of the atmosphere of streets, freeways on the somewhat dubious assumption that other sources, c proportions.)

ACME WHITE LEAD & COLOR WORKS, Detroit W.

The lead data are summarized in Table C-2.

Heckel says of it: "Zinc Oxide is unaffected in color by any gases present in the atmosphere, has no effect upon any pigment with which it may be mixed, and is non-poisonous."

The evidence strongly suggested that the horses died of lead poisoning that was caused by ingestion of lead deposited on pasture grass from a smelter plant at Selby, California.

Although at. present there is no proof that the amount of lead in urban air is harmful to (27) (8-13) health,' * ' lead is poisonous,' and concern is mounting that long range ill effects may be found.(14' 15} In addition, lead is a poison for most catalysts which control carbon monoxide and hydrocarbon emission in exhaust/1 ^ Therefore, control of automotive lead emissions will probably occur within the next f>ew years. (18*,19) A.

Approximately eighteen months ago you honorable Board members and the Health Depart ment officials concerned themselves with the public health problem of lead poisoning of children, particularly with respect to the eating of chipped or peeled paint and the use of proper paints on interior surfaces which might be chewed by children.

'Ladr: Poisoning*

6o8* la tb Emaofa-&ir of tMri&a*tltyX lead isrl la lb preporatioa o?

L . to form non-volatile lead salts.

Vulcan Lead Products Co.

Vulcan Lead Products Co.