Kehoe University of Cincinnati Cincinnati, Ohio Re: Lead poisoning Dear Dr.

If we can prevent the decomposition of tetraethyl lead in the Fluid to a sufficient extent, these tanks will not require cleaning.

In most Instances, leakage Perrovanadlum dust 1 Fluoride 2.6 Hydroqulnone 2 Iron oxide fume IS Lead . 2 Lead arsenate . 16 Lindane (hexachloTocyclohexane, gam ma Isomer) .6 through walls, doors, and windows will produce at least one and one-half air changes per hour.

/ever, the alkyl lead compounds are absorbed (i.e., tetraethyl- and tetraoet!

'jyatt, engineer of cables, Ifcelps Dodge Copper Froducts Corp., New Tork, N.T.; "Tetraethyl Lead* by T.

'jyatt, engineer of cables, Ifcelps Dodge Copper Froducts Corp., New Tork, N.T.; "Tetraethyl Lead* by T.

Urinalyses for lead can now be run routinely and cheaply and with sufficient accuracy by polarographic or spectrographic methods Lead tetraethyl and other lead alkyls are likely to be much more rapidly progressive as poisons than the nonvolatile compounds and are much more likely to attack the nervous system than to produce gastroin testinal symptoms.

One thing has become quibo clear, in these studies, namely, that even slight changes in lead absorption are accompanied 2 Dr* B* C# Fisohbein by corresponding changea in tho transportation and excretion of lead, therefore we can use lead trans portation and excretion as an adequate measure of the magnitude of exposure* if observations are made in close tine relations hi p to tho exposure# Now in the case of tetraethyl lead in gasoline vse find that exposure to high concentrations of lead in the gasoline either by way of akin contact or by inhalation results in lead absorption# However when the dilution is sufficiently 1cm (1 part of tetra ethyl lead to 1000 parts of gasoline) there is no evidence that absorption occurs von after intensive and prolonged exposure.

Drivers of cars using ethyl gasoline as a fuel and In which the concentration of tetraethyl lead was not greater than 1 part to 1,300 parts by volume of gasoline showed no definite signs of lead ab sorption after exposures approximating two years. 2.

Drivers of cars using ethyl gasoline as a fuel and in which the concentration of tetraethyl lead was not greater than 1 part to 1,300 parts by volume of gasoline showed no definite signs of lead ab sorption after exposures approximating two years. 2.

Cm Pisohbeln by corresponding changes In the transportation and excretion of lead, therefore we can use lead trans portation and excretion as an adequate measure of the magnitude of exposure* If observations are made In close tine relationship to tho exposure* Now In the case of tetraethyl lead in gasoline we find that exposure to high concentrateons of lead in the gasoline either by way of akin contact or by inhalation results in lend absorption.

B UM M i.n i .........ll March 6, 1959 SUBJECTi R5PR1KT OK LEAD To Members of the Lead Industries Association!

B UM M i.n i .........ll March 6, 1959 SUBJECTi R5PR1KT OK LEAD To Members of the Lead Industries Association!

How In the case of tetraethyl lead in gasoline we find that exposure to high concentrations of lead In the gasoline either b y way of skin contact or by inhalation results in lead absorption.

This, as you will recognize, Is not true of tetraethyl lead, but that is quite another matter.