We have discontinued the production of leaded zinc oxide so that litharge and lead arsenate remain the only products which we actively produce containing lead.

Xn this same booklet will be found some reference to the fate of inhaled particulate lead compounds. t I should make it clear to you that some of the lead in food is not the result of contamination, but is rather lead in the food as it is found in vegetation, its fruit and its roots, and in animals as well as men which have fed upon vegetation and other animal forms.

The following is a partial list of the areas in which research is presently being pursued: LEAD ZINC D-S Lead...

NATIONAL LEAD COMPANY New York, 11 t Broadway .

The speed of the response is greater in the case of airborne lead than in that of ingested lead, within the limits of comparable dosage, since lead absorbed from the lung enters the general cir culation directly instead of by way of the portal circulation through the liver.

Indeed, the concentration of lead in the blood, as in these instances, may be well within normal limits at a time when the concentration of lead in the urine is near to or in excess of the level of 1 milligram per liter.

As you know, we have made every attempt to see that benzine is mixed with tetraetnyl lead only at refineries and at approved mixing plants.

An unexpected attempt was made in the Senate to cut the tariff on red lead, litharge and white lead but through the efforts of the Lead Industries Association the rates on red LIA21528 '2lead and litharge, which were actually cut, ware subsequently restored so that the lead pigment rates are now all on the present, or 1922 tariff law, basis.

With this background we would predict that the use of lighter lead alkyls will substantially increase if the price of the lighter lead alkyls should approach that of TEL.

MAINTENANCE PERSONNEL LEAD EXPOSURE The Maintenance worker lead dosimetry program was begun.

Their exposure to lead should be greatly reduced at once, preferably by being transferred to work entirely free of exposure to lead.

As a matter of fact, tetraethyl lead itself is not a skin irritant, and we have not able to establish any evidence of sensitivity phehomenSSi in connection with tetraethyl lead.

Chap ter- on "Lead absorption and lead intoxication versus tuberculosis" by Elston L.

Space is not available in cars for such an in stallation* Bven If it ware, the cost of the equipment per pound of lead recovered would be extremely high* There are very large deposits of lead in the United States which are considered to to submarginal in relation to the present price of the metal and to methods of its recovery, however, the working of these deposits would fee much more practical than an attempt to recover lead exhausted into to# air.

(b) Estimate recoverable lead content.