Evanc Lead Co.

Evanc Lead Co.

Tetraethyl lead intoxication and elated compounds of lead, J.

Perhaps you should chide your infor mant for iris naivete in physiological matters, but we can let that pass* He should know the facts in his own field better than to doubt that lead is volatilized at the temperatures occurring in the oxy-acetylene flame* The temperatures here are compounds begin to be avpoplraotxiliemaattelyte2m7p0e0ratuC,reswhailreoumnadny50l0e,ad lead oxide bolls at "white heat" (about lfj00oC, and metallic lead bolls at about 1525C* Thus the lead oxide literally bolls off from the melting surface, and is thrown into the air in the form of the oxide in a finely divided state* These particles may be inhaled and are fairly readily absorbed from the pulmonary surface* (That lead must exist as a gas to be absorbed by the lung is indeed a new and delightful hypothesis* I could wish it were true, for if it were, industrial lead poisoning would be largely non existent* It is well known that finely divided metallic lead, lead oxide, lead carbonate, and indeed, praotially any other lead compound suspended in the air will cause lead intoxication in men and animals permitted to breathe such atmospheres* It is also generally accepted that lead 00G75oY - 2- poisoning 111 occur among human beings exposed to atmos pheres containing lead compounds in particulate fora In excess of 1*5 to 5.0 mg* Pb per 10 cu* m. of air.)

This concentration ia approximately equivalent to a lead inhalation of to mgs* per working day, Under these conditions there would be a heightened lead excretion.

Joseph Lead Co

Joseph Lead Co

Joseph Lead Co

Joseph Lead Concany St.

Joseph Lead Concany St.

"Lead Industry and Industrial Lead Poisoning."

National Lead Co.

The . jaipi pigments used were white lead >, lead titanate, zinc sulfide and tiia'iiun pigments.

,case 16 of lead-poisoning* , In other words, haying first^eliminatejd 17 the possibilities of, exposure, to lead poisoning, -or even wifthl / 18 that possibilityxexistent,,what are the. typical symptoms 19 which, are,present in an active true lead poisoning case; 20 and, in this. connection,- may 1 ask,you.if, you -have person 21 ally examined and.had under your care or supervision or 22 examination true , lead poisoning cases-, and, if so, how many?

-Boston Lead Company.