But first tests showed no traces of lead in her blood or other fluids.

Mule Spinner, 426 Occupation, 393, 394, 426 Sex, 426 War Gases, 419 Latency Period, 754, 735 Age, 758 Anatomical Structure, 756, 757 Cancer Age, 754, 755 Detoxication of .Carcinogens, 757 Excretion of'Carcinogens, 736 Intensity of Exposure, 756 Potency of Carcinogen, 755 Relation to Life Span, 752 Lathe Worker, 156 See also Corkstone Worker Laundress, 301, 653 Lead, 577, 667, 716, 721 Erythrocytosis, 377 Liver Cirrhosis, 346 Lead Arsenate, 22 Lead Arsenate Manufacturer, 710 Lead Miner, 326, 313 Lead Ores, Smelting of, 33 Lead Smelter, 33, 710 Lead Worker, 34, 328 Leather, Arsenic in, 483 Leather, Artificial; Maker of, 479 Leather Worker, 29, 209 Lebanon, Cirrhosis of Liver, 353 Leiomyoma, 650 Uterine, Traumatic Cancerization of, 650 Leiomyosarcoma, 650 Lens Grinder, 163 Leukemia, 14, 16, 592 Benzol Poisoning, 395 Carcinosis with, 390 Causes of, 770 Correlation Hypothesis, 590 Drug Sensitivity, 591 Increase of, 593 Joachimsthal Chemist, 455 Infectious Diseases, 589 Osteosclerosis with, 590 Placental Filter, 620 Pregnancy in, 620 Radioactive Substances, 608 Relation to War Gas Poisoning, 621 Roentgen-rays, 608 Shift in Types, 593 Leukemia, Actinic, 607 See also Radium Leukemia, Roentgen-leu kemia Experimental, 611 Occupational, 607 age, 607, 608 causal relations, 609, 610 eosinophilia in, 609 incidence, 607, 610 medico-legal aspects, 612 occupation, 608 sex, 607, 608 types, 610 Therapeutic, 610 Leukemia, Benzol, 14 See also Benzol Leukemia Causal Relations, 597 Experimental, 398, 599 Incidence, 597 Occupation, 597 Sex, 597 Leukemia, Myeloblastic, Radium Poisoning, 6 07 Leukemia, Myeloid, 589 Leukemia, Traumatic, 613 Age Distribution, 619 Causal Significance of Trauma, 615 Classification, 616 Diagnosis of, 621 Location of Trauma, 614 Medico-legal Aspects, 619 Sex, 619 Symptoms, 617 Types of Trauma, 618 Leukemiogenic Agents, 626 Leukemoid Reactions, 589, 591, 597 Actinic, 604 Benzol, 394, 595 Roentgen-ray Exposure, 607 Leukoblastosis, 588, 592 Classification, 589 Occupation, 593 Leukoblastoma, 588, 592 Classification, 389 Occupation, 593 Leukocytosis, 589, 397 Actinic, 604 Benzol, 594 Leukoderma, 44, 766, 767 Dyes and Intermediates, 211 Solar Cancer, 239 Leuko-melanoderma, Roentgen-cancer, 258 Leukopenia, Actinic, 604, 607 Benzol, 594 Radioactive Substances, 602 Roentgen-rays, 602 Leukopenic Anemia, 676 Leukoplakia, 317 in Glass Blower, 320

Use of Lead Antiknocns U.S. lead consumption--breakdown oi. various uses.

I have spent the greater part of my professional and: scientific life in - the Investigation of lead poisoning, and perhaps more, specifically, in the study of .the physio logical arid pathological behavior' cf lead in the -.animal organism including man, with some special attention to some of the organic compounds of load, principally tetx'aethyl lead.

Assuming that a tube of tooth paste contains about 75 grama of material with a concentration of 200 p.p.m. of lead, and as suming that one uses about 2 grams of the tooth paste per day, the amount of lead taken into the mouth woula be 0.iq. milli grams of lead, assuming further that a tenth of the quantity might remain on the mucous membranes or be swallowed, the amount available for absorption would be Q.Oij. mg.

Joeoph Toad Co, daimia, Metallic Lead Products PiTidoa, Lead Indnatriaa Aiaorlari-- HYGIENE SESSION 10: IS AJL A Medkal Ylew of tbe Leod Problem -William C VOenU.

Wilson reported that a comparison received from Mew fork giving the standing of the various branches of the National Lead Company as of Hay 1, 19kl on sales of regular paste white*lead and also on the new white-lead paint, showed the following!

Assuming that a tube of tooth paste contains about 75 grams of material with a concentration of 200 p.p.m. of lead, and as suming that one uses about 2 grams of the tooth paste per day, the amount of lead taken into the mouth would be O.lf milli grams of lead.

Pittsburgh, National lead it Oil Co. of Pk^3l6Fourth Avenue .

Assuming that a tube of tooth paste contains about 75 grama of material with a concentration of 200 p.p.m. of lead, and as suming that one uses about 2 grams of the tooth paste per day, the amount of lead taken into the mouth would be 0.iq. milli grams of lead, assuming further that a tenth of the quantity might remain on the mucous membranes or be swallowed, the amount available for absorption would be Q.Oij. mg.

tank of one of your company's anes are available, and it seems best that these reports bo forwarded to you for appropriate handing* A notation has come to me today through one of the representatives of Ethyl Corporation that Mr* Morris of your company has been inquiring about these results, and no doubt he will wish to be informed about them* It will be noted that the lead content of those samples is quite low* The concentration of tetraethyl lead is negligible, while the total lead content as represented by that "extractable by acid'* is so low as to have little significance from the point of view of hazard* Undoubtedly if a large quantity of scale and duet, containing such a concentration of lead were to be suspended in the atmosphere it could give rise to come hazard under conditions of prolonged exposure, but the risk of lead exposure fpom this source is certainly not very great* It appears that seme of your company*s employees have been apprehensive about their exposure to lead* #- KE n - \J V/ \) 1,!

I know nothing of the status of these, men with respect to their clinical condition or the nature or duration of their employment - However, it Is apparent from these results alone that no one of these men bar had any slgnific&Bt occupational exposure to lead* All of the results are within normal limits, being just like results that would be obtained if one. caxrled out analyses on the correspondlag materials from random individuals in the normal population of and professional people* I have a copy of Doctor .Kitmalllor* letter of November 29, and 2 wish to confirm his statement that I am heartily In favor of a comprehensive investigation of the status of your employees with respect- to occupational hazards* As Doctor- Kitsmiller lias stated, I expect to be in Miami during the Christmas period, a M if It is possible and is desirable on your part 1 should be very happy to discuss vlth you tho aocosaary details of %our work In tills . connection* If there are any specific matters that I should be prepared to discuss vith you, X should be glad to know of them at your convenience* I have just noticed that copies of the analytical reports of the material obtained from a wing tank of one of your company** jlano are available, and it seems best that these reports be forwarde& to you for appropriate handling* A notation has come to me today through one of the representatives of Ethyl Corporation that Mr* Morris of your company has been inquiring about these results and no doubt he will wish to be informed about them* It will be noted that the lead content of these samplo* is quite low* The concentration of tetraethyl lead is negligible while the total lead content as represented by that "extractable by acid** is so low as to have little significance from the point of view of hazard* Undoubtedly if a large quantity of scale and dust, containing such a concentration of lead were to be suspended in the atmosphere it could give rise to some hazard under conditions of prolonged exposure, but the risk of lead exposure from this source is certainly not very great* It appears that seme of your company*s employees have been apprehensive about their exposure to lead* K E nip'; Ut> #- KJ V/ U O Dr* Howard K.

Boy White-Lead gives long- NATIONAL LEAD COMPANY lasting protection.

TSTRA ETHYL LEAD PLANT fti December 21, I93I ` * DR.

This is in addition to the routine physical examinations for indications of lead poisoning.