Applying the blood lead/air lead slope J>f 2 m /dl to the estimated national air lead drop of 0.32 pg/nr, provides a rough estimate of 0.64 pg/dl for the expected blood lead drop.

Joseph Lead Co.

Also recommended were studies of the lead content of human organs, of the particle size distribution of atmospheric lead, of the estimation of lead levels in blood and urine, and of the propor tion of lead absorbed from cigarette smoking.

Lead Product* Dir.

Lead Product* Dir.

LC 127 Lead Pigments in Paints XM 153 IM 155 IM lfcl Explosive Cladding of Lead to Steel Cryogenic Properties of Lead & Lead Alloys Industrial Application of Lead LC 139 Oriented High Lead Ferrites LC 150 Photochemical Reactions of Lead Oxide ULC 52 Phase Diagrams of Leaded Glass Systems ULC 53 Crystallization of Magnetic Lead Ferrites US 115 Seven Cities Survey IH 79A & B Toxicity Testing for Organo-Lead Compounds IE 152 Blood-Lead Analysis Study LH 157 Health Study of Lead Workers LH 9 Study of Biological Basis for Lead Intoxi cation LH 106 Kettering Lead Abstracts LH 158 Information on Lead Environmental Health Activities in Europe UIH 17 Study of the Effects of Lead on the Respiratory Activity of Erythropoietic Cells ULH 20 Effect of Particle Size on the Absorption of Lead in Humans UIH 21 Health Effects of Lead Workshop UIH 22 Human Variations in Susceptibility to Lead ENVIRONMENTAL HEALTH UNDESIGNATED RESEARCH AUTHORIZATION LP 52 Lead Abstracting Service 10,000 27,610 20,000 2,500 7,500 8,950 6,800 6,000 3M59 10,000 9,000 50,000 52,240 2,500 3,500 7,790 37,500 1,700 12,500 25,000 11,820 The possibility of discontinuing financial support of the abstracting service was discussed.

Lead in Blood - - - - - - - - - - - - 2.

Joseph Lead Co.

Pierrard data on transformation of air lead and exhaust lead not included.

ing Procedures for Lead in Biological Media?'

Estimating Lead Exposure and Blood Lead Levels....................... .

LEAD INDUSTRIES ASSOCIATION 0 IAIT 41ttl STftCCT NCW YOWK 17, H.T.

It is the trademark of National Lead Company which manufactures lead products for the many uses for which lead is especially fitted in art, industry and daily life.

National Lead Company also makes lead products for practically every purpose to which lead can be put in art, industry and daily life.

It is not enough to know that a worker was employed in a lead plant.