By T.G. Lovering -- Inorganic chemistry of lead in water / J.D. Hem -- Organic chemistry of lead in natural water systems / R.L. Wershaw -- Distribution of principal lead deposits in the continental United States / A.V. Heyl -- Migration of lead during oxidation and weathering of lead deposits / Lyman C. Huff -- Lead in igneous and metamorphic rocks and in their rock-forming minerals / Michael Fleischer -- Abundance of lead in sedimentary rocks, sediments, and fossil fuels / T.G. Lovering -- Lead content of water / M.J. Fishman and J.D. Hem -- Lead in soils / R.R. Tidball -- Lead in vegetation / H.L. Cannon -- Lead in the atmosphere, natural and artificially occurring lead, and the effects of lead on health / H.L. Cannon -- Analytical methods for the determination of lead / F.N. Ward and M.J. Fishman.