CHAPTER 18 Chemistry＆By William F．Neuman and Garson H．Tishkoff 1087
CHAPTER 19 Biochemical Methods＆By Nathan Glover，Frank A．Smith，Walter Mann，and Luville T．Steadman 1139
CHAPTER 20 Oral Toxicity of Uranium Compounds＆By Elliott A．Maynard，William L．Downs，and Harold C．Hodge 1221
CHAPTER 21 Toxicity Following Inhalation for 1 and 2 Years＆By Herbert E．Stokinger，Robert C．Baxter，Harold P．Dygert，Charles W．LaBelle，Sidney Laskin，Urbano C．Pozzani，Eugene Roberts，J．J．Rothermel，Aser Rothstein，Charles J．Spiegl，George F．Sprague Ⅲ，Herbert B．Wilson，and Robert G．Yaeger 1370
CHAPTER 22 Insufflation Studies in Rabbits with Dusts of Uranium Compounds＆By Herbert E．Thompson and Luville T．Steadman 1779