X CONTENTS. 



147. Lubricants 154 



148. Lubricants for cutting tools 154 



VISCOSITY 



149. Viscosity of fluids and solids, general considerations 155 



150. " water in centipoises, temperature variation 155 



151. " ethyl-alcohol-water mixtures, temperature variation . . 155 



152. and density of sucrose aqueous solutions, temp, variation . 156 



153. " " " " glycerol " " at 20 C 156 



154. " " castor oil, temperature variation 156 



155. " of miscellaneous liquids ^ . 157 



156. " organic liquids 158 



157. Specific viscosity of solutions, density and temperature variation . . 159 



158. " " " " atomic concentrations, 25 C 163 



159. Viscosity of gases and vapors f 164 



1 60. " : temperature and pressure variation . 165 



161. Diffusion of an aqueous solution into pure water ......... 166 



162. " vapors 167 



163. " gases and vapors 168 



164. " metals into metals 168 



165. Solubility of inorganic salts in water, temperature variation .... 169 



166. " " a few organic salts in water, temperature variation . . 170 



167. " gases in water 170 



168. " change of , produced by uniform pressure 171 



169. Absorption of gases by liquids 172 



170. Capillarity and surface tension, water and alcohol in air '. 173 



171. " miscellaneous liquids in air .... 173 



172. aqueous solutions of salts 173 



173. " liquids-air, -water, -mercury .... 174 



174. liquids at solidifying point 174 



175. " thickness of soap films 174 



VAPOR PRESSURES 



176. Vapor pressures of elements 175 



177. and rates of evaporation, Mo, W, Pt 175 



178. organic liquids 176 



179- " of ethyl alcohol 178 



180. " " methyl alcohol 178 



181. ( a ) carbon disulphide 179 



(b) chlorobenzene J 79 



(c) bromobenzene *79 



(d) aniline 179 



(e) methyl salicylate 180 



(/) bromonaphthalene 180 



(g) mercury 180 



