TABLE OF CONTENTS. XI 



188. Index of refraction of rock salt, various authorities 182 



jgg. " " " " sylvine 182 



igo. " " " " fluor-spar . . . . . . <. 183 



igi. " " " " various monorefringents ....,..,. 184 



ig 2 . " " " " Iceland spar 185 



!g3. " " " " quartz 186 



ig4. " " " " various uniaxial crystals 187 



jgg. " " " " " biaxial crystals 187 



ig6. " " " " solutions of salts and acids : 



(a) Solutions in water 188 



(b) Solutions in alcohol J 88 



(f) " " potassium permanganate 188 



igj. Index of refraction of various liquids 189 



ig8. " " " " gases and vapors 190 



199. Rotation of plane of polarized light by solutions 191 



200. " " " " " " " sodium chlorate and by quartz . 191 



201. Lowering of freezing-points by salts in solution 192 



202. Vapor-pressures of solutions of salts in water 194 



203. Raising of boiling-points by salts in solution 196 



204. Thermal conductivity of metals and alloys 197 



205. " various substances 198 



206. " " " water and solutions of salts 198 



207. " organic liquids 198 



208. " " " gases 198 



209. Freezing mixtures 199 



210. Critical temperatures, pressures, volumes, and densities of gases. . . 200 



211. Heat of combustion 201 



212. " " combination 202 



213. Latent heat of vaporization 204 



214. '' " " fusion 206 



215. Melting-points of chemical elements 207 



216. Boiling-points of 207 



217. Melting-points of various inorganic compounds 208 



218. Boiling-points of 210 



219. Melting-points of mixtures 211 



220. Densities, melting-points, and boiling-points of some organic com- 



pounds : 



(a) Paraffin series 212 



(I)} Olefine series 212 



(f) Acetylene series 212 



(a) Monatomic alcohols ' . . 213 



(<?) Alcoholic ethers 213 



(/) Ethyl ethers -> . - 213 



221. Coefficients of linear expansion of chemical elements 214 



222. " miscellaneous substances . . . .215 



223. " cubical expansion of crystalline and other solids . . .216 



224. " " " " liquids 217 



