yiii CONTENTS. 



PAGE 



Vanadinite. (Yanadate of lead) 187 



Chroraite. (Chrome-iron-ore) 187 



Chromate of lead 



Uraninite 192 



Seleniferous deposit from sulphuric acid chambers . . 195 



Selenium soot 197 



Clausthalite. (Selenide of lead) . . . . .198 



Cast-iron 20 



Ash of the refining-hearth 205 



Glass 209 



Clay 210 



Common limestone, hydraulic limestone, marl . . 21JL 



Iodide, bromide, and chloride of sodium . . . . 212 



Crude common salt 214 



Incrustations from salt-pans 215 



Mineral waters, well-waters, saline springs . . . .216 



Soils 224 



Ashes of plants 228 



Guano 232 



Oxalate and phosphate of lime 238 



Alkalimetry 240 



Valuation of manganese ores 248 



Chlorimetry 250 



Analysis of nitre . . . . . . .252 



Gunpowder . . . ... . . . 254 



Hydrocyanic acid . 255 



Ferrocyanide of potassium . . . . . . 257 



Examination for arsenic in cases of poisoning . . . 258 



Examination for phosphorus in cases of poisoning . . 278 



Silicates 285 



Separation of the iron and manganese .... 295 



Analysis of the materials soluble in nitrate of ammonia . 296 



Examination of the volatile materials in silicates . . 300 



Equivalent weights of the elements ..... 304 



Equivalent weights of compound bodies .... 306 



INDEX 309 



