X CONTENTS 



CHAPTER PAGE 



XXX. SILICON, BORON 359 



XXXI. COMPOUNDS OF SODIUM AND POTASSIUM 365 



XXXII. THE RECOGNITION OF SUBSTANCES, I. A REVIEW OF 



THE NON-METALLIC ELEMENTS 374 



XXXIII. CALCIUM AND ITS COMPOUNDS 383 



XXXIV. PLANT LIFE. CELLULOSE, STARCH AND SUGAR 395 



XXXV. PLANT LIFE. OSMOSIS. FERTILIZERS 405 



XXXVI. PLANT PRODUCTS. FERMENTATION AND FUELS 417 



XXXVII. ANIMAL LIFE AND ANIMAL PRODUCTS. FOODS 428 



XXXVIII. MAGNESIUM AND ZINC. IONIC EQUILIBRIA 446 



XXXIX. ALUMINIUM 466 



XL. SYNTHETIC ORGANIC PRODUCTS 474 



XLI. IRON, NICKEL, COBALT 486 



XLII. LEAD AND TIN 502 



XLIII. COPPER AND MERCURY 510 



XLIV. SILVER, GOLD, PLATINUM 519 



XLV. MANGANESE AND CHROMIUM 527 



XL VI. THE RECOGNITION OF SUBSTANCES, II. A REVIEW OF 



THE METALLIC ELEMENTS 536 



XL VII. RADIUM. ATOMIC ENERGY AND ATOMIC STRUCTURE 542 



APPENDIX 557 



INDEX , . , 559 



