CONTENTS. IX 



Page 



Nitrous acid .... 288 



Peroxide of nitrogen . . . 290 



Nitric acid . r. . . .291 



SECT. IV. Carbon . . . . . 298 



Diamond . . . . . ib. 



Graphite ..... 299 



Varieties of Charcoal . . . ib. 



Carbonic acid .... 304 



Carbonic oxide .... 308 



SECT. V. Boron ..... 309 



Boracic acid . . . . 311 



SECT. VI. Silicon . . . . . 312 



Silica or silicic acid . . . 314 



Silicates . . . . .316 



SECT. VII. Sulphur. . . . .316 



Sulphurous acid. . . . . 319 



Sulphuric acid. .... 322 



Sulphates. . . . . .328 



Hyposulphurus acid. . . . 330 



Chlorosulphuric acid. . . . 332 



Nitrosulphuric acid. . . . . 333 



Hyposulphuric acid. . . . . 335 



SECT. VIII. Selenium. ..... 336 



Oxide of selenium. . . . 337 



Selenious acid. . . . . 337 



Selenic acid. .... 338 



SECT. IX. Phosphorus. .... 339 



Oxide of phosphorus. . . . 342 



Hypophosphorous acid. . . . 343 



Phosphorous acid. . . . ,346 



Phosphoric acid . . . .346 



Phosphates. . . . .349 



SECT. X. Chlorine. ..... 354 



Chlorides. . . . . . 361 



Hydrochloric acid. . . . ,362 



Compounds of chlorine and oxygen. . . 366 



Hypochlorous acid. . . . . 367 



Hypochlorites. ... 368 



Chloric acid. . . . .369 



Hyperchloric acid. . . * .370 



Chlorous acid or peroxide of chlorine. . 373 



Chloride of nitrogen. . . . 374 



