CON 



422 



DAU 



Carbonic J3cid, influence of light 

 on its decomposition, 53. 

 Increase of, prevented, 42. 

 Carbon of Plants j source of, 260 - 



285. 

 Carburetted hydrogen with coal, 



372. 

 Caverns, stalactites in, 127. 

 Charcoal^ what, 24. 

 Condenses ammonia, 104. 

 Experiments of Lucas on, 249. 

 May replace humus, 78. 

 Theory of its action, 78. 

 Promotes growth of plants, 249. 

 Chelmsford, a.na.\ysis of soil of, 246. 

 Chemical effects of light, 141. 

 Forces can replace the vital prin- 

 ciple, 75. 

 Processes in nutrition of vege- 

 tables, 22. 

 Transformations, 69, 289. 

 Chemistry, definition of, 21. 

 Organic, what is, 22. 

 Neglected by botanists, 55 ; and 

 physiologists, 56. 

 China, its agriculture, 193. 

 Collection and use of manure 

 in, 193. 

 Chlorine gas, 141 : effect of, 101. 

 Chloride of calcium, 192. 

 Of nitrogen, 293. 

 Of potassium, its effect, 116. 

 Of sodium, its volatility, 123. 

 Clay, burned, advantages of, as a 



manure, 102. 



Clays, potash in, 148. 



Clay slate, 157. 



Coal, formation of, 369, 



Ammoniacal liquor from, 205. 



Inflammable gases from, 372. 



Origin of substances in, 363. 



Of humus, 30, 129. 



Wood or brown, 185. 

 Colors of flowers, 96. 

 Combustion at low temperatures, 

 327. 



Of decayed wood, 362. 



Induction of, 332. 



Removes oxygen, 42. 



Spontaneous, 324. 

 Compost manure, 118, 212, 279. 

 Concretions from horses, 156. 

 Constituents of plants, 24. 

 Consumption, 73. 



Contagion, reproduction of, on 

 what dependent, 389. 



Contagion, susceptibility to, how 



occasioned, 401. 

 Contagions, how produced, 389. 



Propagation of, 398. 

 Contagious matters, action of, 394, 

 399, 413. 



Their effects explained, 390. 



Life in, disproved, 392. 



Reproduction of, 392. 

 Copper alloy, its action, on sulphu- 

 ric acid, 292. 

 Corn, how cultivated in Italy, 152 



Phosphate of magnesia in, 156. 



Effect of carbonic acid on, 79. 

 Corn brandy, 342. 

 Corrosive sublimate, action of, 381. 

 Cow, excrements of the, 120, 176, 

 178. 



Variable in value, 179. 



Urine of the, 177 j rich in potash, 

 119. 

 Cow-pox, action of virus of, 405. 

 Crops, rotation of, 161. 



Favorable effects of, 162. 



Principles regulating, 174, 275. 

 Cubic nitre, 270. 

 Cultivation, its benefits, 47. 



Different methods of, 144. 



Object of, 145. 

 Culture, art of, 126. 



Of plants, principles of the, 144. 

 Cyanic acid, transformation of, 311. 

 Cyanogen, combustion of, 335. 



A compound base, 70. 



Transformation of, 311. 

 Cyanuric acid, 70. 



Dana, Dr. S. L., on geine, 31 . 



On phosphate of lime, 182. 



On ammonia, 259. 



On phosphate of soda in calico 

 printing, 286. 

 Daniel's manure, 287. 

 Darwin, on nitrate of soda, 270. 

 Daubeny, experiments of, 105. 



On forest trees, 164. 



On nutritive qualities of plants, 

 265. 



On source of carbon, 285. 



On source of carbon of plants, 

 260. 



On source of hydrogen of plantSj 

 263. 



Carbon of, 260. 



Experiments at Oxford, 257. 



Experiments on his farm, 273. 



Source of hydrogen, 263. 



