HES 



424 



INO 



Fruity ripening of, 83. 



changes attending, 



132. 

 Fulminating silver, 293. 



Gaseous substances in the lungs, 



effect of, 407. 

 Gasterosteus aculeatus, in salt-pans, 



121. 

 Gasworks, liquor of, 205, 283. 

 Gay-Lussac, his experiments, 330. 

 Geine, 31. 



Germanrj, cultivation in, 181. 

 Germination of potatoes, 133. 



Of grain, 137. 

 Glair in, 34. 

 Glass, as a manure, 187. 



Effect ofheat on, 297. 

 Glue, manure from, 184. 

 Gluten, conversion of, into yeast, 

 348-356. 



Decomposition of, 321. 



Gas from, 339. 

 Grain, germination of, 137. 



Manure for, 119. 



Rust in, 220. 

 Granitic, soil affords alkalies, 117. 

 Grapes, fermentation of, 338. 



Juice of, differences in, 346. 



Potash in, 112. 

 Grasses, seeds of, follow man, 121. 



Silica in, 170. 



Valued in Germany, 169. 



Compost for,. 118. 

 Grauwacke, soil from, 147. 

 Growth of plants, conditions for 



the, 144. 

 Gwano, 95, 199. 



Gypsum, decomposition of, 100, 

 280. 



Its influence, 101. 



Use of, 191. 



Theory of, 280. 



Substitutes for, 282, 



Action of, 247, 280. 



Replaced, 248. 



Hailstones, 91. 



Hay, carbon in, 38. 



Contains nitrogen, 176. 



silica, 155. 



Analysis of, 38. 

 Haystack, effect of lightning upon 



a, 155. 

 Hesse, custom in, 213. 

 Hessian and English weights and 

 measures, 416. 



Hessian acre, 36. 

 Hibernating animals, 134. 

 Hippuric acid, 97. 

 Horse, urine of the, 102 



Concretions in the, 157. 

 Horse- dung, actiop of water upon, 

 177. 



Analysis of, 178. 

 Human fceces, analysis of, 179. 

 Humate of lime, quantity received 



by plants, 37. 

 Humic acid, 31, 65, 90. 



Action of, 129. 



Properties of, 34. 



Is not contained in soils, 90. 



Quantity received by plants, 37. 



Insolubility of, 128. 

 Humus, 30, 90. 



Action of, 63. 



Analysis of, 32. 



Erroneous' opinions concerning, 

 49. 



Extract of, 31. 



Action upon oxygen, 127. 



Coal of, 129. 



Conversion of woody fibre into, 

 358 



How produced, 358. 



Its insolubility, 127. 



Properties of, 34. 



Replaced by charcoal, 78. 



Source of carbonic acid, 65. 



Theory of its action, 65. 



Unnecessary for plants, 33, 77. 

 Hungary, soils of, 240. 

 Hydrates, 31. 



Hydrocyanic acid, 70, 290. 

 Hydrogen, assimilation of, 80-82. 



Properties of, 25. 



Excess of in wood accounted 

 for, 81. 



Of decayed wood, 359. 



In plants, 263. 



Of plants, source of, 82, 263. 



Peroxide of, 294. 

 Hyett, Mr., on nitrate of soda, 206, 

 271. 



Ice. bubbles of gas in, 54.. 

 Indian corn, analysis of, 98. 

 Indifferent substances, 27. 

 Inflammable air, 25. 

 Ingenhouss, his experiments, 49. 

 Inorganic compounds, 301. 



Action of, 374. 



In what they differ from organic, 

 302. 



