OXY 



426 



PLA 



JVitrogerif chloride of, 293. 



Characteristic of, 25. 



Compounds of, 25, 27. 



^ peculiarity in, 



319. 



In albumen, 27. 



From the atmosphere, 88. 



In plants, 25, 27, 265. 



Source of, 283, 285. 



Production of, the object of agri- 

 culture, 99. 



Transformation of bodies con- 

 taining, 305. 



of bodies not 



containing, 305. 



In rice, 98. 



In solid excrements, 189. 

 In urine, 189. 

 Kutrition, conditions essential to, 

 22, 59. 

 Inorganic substances required 



in, 60. 

 Superfluous, how employed, 67. 

 Of young plants, 172. 



Oaks J ashes of, 154. 



Excretions of, 49. 



Dwarf, 66. 



Followed by firs, 164. 

 Oak-wood affords humic acid, 35. 



Composition of, 358. 



Mouldered, analysis of, 359. 

 Odor of substances, 345. 



Of gaseous contagious matter, 

 408. 

 (Enanthic ether, 344. 

 Ohio, analysis of soils of, 245. 

 Orcin, 325. 



Organs of excretion, 72. 

 Organic acids, 26. 



Decomposition of, 295. 



Chemistry, 21,22. 

 Compounds, 82. 



Compared with inorganic salts 

 in plants, 301. 

 Organized bodies do not generate 



substances, 68. 

 Osmazome, 317. 

 Oxalic acid, 70. 

 Oxford, experiments at, 257. 

 Oxamide, decomposition of, 391. 

 Oxides, metallic, in fir- wood, 111 , 

 Oxygen, 26. 



Action on alcohol, 327. 



Properties of, 26. 



Absorption of, at night, 51 



Oxygen, absorption by respiration, 

 72. 



leaves, 51. 



plants, 49. 



wood, 358. 



Action upon woody fibre, 359. 



Its action in decomposition, 331. 



Emitted by leaves, 43. 



Given to air by land, 80. 



Extracted from air by mould, 364. 



In air, 28. 



Consumption of, 40, 41. 



In water, 82, 



Promotes decay, 130. 



Separated during the formation 

 of acids, 83. 



Is furnished by the decomposi- 

 tion of water, 81. 



Payen, his table of composition 



of woods, 264. 

 Peat, compost of, 118, 258. 



Analysis of, 185. 

 Perennial plants, how nourished, 



135. 

 Peroxide, what, 295. 

 Peroxide of hydrogen, 294. 

 Peterson and Schodler^* their analy- 

 sis of woods, 52. 

 Phosphates necessaxy to plants, 155. 

 Phosphate of iron, the probable 

 cause of rust, 221. 

 In pollen, 182. 

 Phosphate of lime in teak wood, 

 156. 

 In forest soils, 182. 

 Phosphoric acid in ashes of plants, 



155. 

 Phthisis, remedies in, 73. 

 Physiologists, their experiments not 

 satisfactory, 62. 

 Neglect of chemistry by, 56. 

 Pipe-clay, ammonia in, 103. 

 Plants absorb oxygen, 50. 

 Ashes of, salts in, 110. 

 Conditions necessary for their 



life, 62. 

 Constituents of, 24. 

 Decay of, a source of oxygen, 84. 

 Decompose carbonic acid, 43. 

 Development of, requisites for, 



27, 117, 136, 143. 

 Effect of, on rocks, 150. 

 Elements of, 24. 

 Emit acetic acid, 150. 

 Exhalation of carbonic acid 

 from, 53. 



