m 



INDEX. 



Manure — continued. 



In the ashes of food burned in 



the body, 148, 16S 

 Of bones, 176, 185 

 The form of, important, 131 

 Waste of, in England, 159 

 Animal, yields ammonia, 169 



Maple juice, ammonia from, 46 

 Trees, sugar of, 46 



Mjesotype, properties of, 87 



Miasm, defined, 384 



Morbid poisons, 361-375 



Mosses grow luxuriantly with green 

 light, 107 



Motion, its influence on chemical 

 forces, 272 



Mould, vegetable, 344 



Mouldering of bodies, 346 



N. 

 Nitrate of soda as a manure, 223 

 Nitric acid from ammonia, 218 



How formed 215-217 

 Nitrification, 307-310 

 Nitrogen, assimilation of, 40-57 

 In excrements, 169 

 In plants, 4 



Production of, the object of ag- 

 riculture, 52 

 Transformation of bodies con- 

 taining, 307 

 Nutrition, inorganic substances re- 

 quisite in, 64 

 Superfluous, how employed, 97 

 Of young plants, 96 



O. 

 Oaks, ashes of, 247 



Dwarf, 30 

 Oak-wood, composition of, 247 

 Odor of gaseous contagious matter, 



385 

 GSnanthic ether, 316 

 Organic acids, 1 40 



Decomposition of, 140 



Chemistry, 1 

 Oxygen, absorption of, at night, 21 



Absorption of, by leaves, 38 



by respiration, 167 



Absorption of, by wood, 338-339 



Action upon woody fibre, ib. 



Emitted by leaves, 16 



In air, 13 



Consumption of, 14 



In water. 36 



Oxygen — continued. 



Separated during the formation 

 of acids, 140 



Is furnished by the decomposi- 

 tion of water, 36 



P. 

 Peas 232 



Ashes of, 143, 235, 250 

 Ashes of straw, 238 

 Peroxide of hydrogen, 270 

 Phonolite, analysis of, 88 

 Phosphates are constituents of 



plants, 64, 67, 176, 178 

 Phosphoric acid in ashes of plants, 



64, 67, 176, 178 

 Pine-tree ashes, 68, 238, 240, 242, 



248,251,252 

 Plants absorb oxygen, 21 



Analysis of ashes, 143, 235-254 

 Characterized by their principal 



mineral ingredients, 149 

 Decompose carbonic acid, 26,27 

 Effect of, on rocks, 89 

 Elements of, 4 

 Exhalation of carbonic acid 



from, 21 

 Functions of, 17 

 Improve the air, 17 

 Influence of gases on, 22 

 Mineral ingredients of, 64, 81 



149 

 Life of, connected with that of 



animals, 57 

 Marine, food of, 157 

 Milky -juiced, in barren soils, 34 

 Size of, proportioned to organs 



of nourishment, 30 

 Rotation of, its advantage > 1 33 

 Ploughing, its use, 128 

 Poisoning, superficial, 359 



By sausages, 363 

 Poisons, generated by disease, 351 

 seq. 

 Inorganic, 356 

 Peculiar class of, 361 

 Rendered inert by heat, 366 

 Pompeii, bones from, 119 

 Porphyry, by disintegrating, forma 



clay, 89 

 Potash, in grapes, 70 

 Plants, 150 

 Replaced by soda, 70 

 Quantity in soil9» 111 



