INDEX. 



405 



PAGE. 



Nitrogen, determination of as 



amides . .. ... 219 



,, determination of in 



soils 93 



,, determination of in 



a manure . . . 177 



,, in foods, determina- 

 tion of ... ... 115 



,, loss of, under various 

 conditions in ma- 

 nure heap .. 127 

 , , properties of ... 5 

 , , proportion of in food 

 retained by ani- 

 mals 302 



, , putrefaction of com- 

 bined ... ... 65 



,, source of in cereals 240 

 ,, utilisation of atmo- 

 spheric ... ... 80 



Nitrogenous food of plants, 

 natural sources 



of 81 



,, manures, expres- 



sion of analyses 

 of ... 174, 175 

 ,, manures, valu- 



able and objec- 

 tionable ingre- 

 dients of ... 175 

 , , substances in 



plants ... 213 



Nitro-glycerine, composition 



of 7 



Nucleon in milk ... ... 312 



Oats, bye-products of ... 282 



,, grain of ... ... ... 241 



,, straw value of ... ... 241 



Oils, extraction from seeds . . . 205 

 ,, dry ing and non-drying... 203 

 ,, essential, classes of ... 208 

 ,, ,, constitution of 208 



,, ,, containing sul- 



phur 210, 211 

 ,, ,, oxygenated ... 209 



Olefine series, constitution of 



the 9 



Oleic acid, occurrence of .. 203 

 ,, series of unsatu- 



rated acids . . . 203 



Oligoclasc, composition of ... 40 



Olive oil, calorific power of ... 5 



Olivine, composition of ... 41 



Organic acids, composition of 11 



,, ,, and their salts 206 



,, chemistry, meaning of 10 



PAGE. 



Organic manures, various ... 128 

 ,, matter in the atmo- 

 sphere ... . . 36 

 Organisms, micro-, assimila- 

 tion of nitro- 

 gen by ... 80 

 ,, micro-, distribu- 

 tion in soils ... 79 

 ,, micro-, nitric ... 79 

 ,, ,, nitrous ... 79 

 Orthoclase, composition of ... 13 

 ,, decomposition of 40 

 Osazone, precipitation of fur- 



f uraldehyde as 200 



Osazones, production of ... 193 

 Osmotic pressure, the phe- 

 nomenon of ... ... 227 



,, pressure, force exerted 

 on dissolved materi- 

 als in plants by ... 229 

 Osteolite, phosphate of lime 

 occurring as ... ... 13 



Ox, analysis of clot of blood of 135 

 ,, calorific power of fat of... 5 

 Oxidation, seat of in the body 



263, 264 



Oxygen as a disinfectant . . . 370 

 ,, absorption of during 



flowering 238 



,, absorption of in ger- 

 mination ... ... 208 



,, absorption of in h&y- 



making ... ... 245 



,, abundance of 19, 20 



,, action in denudation 46 

 ,, as a disinfectant ... 370 

 ,, atmospheric ... ... 25 



,, dissolved in blood .. 261 

 ,, evolved from leaves .. 235 

 ,, heat of combination 



with ... ... 4 



,, importance of in 



nature ... ... 3 



,, in expired air ... 263 



, , in soil gases ... ... 71 



,, necessity of in nitrifi- 

 cation ... ... 68 



Oxyhfemoglobin in the blood 



260, 261 



,, properties of 261 



Ozone in the atmosphere ... 33 



, , use as a disinfectant . . . 371 



Palmitic acid, occurrence of... 202 



Palm-nut cake 280 



, , meal, digestible con- 

 stituents of 288- 



