CONTENTS. xxi 



NOTE 



II. Solid excreta voided by sheep, oxen, and cows . .279 



III. Urine voided by sheep, oxen, and cows . . . 280 



IV. Percentage of food voided in the solid and liquid ex- 



crements ........ 281 



V. Pig excrements 281 



VI. Manurial constituents in 1000 parts of ordinary foods . 282 

 VII. Analyses of stable - manure, made respectively with 



peat-moss litter and wheat-straw .... 283 



VIII. Analyses of bracken ' . 283 



IX. Analyses of horse-manure ...... 283 



X. The nature of the chemical reactions of ammonia 



11 fixers" 284 



XI. Analyses of cow-manure ...... 286 



XII. Composition of 'fresh and rotten farmyard manure . 286 



XIII. Comparison of fresh and rotten manure . . . 288 



XIV. Lord Kinnaird's experiments . . . . .289 

 XV. Drainings of manure-heaps ...... 290 



XVI. Amounts of potash and phosphoric acid removed by 



rotation from a Prussian morgen (.631 acre) . . 290 



XVII. Composition of farmyard manure (fresh) . . . 291 



XVIII. The urine (quantity voided) 291 



CHAPTER VIII. GUANO. 



Importance in agriculture ....... 293 



Influence on British farming . . . . . . .294 



Influence of guano not wholly good ...... 295 



Value of guano as a manure ....... 296 



Origin and occurrence of guano ...... 297 



Variation in composition of different guanos .... 299 



I. Nitrogenous guano 



(a) Peruvian guano 300 



Different deposits of Peruvian guano . . . 301 



Appearance, colour, and nature of Peruvian guano . 303 



Composition of Peruvian guano .... 304 



(b) Other nitrogenous manures : Angamos, Ichaboe . 306 

 II. Phosphatic guanos 



Occurrence of phosphatic guanos ..... 308 



Inequality in composition of phosphatic guanos . . 309 



" Dissolved " phosphatic guano ..... 310 



" Equalised " or " rectified " guano ..... 311 



