334 



INDEX. 



Superphosphate of lime 114-224 



" composi- 

 tion of differ- 

 ent brands of. ..226 

 " " how to 



make 227 



" " how to use..227 

 Swamp muck, the value of. 116 



Tillage, implements of 274 



" importance of. 183-275 



Tobacco, composition of. 312 



" cultivation of 312 



Trees, various, ash of ...279 



Turnips, cultivation of. 307 



U 



Urea, composition of. 90 



Urine, composition of. 198 



V 



Vegetable life, its beginning 25 



'Vegetable matter decomposition of 15 



W 



Water contained in crops 35 



" its composition 45 



" weight of 45 



" freezing of 45 



" as food for plants 47 



" absorption of gases by is 



" impurities in 48 



" solvent powers of...., 4S 



" formed by combustion of 



hydrogen 49 



" decomposition of in plants. 50 



" vapor of 50 



" latent heat of 54 



" absorbed by soils 184 



" diffusion of through soils....!34 



" excess of, injurious 156 



' ' required for irrigation 177 



Weeds, destroyed by summer 

 fallowing 191 



Wheat, variations of.... 151 



culture of. 293 



Woody fiber, composition of 237 



Wool waste 232 



