INDEX. 



Acetic acid, formation of, 129 



Acetic ferment, 129, 130 



Acid phosphate of lime, 68, 09 



Acids, those in soil must be neu- 

 tralised, 27 ; cause of inversion, 

 99 ; use in tempering, 99 



Agriculture, science in, v, vi, 1, 

 18 



Air, influence on root-growth, 18, 

 19, 27, 32, 33 ; putrefactive pro- 

 cesses in the, 128 



Albumen, amount in cane-juice, 

 85 ; precipitation in clarifying, 

 86, 90 



Alcohol, formation of, 124-127, 

 129, 130 ; conversion into acetic 

 acid, 127 ; yield from cane sugar, 

 132, 133 ; condensation of, 135 



Alcoholic ferment, 129, 130 



Alum, extracted from beet mo- 

 lasses, 126 



Alumina, presence in plants, 21 ; 

 amount in pen manure, 61 ; 

 amount in filter-press cake, 93 



Ammonia, insoluble in vpater, 30 ; 

 retention by soil, 30, 63 ; loss of, 

 from pen manure, 59 ; forma- 

 tion from nitrogenous matter, 

 62 ; ratio of sulphate of ammonia 

 to, 72 



Ammoniacal manures, restrictions 

 on use of, 48 



Analysis, purchase of chemical 

 manures on, 68, 71, 72 



Anderson's analysis of pen ma- 

 nure, 64 



Animal charcoal, use in decolour- 

 isation, 115, 116 



Animal excreta, a nitrogenous 

 manure, 25, 26. See also Pen 

 Manure. 



Animal life, dependence on vegeta- 

 ble life, 13 



Animal manure. See Pen Ma- 

 nure. 



Animals, care of, 60 



'' Annales Agronomiques," quoted, 

 58, 59 



Antigua, analysis of volcanic soil 

 at, 23 



Arrowing, 44 



Arrowroot, 14 



Aruba, phosphate beds of, 69 



Ash constituents obtained from 

 and voided by cattle, 58 



Ashes, 47 



Atmosphere, composition of, 11, 

 25 ; action on plant-food, 24 ; 

 the source of carbon for plants, 

 25 ; absorption of nitrogen from, 

 by Leguminosce, 28 



Bacteria, assimilation of atmo- 

 spheric nitrogen by, 29 



