INDEX. 



149 



mercial, 134; value, 136; how 

 coloured, 136 



Saccharine solutions, table of 

 densities of, 13, 139, 140 



Saccharometer, its construction, 

 principles, and use, 117-121 



Sachs, Prof., experiment by, 22 



Salt, presence in kainit, 67 



Saltpetre, 26 



Sand, origin, composition, and 

 properties, 17 ; power of retain- 

 ing food constituents, 30 ; 

 amount in filter-press cake, 93 



Sap, concentration of, 14 



Schlosing's chemical researches, 

 26 



Science, connection with agricul- 

 ture, V, vi, 1 



Scum, formation of, 90, 91 



Scum-cake, its manufacture and 

 use, 92-97 



Seaweed, use as manure, 66 



Sedimentary soil, analysis of, 23 



Selection of plant-tops, 43-45, 47 



Setting up the wash, 91 



Sheep, nitrogen and ash constitu- 

 ents obtained from and voided 

 by, 57, 58 



Shier, Dr. John, test for clarifying, 

 86, 87 



Silica, 17, 21-23, 30; fused with 

 potash in burning trash, 53 ; 

 amount in mould from water- 

 course, 54 ; amount in filter- 

 press cake, 93 



Silicate of alumina, 16, 30 



Silicon, 3 



Silting of drains, 38 



Skegel's mill, 77 



Soda, 21, 22 ; amount in filter- 

 press cake, 93 



Sodium, 2 



Sodium nitrate, 26 



Soil, origin, composition, and prop- 

 erties, 15 ei seq. ; necessary con- 

 ditions for fertility, 17, 18, 27 ; 

 porosity of, 19-21 ; plant-food in, 

 21 et seq. ; analysis of, 22 et seq. ; 

 weight of, 23 ; presence of mi- 

 crobes in, 26 ; defects in, 27 ; 

 importance of air to, 27 ; sterili- 

 zation of, 29 ; power of retaining 

 food constituents, 30 ; nitrifying 

 organism of, 31 ; condition of, 

 32 ; proper conditions of, 32 ; 

 drainage of, 33-39 ; cold or wet, 

 34 ; waterlogging, 35, 42 ; experi- 

 ments on, 48; matter extracted 

 from, by cane crop, 49, 50 ; re- 

 turn of matter to the, 50 ; a use- 

 ful agent in fixing ammonia, 63 ; 

 improvement of stiff clay, 66 ; 

 non-retentive of nitrates, 72 



Sombrero, phosphate beds of, 69 



Soup, how preserved, 127, 128 



Specific gravity, 117 



Sports, 45 



Stand-overs, 42 



Starch, 6, 12-14 ; production of, 

 by plants, 13 



Starch-cells of leguminosae, 28, 29 



Steam, temperature of, under vari- 

 ous pressures, 137 



Steam pans, 100 ; character of mo- 

 lasses from, 122 



Stem, functions of, 14 



Stills, 133-136 



Stomata, 11 



Striking the pan, 100, 102 



Strontia, combination of cane- 

 sugar with, 125 



Subsiding, 114, 115 



Subsoil draining, 34-39 



Sugar, proportion of carbon in, 12 ; 

 amount in filter-press cake, 94 ; 

 chemistry of, 98 ; conversion into 

 alcohol, 129 



