ANALYSIS OF MOTION AND ITS SOIL. 207 



so, then the manure best adapted to the soil is the one most 

 abounding in the deficiencies of the soil, and such a manure 

 must be recommended by the teaching of science, aided by 

 all the lights of experience. 



First. What are the substances necessary to the growth of 

 the cotton plant which exist in the soil ? 



The cotton plant, like other plants, is composed of two 

 grand classes of organs, one directly and the other indirectly 

 tending to the perpetuation of the species ; the first is the stalk 

 and leaves, the second the seed and its appendage, the cotton 

 fibre or wool. 



The following table of the analysis of the Cotton Fibre and 

 Seed, shows the composition of each, and the proportionate 



quantity of the substances which they require : 







COTTON, 



General Per Centagc, Components of, as to 



FIBRE. SEED. 



Water, 4'72 9*51 



Organic Matter, 94'03 86'46 



Ash or Mineral Matter, .... 1'25 4 03 



100-00 100-00 



Per Ccntage Composition of tlie above Ash or Mineral Matter. 



FIBRE. SEED. 



Potash, 35-26 34'75 



Soda, 5-11 1-10 



Lime, . 16-73 6'00 



Magnesia, . % 9'47 13-73 



Peroxide of Iron, 2" 07 0'55 



Silicic Acid, 0'26 trace. 



Phosphoric Acid, '. 5*42 35*85 



Sulphuric Acid 3'53 3'96 



Chloride, 6-60 0.47 



Carbonic Acid, ..... 15'55 3"59 



100-00 100-00 



