284 







So that, for every 10,000 Ibs. of cotton-wool about 

 60 Ibs. of the abovementioned ingredients are abstracted 

 from the soil, in the proportion indicated by the following 

 figures, omitting the fractions : 



Potash 31 Iba. 



Lime 12 



Magnesia 3 



Phosphoric Acid 12 



Sulphuric Acid 1 



"2nd Analysis Cotton-Seed. 



One hundred parts, heated as before, lost 77*387, and 

 the residuum, after being burned under a muffle, left 

 3*936 parts of a perfectly white ash, the composition of 

 which was as follows : 



Phosphate of Lime (with traces of Magnesia) 61-34 



Potash (traces of Soda) 31'73 



Sulphate of Potash ,.... 2'65 



Silica 1-68 



Carbonate of Lime <H7 



Magnesia 0'27 



Chloride of Potassium 25 



Carbonate of Potash ] 



Sulphate of Lime i 



Magnesia > and loss 1*61 



Alumina, and Oxides of Iron and I 

 Manganese J 



100-00 



A comparison of the above table with that afforded by the 

 cotton-wool, will show a great dissimilarity between the 

 two. The ash of the cotton-seed is fourfold that of the 

 fibre, while the former has also three times as much 

 phosphoric acid as the latter, as will appear on presenting 



