283 



and also study the influence of their component 

 parts. Dr. Eoyle gives the results of an analysis of 

 cotton-wool and cotton-seed made in New Orleans 

 in December 1843 : 



"1st Analysis Cotton-Wool. 



One hundred parts of cotton-wool, on being heated in a 

 platinum crucible, lost 85*89 * parts. The residuum, on 

 being ignited under a muffle till the whole of the carbon was 

 consumed, lost 12*735, and left a white ash which weighed 

 nearly 1 per cent., or 0*937 ; of this ash, nearly 44 per 

 cent, was soluble in water. Its constituents were as 

 follow : 



Carbonate of Potash (with a trace of Soda) 44'29 



Phosphate of Lime (trace of Magnesia) 25-34 



Carbonate of Lime 8'97 



Magnesia 6-75 



Silica 4-12 



Sulphate of Potash 290 



Alumina 1*40 



Chloride of Potassium \ 



Magnesium I 



Sulphate of Lime >and loss 6*23 



Phosphate of Potash ( 



Oxide of Iron (a trace) } 



100-00 



(Supposing the carbonic acid in the abovementioned salts 

 to have been derived during the incineration of the cotton, 

 the following will more accurately express the important 

 mineral ingredients abstracted by the cotton from the 

 soil, for every 100 parts of its ash : 



Potash 31-05 



Lime '. 1709 



Magnesia 3-24 



Phosphoric Acid ,. 12-32 



Sulphuric Acid , 1*20 



A 



