285 



the analysis in a form corresponding with the second tabla 

 under cotton-wool : 



Phosphoric Acid 45'35 



Lime 29*79 



Potash 19-40 



Sulphuric Acid M6 



96-70 " 



M, Crace-Calvert determined the percentage of 

 phosphoric acid in different samples of cotton- 

 wool, and he found that 



New Orleans contained 0'079 per cent., while 

 Surat contained only 0'027 per cent. 



Can it be that the inferiority of Indian cotton is due 

 to deficiency of Phosphoric Acid in the soil f 



From these analyses we find that wood-ashes and 

 bone-dust, the latter preferably as superphosphate 

 of lime, are the principal inanurial substances likely 

 to have a direct influence on the development of 

 cotton -wool and cotton -seeds. 



All nitrogenous manures guano, nightsoil, &c. 

 should be avoided, as they assist any tendency of 

 the plant to produce wood and leaves at the 

 expense of flowers and fruits. 



The plant remaining after the cotton has been 

 gathered should be burnt and ploughed into the 

 field, and on no account disposed of otherwise unless 

 an adequate return of its ashes is made. The seed 

 may be deprived of its oil, and the remaining oil- 

 cake returned to the soil, either direct, or through 



