CYANAMID — manufacture;, CHEMISTRY AND USES lOI 



agricultural practice. Both sulphate of ammonia and nitrate 

 of soda, however, show an availability of lOO per cent, by the 

 permanganate methods, while Cyanamid shows about 87 to 89 

 per cent, by the neutral permanganate method, 4 to 8 per cent, 

 by the alkaline permanganate method, 90 to 94 per cent, by the 

 modified alkaline permangante method, and 94 to 96 per cent. 

 by simple solution in water for 24 hours. The neutral and the 

 modified alkaline methods therefore approximate to a certain 

 extent the values that they should represent, the straight 

 alkaline method is wholly unsuitable, while the simple solution 

 in water gives the most significant results. 



