CYANAMID — MANUFACTURE, CHEMISTRY AND USES 3I 



each day during the entire 21 weeks of exposure, a current 

 of air was drawn through the desiccator. 



There is therefore no loss of nitrogen, but on the other 

 hand an apparent slight gain, probably due, in the belief of the 

 experimenter, to loss of moisture before the weighing of the 

 sample for analysis. The total increase in weight is 6.92 per 

 cent., which is about the same as the increase in the factory 

 test at Jacksonville, Florida, described on p. 24. The 

 amount of derivatives formed in the latter case was probably, 

 therefore, about the same as in the laboratory test by 

 Henschel. The amount of dicyandiamide formed is about 

 10 per cent, of the total nitrogen, and the urea is about the 

 same. 



The agricultural significance of these changes will be dis- 

 cussed in a later chapter of this volume. 



The above are a few of the many records at the command 

 of the author, all of which agree in showing that when the 

 increase in weight is allowed for there is no loss of nitrogen 

 in Cyanamid under the ordinary conditions of storage of fer- 

 tilizer materials. 



