CYANAMID — manufacture;, CHEMISTRY AND USES 



25 



Test of Two Bags. — A test on a smaller scale was made by 

 the author, at Niagara Falls, Ontario, in 1912. Two ordinary 

 burlap bags, each holding about 150 pounds of Cyanamid 

 hydrated on November 12, 191 1, were exposed November 17, 

 191 1, on a raised platform made of 4-inch strips spaced 4 inches 

 apart. The room was dry, well-ventilated by an open window, 

 and kept most of the time between 10° and 35° C. Samples 

 were drawn and the weight of the bags was taken just before 

 they were laid out on the platform. At the end of each period 

 of exposure as noted below, the bags were carefully weighed, 

 and the contents were removed. After thorough mixing of 

 the material a sample was drawn, and the bags were refilled, 

 tied, weighed, and again laid out on the platform for further 

 exposure. The following data were obtained: 



Moisture 

 Per 

 Sample drawn cent. 



Nov. 17, 1911 0.00 



Dec. 17, 1911 0.40 



Jan. 17, 1912 0.47 



Feb. 17, 1912 0.46 



May 17, 1912 0.67 



Weights. 



Per cent, 

 gain in 



weight Per cent. Per cent. 



Weight Gain in since nitrogen Per cent, nitrogen 



pounds weight previous calcu- nitrogen gained 



Date net pounds weighing lated found or lost 



Nov. 17, 1911 148.25 — — — 16.54 — 



Dec. 17, 1911 ^150.75 2.50 1.69 16.266 16.31 -fo«04 



" " " ^149.25 



Jan. 17, 1912 150.50 1.25 0.84 16.131 16.11 —0.02 



" " •• 149.50 



Feb. 17,1912 150.50 i.oo 0.67 17.024 15.96 — 0.06 



" *' " i5ofbo 



May 17, 1912 153.25 3-25 2.17 15-683 15.69 -f-o.oi 



^ Before sampling. 

 ^ After sampling. 



