DIFFUSION OF HYDROCYANIC ACID VAPOR 1 97 



the cyanide. Thus, of the total amount of hydro- 

 cyanic acid about 5 percent, remains in the generator, 

 88 per cent, is diffused, and 7 per cent, must be 

 charged to leakage or surface condensation on the 

 walls of the room. In the experiments with the box 

 it was estimated that only 68 per cent, of the total 

 hydrocyanic vapor is actually efficient, the remainder 

 being lost in the ways suggested. This greater loss 

 with the smaller box is just what we should expect, 

 for the relative amount of wall surface as compared 

 with the cubic contents is much greater. ' ' 



