148 



ROYAL SOCIETY OF CANADA 



The experiment showed that up to a temperature of 300° C, and 

 beyond it, the eocoanut charcoal was still slightly absorptive. A curve 

 of absorptive power on a temperature base would approach the tem- 

 perature axis in an as}Tnptotic manner. 



(c) Nature of the Ahsorhing Charcoal. 



Fig. 4 and Table II show the results of experiments, under the same 

 experimental conditions, for the cases of absorption by eocoanut, animal. 



4 6 8 10 



Flow in cc per sec 



12 



and ordinary wood charcoal. The samples were all of the same volume 

 «nd same size grain (Just caught in a sieve of thirty meshes to the inch), 

 and consequently, had the same absorbing surface. The coooanut 



