The decrease in the dry-residue cipher of the test under 

 consideration must not however be accorded too great signifi- 

 cance. Although it may not be exactly parellel with the 

 diminution in activity, of which there is very little to be 

 remarked during the first months of storage, still this 

 decrease — a consequence of the storage — was to a certain 

 extent noticeable. The spirit-proof has herein a decided 

 advantage above the P 2 5 cipher, for this is wholly incapable 

 of bringing to light the gradual diminution of activity which 

 takes place. 



