154 THE AMERICAN MONTHLY [Jun 
torney and the arsenic from the malted milk could not 
have had the same source. To assure myself that the 
treatment with ether had not changed the character of the 
crystals from the malted milk, I mixed some of the arse-_ 
‘nic from the suspected source with pure malted milk, us- 
ing the same proportions as were found in the malted milk 
containing the poison, then panned out the arsenic in the 
same manner as from the original sample of malted milk. 
Several slides were made with the arsenic treated in this 
Arsenic from Chemical Laboratory. x 75. 
way. After the process there was no difference in the ap- 
pearance of the sample. | 
In the microscopical examination, I noted the size of 
the crystals, the size of the amorphous bodies present, the 
character of the amorphous bodies, and the relative num- 
ber of crystals and amorphous bodies. We may thus sum- 
marize the observations of the crystals from the milk,the 
whiskey, and the suspected sample. The crystals from 
the suspected sample were the smallest, those from the 
whiskey were the largest, though not much larger than 
those from the malted milk. The amorphous bodies were 
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