I must not omit to remark that the iédine solution should not 
be allowed to stand upon the powder for an unnecessary length 
of time, especially if air has excess, for in that case a portion of 
- iron dissolved will sooner or later be deposited again as & 
asic $ 
Bote further suggestions as to details may be aanepare 
The mode which I adopt is to reduce the whole mass of substance 
to be analyzed first to a coarse powder in the white iron mortar, 
with the aid of a fine sieve in the ordinary way, and then to 
elutriate it (also in the iron mortar) in small quantities at a time, 
using, ss in this operation, deo instead of water. 
may remark here that water should never be allowed to touch iM 
the iron aorta. It should always be washed with alcohol, au and 
dried perfectly on the sand-bath ater use, thus preserving it from 
rust. Ifit should have become rusted internally by ex eee to 
Art. XXI.—Chemical Fxamin connected with a Bullet 
which had been Trabedded for was Sthan Forty Years in the =e 
of a Man; by Henry Worvz, of New York city. 
_ Read before the Ameriean Association ~ my Advancement of Science, at 
Baltimore. 
