24 FORMATION OF CRYSTALLINE BODTES IN COLLODION. 
ART. IV.— NOTICE ON THE FORMATION OF SOME CRYS- 
TALLINE BODIES IN COLLODION. 
By Joseph Leidy, M. D. 
Mr. Edward Parrish, pharmaceutist, of this city, a short 
Reference to the Figures. 
a. Long acicular crystals from collodion, as they appeared to the 
naked eye. 
b. The same, highly magnified, exhibiting their hexahedral pris 
matic character. 
c. Extremities of some of the larger crystals, highly magnified, pre- 
senting the appearance of the enclosed bubbles of liquid 
collodion. 
