AMERICAN MUSEUM OF NATURAL HISTORY 
j The Collection of 
Minerals 
BY 
Louis P. Gratacap, A.M. 
Curator, Department of Mineralogy 
SUPPLEMENT TO AMERICAN MUSEUM JOURNAL 
VOL. II, No. 2, FEBRUARY, 1902 
Guide Leaflet No. 4 
Second Edition, Revised, May, 1904 
