216 TRANSACTIONS OF THE [MAY 7, 
the excavators are everywhere busy, and opportunities for col- 
lectors are multiplying rapidly. Those interested in mineralogy 
are eagerly awaiting what the future shall bring forth. 
Number of Species. 
The lists of Robinson and Cozzens numbered some thirty-five 
minerals. That of Mr. Bailey in 1865 embraced about forty-five 
titles. 
What is deemed a complete list to date is herein presented. 
Some of the less important varieties are omitted, and about 
one hundred important names are placed on record—an addition 
of seventy in forty-five years. Of this last seventy-five are 
species. 
The majority of the specimens described are from the author’s 
collection. 
Perhaps no city on the globe (with the possible exception of 
Philadelphia) can produce so extended a catalogue. But the 
inference is not to be drawn that the quantity of mineral speci- 
mens is indicated by the variety. Our locality is far behind 
many othersin this respect. Specimens are not so plentiful as to 
be numbered among the chief bric-a-brac of the homes of our 
citizens, as in the copper regions of Lake Superior. Nor cana 
visitor sit down before any mass of rock fragments, as at Frank- 
lin, N. J., and in the space of an hour collect a load of interest- 
ing trophies. 
Our blasting operations are for the most part superficial— 
seldom deep enough to reach interesting material. Nor have 
quarrymen any special inducement to pursue veins and open 
pockets, which may be suggested or indicated at the surface. 
Authorities Quoted. 
Issachar Cozzens (‘‘ Geology and Min. of N. Y. Island ”). LY OF 
Fred. S. Cozzens. 
J. W. Nuttall. 
S. C. Robinson, M.D., Catalogue of American Minerals. Rob. 
J. W. Webster. J.) Wa 
J. D. Dana 
L. D. Gale, M.D 
S. C. H. Bailey. S.°C.1H. 6. 
W.E. Hidden. WEES 
