New York State Education Department 
New York State Museum 
Joun M. Crarkeg, Director 
Memoir 13 
CALCITES OF NEW YORK 
BY 
HERBERT P. WHITLOCK 
INTRODUCTION 
Among the great number of crystallized mineral species there is no 
single mineral which presents such remarkable variety of crystallographic 
forms and combinations of forms, as calcite. When in addition to the fore- 
going fact we consider the no less important one that no mineral is of such 
universal occurrence or is produced under such varying conditions, it would 
seem that here, if anywhere, lay the key to the great problem of the influence 
of genetic conditions upon the crystal habit of minerals. In the present 
monograph the writer has aimed to bring to the aid of the study of this 
problem, crystallographic notes on a number of calcite occurrences within 
the limits of New York State. Such a work must of necessity retain the 
incompleteness devolving upon the limitations of present knowledge as to 
undeveloped localities. It is, therefore, hoped that with progress in the 
exploration and study of new localities the present volume will be supple- 
mented by further work on this very interesting mineral. 
The writer has drawn freely upon his previously published notes both 
for descriptive matter in the text and for illustrations of the crystallographic 
combinations shown in the plates. Much of the previously described 
material has, however, been restudied and in most instances the figures 
redrawn, 
