Dedication
To the Memory of
THE LATE
PROFESSOR THOMAS EGLESTON, Ph.D., LL. D.
OFFICIER DE LA LÉGION D’HONNEUR AND FOUNDER OF THE SCHOOL OF MINES, COLUMBIA UNIVERSITY, AN ARDENT LOVER OF MINERALS, KEENLY APPRECIATIVE OF PRECIOUS STONES, AND A KINDLY FRIEND OF THE AUTHOR, THIS VOLUME IS RESPECTFULLY DEDICATED