Bulletin - United States National Museum

6 BULLETIN 33, UNITED STATES NATIONAL MUSEUM.
far as possible the uame of the authority for the species has been given
in italics. Tlie sjuonyms under each species have been divided into
classes where that is necessary, and then arranged alphabetically for
convenience in referring to them. The symbols representing t. e composition
of the minerals have been given according to the new system,
as that seems mostly to accord with the modern progress.
It would not have been possible for me, with all my other duties, to
have done this work without the very careful and zealous assistance '-f
Mr. A. J. Moses, instructor in mineralogy of the School of V jd
the active co-operation of my assistant, Mr. Struthers, and to tu^se gentlemen
I gratefully acknowledge my indebtedness.
THOS. EGLESTOK
School of Mines, Columbia College,
New Yoric, December 1, 1886.