60 TRANSACTIONS OF THE [JAN. 21, 
the simple cube, but the faces of the octahedron, slightly devel- 
oped, are often present. Nearly all the crystals have on the 
surface, in small botryoidal elevations, an even coating of brown 
hydrodolomite, which is readily removed with dilute hydro- 
chloric acid. The crystals are all well colored, but the surfaces 
are dull; the tint is a uniform light sea-green, save at the junc- 
tion of the crystals, or where they are attached to the gangue. 
Here there are small spots, from one to two inches in diameter, 
of a rich emerald green. Attached to the fluorite are small 
masses of lithomarge, and imbedded in these, very perfect tetra- 
hedral crystals of chalcopyrite. 
With the fluorite are found small bunches of pyrite crystals, 
nearly always altered to limonite. Galenite has not been ob- 
served, although this locality is only a mile and a half from the 
well-known Macomb lead mines. Several years ago, a large 
quantity of rhombohedral crystals of calcite were obtained here; 
a number were the size of a man’s head, and in form they were 
generally very simple rhombohedrous. 
This ‘‘ find” is strikingly like that of the famous Muscallonge 
Lake localities of forty years ago, except that the crystals are of 
a finer color and in larger groups. The occurrence of a second 
deposit in this county leads to the inference that fluorite may 
exist in commercial quantity for the arts. 
January 21, 1889. 
STATED MEETING. 
The President, Dr. NEWBERRY, in the chair. 
Pror. D.S. Martin, in behalf of the Publication Commit- 
tee, presented the first and second numbers of Vol. VIII. of the 
Academy’s TRANSACTIONS, just issued, and also the programme 
and cards for the public lecture-course of the present season, an- 
nouncing the following schedule : 
I. JANUARY 28TH.—Volcanoes: their Distribution and Phe- 
nomena. 
Pror. Darwin G. Eaton, of Brooklyn. 
II. Fesruary 11TH.—Modes of Evolution in Fossil Shells. 
Pror. ALPHEUS Hyatt, of Boston. 
III. Marcu 4tH.—Diffraction of Sound. 
Pror. W. LeConrvE STEVENS, of Brooklyn. 
