358 Supposed New Mineral Species. 
rected anew to the subject, by receiving from him a specimen of 
the Phillipstown mineral, along with the following remarks. . ‘I 
send a specimen of a mineral found in Canada, and near West 
Point. It was ticketed Sphene, but its measure on the only faces 
{ have found, differs from Sphene, and every other mineral I am 
acquainted with. It splits parallel to the planes . of a rhombic 
prism of about 125° 15’. I conclude that it is an undescribed 
substance. Can you find it in crystals ?” 
In reply to which, I referred Mr. Brooxe to the note in my 
Treatise above alluded to, and transmitted him specimens from 
Canada, upon which in a letter of 1838, he remarks again as fol- 
lows: “Dr. Forcuammer, of Copenhagen, took specimens of the 
Canada Sphene with him last year to analyze, and I expect his 
results shortly. I have the angle of the Canada variety 125° 
30’, instead of 123° 30’.” 
Nothing farther, to elucidate the subject, had transpired last 
October, when I had an opportunity of examining, with Mr. 
Brooke, in his own cabinet, the specifaens he possessed from 
the localities above. then tioned: 
On a visit to the mineral district of St. Lawrence county, 
(N. Y.,) in company with Baron Leprrer, of New York, and 
Capt. Witt1ams, of Bristol, Conn., I had the pleasure of obtain- 
ing from two recently Sasorihed localities, highly perfect crystals 
of the mineral under consideration. One of these was on Mr. 
CLevELann’s farm, near a place called Natural Bridge, in Lewis 
county, where it occurs in small quantity, in coarse lar 
limestone, associated with a dark colored pyroxene, a pearl-blue 
scapolite, (nuttallite,) and crystallized white feldspar. 'The other 
locality is in a similar formation, at a spot called Robinson’s mine, 
two miles from the Rossie lead ‘mine in St. Lawrence county. 
_ At this place the associated minerals are, (besides pyroxene, seap- 
olite, and feldspar,) apatite in large green crystals, zircon, and 
plumb 
The crystals vary much in size, from above an inch to one 
eighth of an inch in diameter, and are variously blended up with, 
= and a eats upon, some one or all of the above mentioned 
The primary form of the crystals is an oblique atic prism, 
are oblique, from ‘an obtuse edge ; the inclinations 
M on M=112° 10’ and M on P=115° 30’. Several crys- 
cars 
“tals of this form were observed at Natural Bridge. 
