92 J. L. Smith on the Emery mine of Chester, Mass. 
Corundophalite proved to be a chlorite——About the time I pub- 
lished my memoirs on emery in 1850 and 1851, Prof. Shepard 
made the announcement of a new mineral (this Journal, 1851, 
xii, 211), stating that it “occurs with corundum near Ashevi lle, 
in Buncombe Co., N. C., in imperfect bene groups, and also 
spreading out in laminze between layer corundum; color 
leek-green, etc.” An analysis of it showin silica 34°76, protox. 
iron 31°25, alumina 8°55, water 5°47, making a loss of nearh y 20 
per cent, a portion © which he attributes to alkalies ; neither lime 
nor magnesia were detected. He operated on 140 milligrams ; 
this mineral was considered a new one, and Prof. Shepard called 
it corundophilite. Supposing that I had observed the same 
‘mineral in certain specimens of emery and emerylite from Ches- 
ter, Mass., I enclosed a fragment of the specimen to oe S. to 
ascertain if this was the mineral he called co ; he re- 
turned the specimen, announcing that it was. I then analyzed 
the same and found it to be, both chemically and pt bemer Fs 
chlorite, identical no doubt with the chlorite I found associated 
with the emery of Asia Minor; both the Asia Minor and 1 Chester 
varieties occur in compact mass, composed of an agglomeration 
of small crystalline plates—identical with the chlorites of Mont 
des Sept Lacs and of St. Christophe, and the ripidolites of Rauris 
and St. Gothard. In the following analysis I do not pretend to 
furnish that of the pure mineral, as from the thinness of the lay- 
ers in the specimens at my disposal my cannot be separated in 
that state of purity I am in the habit of seeking for in all min- 
erals that I examine: 
Silica, - - - - 25°06 
Alumina, - - - - - 80°70 
Protoxyd of -iron, - - - 16°50 
Magnesia, - - + - 1641 
Water, - - - - 10°62 
99°29 
ph — characters were not examined, there being no means 
t 
I may remark that the alumina and magnesia were separated 
by resolution and Hike Caer three times 
Tourmaline.—This mineral is also found oe ood a of 
Chester in the same manner as with the e of 
Titaniferous iron — —This is found, seiticaliy 3 in flat- 
tened crystals in the ite. 
Oxyd of titanium (baie ite or rutile).—With the diaspore we 
found some beautiful flattened hair-brown crystals; the speci- 
men in my ager: does - furnish the face of the crystals 
so as to enable make out what form of titanium oxyd it 
is. Prof. Shepard thinks he teh sufficient evidence to pronounce 
it to be brookite 
