SS Notice of new localities of Sahlite, Coccolite, &c. 
accidental defects or the concealment. of the hinge upon 
what he supposed to be the clypeaceous univalve, calyp- 
north-east coast of Lake Huron; gryphza, (lias.) from 
Lakes superior and Simcoe,—arca, (lias,) Lake Simcoe, 
and Sanguinolaria. River Humber. L. Ontario. 
Note.—-The explosion described by Dr. Bigsby in the preceding article 
p. 75 seems analagous to the natural fires mentioned by Prof. Dewey. p. 55. 
An intelligent farmer of Dover, Dutchess Co. N. Y. informed me that 
ithi ears he had several times seen a flame, many yards i 
ven. 
sulphureous smell continued several days at the place. Ma 
ve Wi is oceurrence, which a the more superstitious has 
ced no little alarm, This occurrence has, in every instance, be 
- La : Se ST: 
rently aluminous, in cavities of the roc 
Art. Jl. Notice of new localities of Sahlite—Augite—Cey- 
lanite, §&c.—( Read before the Newstrex Lyceum, Feb. 
11, 1824. 
Last November, the Rev. I. Johnston, Baron Rederer 
and myself, visited, on a new geological excursion, a place 
called Greenwood Furnace, in Munroe, and about 18 or 
chinery of the works, we found large rocks of a very beau- 
tiful green coccolite and sahlite. The former varied in 
the size of its grains from that of a small shot to that of a 
filbert—they being uniformly of a laminated and highly 
crystalline structure, and easily, submitting to mechanical 
division. On separating the grains, they generally pre- 
sented faces of crystals, more or less irregular, and indent- 
ed, except on the faces of the lamina, which were uni- 
formly plane. The appearance of the mass was much as we 
might suppose it would be, if it had been formed by shak- 
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