A Last of Minerals and Organic Remains. 73 
closely compacted ; but now and then having angular in- 
The same fibre or prism is sometimes four and six inch- 
- es long, but commonly much less. 
In June 18191 discovered a small druse of this mineral in 
the limestone of the chasm of the Falls of Niagara. A few 
weeks afterwards, Dr. Morton of Philadelphia, met with 
another in the same place. 
I have detected two druses of this species of strontian in 
the brown fine grained limestone of the narrows of Lake 
Simcoe, towards the river Severn, which discharges into 
Lake Huron. It is insmall groupes of diverging slender 
fibres resting on white calc. spar and quartz crystals. This 
limestone is horizontal, and is crowded with organic re- 
mains, especially terebratul, orthoceratites and asaph trilo- 
ites,—it is close to the olderrocks. Exactly this form of the. 
fibrous variety occurs in the nodular masses of the Grand 
Manitouline, containing selenite. 
} oda.—Springs of this salt have been dis- 
covered along the whole north shore of Lake Ontario. 
The first intimation of their existence is usually given by 
cattle, They are tolerably copious, and although very 
weak at the surface, are more concentrated below; where 
they are no longer diluted by rains and infiltrations from 
marshes, 
They occur in swamps based on horizontal limestone, 
containing producta, orthoceratites and others of the mor 
ancient fossils. : 
The following is the situation on this lake, of the springs 
with which I am aquainted, but I confess not to have made 
sufficient inquiries on the subject hitherto. Besides many 
smaller salt licks, in the front of lot No. 10 in Concession 
Bay of the townsbip of Murray, one mile and a half or two 
miles north west from Quinte Carrying place, there isa 
saline spring which discharges as much as a common pump. 
Vou. VINE. No. 1. 10 
