STRONTIA. 
211 
Jefferson County. At Brownville, celestine is said to have been found in slender crys¬ 
tals ; and at Chaumont bay, in masses of a snow-white colour, made up of long and slender 
prisms or needles, arranged in a radiated or stellated manner. Some of the specimens from 
this locality are nearly or quite pure. According to Dr. Emmons, this mineral occurs in the 
water limestone found near Depeauville. 
Monroe County. Celestine has been credited to the vicinity of Rochester, where it has 
been said to occur in nodules in the limestone. Most of the specimens which I have examined 
are undoubtedly heavy spar, although it is quite probable that celestine may occur, as it is 
very abundant in some of the limestones farther west. 
Niagara County. In the vicinity of Lockport, this mineral was first found in making ex¬ 
cavations for the Erie canal. It has since been obtained in abundance in geodes of various 
sizes, often very large, associated with calcareous and pearl spar, selenite, anhydrite, etc. 
Two varieties occur, viz. the lamellar, and the coarsely fibrous. The lamellar variety is white 
and bluish white, varying from opaque to semi-transparent. It is often made up of long and 
slender crystals, which have the outline of the primary, or have the acute lateral edges replaced 
by planes which are greatly extended, forming a long six-sided prism. The specific gravity 
of the purest specimens varies from 3.80 to 3.95. It usually effervesces slightly in acids, 
from the admixture of carbonate of lime. The fibrous variety is snow-white, and almost 
friable. The fibres are straight, divergent or bent in various forms. It closely resembles the 
Baryto-sulphate of Strontian of Dr. Thomson, from Kingston, Upper Canada. 
Schoharie County. The fibrous variety is found in thin veins, in the vicinity of the 
court-house. It is of a bluish colour, but is usually mixed with carbonate of lime. The 
lamellar variety is also said to occur at the same locality. 
St. Lawrence County. Crystals of a deli¬ 
cate blue colour have been found in the Rossie 
lead mine, associated with the beautiful calca¬ 
reous spar for which that locality is so justly 
celebrated. They usually have the form of low 
six-sided tables, resembling the bisunitaire of 
Haiiy. Fig. 48. P on s 90° CK; P on o 128° 
31/ ; o on o 102° 58k These crystals are 
somewhat convex on their broad surfaces, and 
are often deeply striated. Small four-sided 
tables, Fig. 49, are also found at this locality. 
I add, on the authority of Dana, the figure (50) of a 
crystal from Moss, or as it is now called, Strontian island, 
situated at the southwestern extremity of Lake Erie, where 
d this mineral is found in great abundance in the limestone. 
In colour and other characters, it closely resembles one 
of the varieties found at Lockport. P on l 157° 47 / ; don d 78° 28'; d on l 102° 69' 
{Hauy). 
Fig. 48. 
Fig. 49. 
Fig. 50. 
d 
