Mineralogy and Geology. 257 | 
any notable quantity in the water, has in process of time crystallized 
out to a considerable extent, and now exists in the bottom of the lake 
in the form of distinct crystals, which are of all sizes, from microscopic 
dimensions up to two or three inches across. These crystals form a 
layer Immediately under the water, intermixed with blue mud, of vary- 
Ing thickness ; as observed in the coffer-dam sunk in 1863, the layer of 
it will be made available, It is the largest deposit which we have seen 
in the State, covering several acres of ground; but to ascertain its value 
and determine the quantity of pure sulphur it contains, it would have to 
be dug into at various points. 
Near the sulphur bank, just at the edge of the lake, is a hot spring, of 
which the outlet is, even at low water, partly beneath the lake, so that 
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was the estimated yield anything like as great as he made it, namely, 
three hundred gallons per minute. . 
The water of this spring, as analyzed by Mr. Moore, is found to be of 
@ remarkable character ; his analysis is subjoined. 
: Grains in one gallon. — 
Chlorid of potassium, ites ee; 
Chlorid of ee ; gh cones on aveen 8462 
Todid of magnesium, .....-+-+++ seerererestett + 
Bromid of magnesium, : Coane cous 2 
aseeeaw eee 
% Bicarbonate of soda, ......2.++++ ie 
Ax. Jour. Sc1.—SzcoxD Vor. XLI, No. 122.—Mancn, 1866. 
33 
