No. 200.] 
63 
which was commenced by the Messrs. Longmuir in the hope of obtain- 
ing a supply of pure water for their brewery in the immediate vicinity. 
One of the proprietors informed me that the evolution of sulphuretted 
hydrogen, was first observed at the depth of fifty feet below the surface, 
which would be within the strata of calciferous slate. 
The temperature of Longmuir's spring, is usually 52° F. The water 
when heated to about 100°, deposits sulphur and carbonate of lime. 
The specific gravity is 1 . 00407. One pint of this water contains. 
Carbonates of lime and magnesia with a trace of ox- 
ide of iron, 1.48 grains. 
Chloride of sodium, 6.52 " 
Sulphate of soda, 6.99 « 
14.99 " 
Gaseous contents, sulphuretted hydrogen, 2 . 16 cubic inches, with a 
small quantity of carbonic acid. 
To show how abundantly sulphuretted hydrogen is evolved in this 
district, it is only necessary to notice the Caledonia springs in the town 
of Wheatland, where a large volume of water gushes out of the earth, 
forming a stream nearly one quarter the size of the Genesee river at 
Rochester, the whole being slightly impregnated with this gas. 
Genesee Springs. — In the county of Genesee, we have, near North 
Byron, a sulphuretted spring, the gas of which is so copiously given out 
as to be inflamed; and in the southeast part of the same town are springs 
of a similar kind. 
A very remarkable locality in this vicinity deserves to be particularly 
noticed here, as the occurrence is undoubtedly to be referred to the same 
general agencies which are concerned in the production of sulphuretted 
hydrogen. I refer to the Sour Springy so called, which exists in Byron, 
near the canal. The acid is produced from a hillock about 230 feet 
long and 100 broad, elevated four or five feet above the surrounding 
plane. According to Prof. Eaton, the strenght of the acid increases in 
a drought. He states, that when he examined the locality considerable 
rain had recently fallen, and the acid in most places was very dilute, 
but in some it appeared to be perfectly concentrated, and nearly dry in 
its combination with the charred vegetable coat. In this state it was 
diffused throughout the whole hillock, which was every where covered 
with charred vegetable matter to the depth of five to thirty or forty 
inches, occasioned by the action of the sulphuric acid. Wherever holes 
