Trans. N,V. Ac. Sct. 168 May 22, 
the syrup, when ready to crystallize, is strained through a flannel 
filter, and this substance is thus obtained, as a fine white or buff 
crystalline powder. He had long known it, as obtained rarely 
and in small amounts at Hanover, N. H., in the mica-slate re- 
gion ; while from the towns in Vermont, where the rocks are 
more calcareous, it is common and abundant. At Williamstown, 
there are springs that deposit calcareous tufa. 
The substance is popularly called “sap-sand” and ‘‘ sugar- 
nitre ;’ in Steele’s “‘ Fourteen Weeks in Chemistry,” it is referred 
to as silica / 
The PRESIDENT remarked upon the power of plants to select 
their food from the soil, and to form organic salts by laws and 
processes as yet largely unknown to us. 
Various minerals were exhibited by Mr. G. F. Kunz and Mr. 
W. L. CHAMBERLIN. 
Capt. J. H. MorTIMER showed specimens of granite, compact 
and disintegrated, and of the resulting kaolin, from the Island 
of Jersey ; also, a specimen of the red syenite, of the Egyptian 
obelisk set up on the banks of the Thames, similar to the one 
now here. 
The subject of the disintegration of granites and the produc- 
tion of kaolin, was further remarked upon, and examples cited 
from various localities [Mystic, Conn., the White Mountains and 
New York Island], by the PRresipENT, Prof. O. P. HupparD and 
D. S. Martin. 
A paper by Mr. Israzt C. RussELL, was then read by Prof. 
Martin, entitled : 
SULPHUR DEPOSITS IN UTAH AND NEVADA. 
Sulphur deposits of sufficient extent to attract attention from their 
economic importance have been visited by the writer at three localities 
in the Great Basin. These are located at Cove Creek, Millard County, 
Utah; near Humboldt House, Humboldt County, Nevada; and at 
Rabbit Hole on the eastern edge of the Black Rock desert in North- 
western Nevada. 
Sulphur Depostts at Cove Creek. 
Of these deposits, the most interesting to the geologist are those oc- 
curring at Cove Creek in Southern Utah. This locality is on the eastern 
border of the Great Basin and at the western edge of the region of the 
high plateaus recently described by Captain DUTTON. Eastwardis a 
