Dewey’s Geological Section. 249 
Wavellite 2 
I have lately analysed a mineral, found by Mr. Emmons, 
in an iron mine in Richmond,-in this county. It is new, or 
a new variety of Wavellite. “oe, 
Colour, greenish white ; scratches crystalized carbonate 
of lime, but is less hard than fluate of lime; infusible by 
the blowpipe ; and sp. gr. about 2. 4. It occurs in a sta- 
lactical form, or as an incrustation, presenting many small 
mamillary concretions, which, as well as the stalactites, are 
composed of minute radiating crystals, or crystaline fibres. 
Its lustre is rather weak—rather tough to break, but is pul- 
verised without difficulty in a glass mortar. It contains a 
little less than seventy per. cent. of alumine, much water, 
and a little lime and silex. From an examination of seve- 
ral specimens, the lime appears to be variable. The above 
characters bring it so near wavellite, that I am inclined to 
think it only a variety. 
When pulverised, it is nearly all dissolved in solution of 
pure potash by heat. If nitric acid be poured on the solution, 
very nearly the whole is dissolved asa nitrate. The re- 
mainder is clearly silex. If the nitrate be mixed with car- 
um. ‘There can be no doubt of the general constituents. 
* Aletter from Dr. Torrey, to the Editor, dated Sept. 22d, confirms this 
Statement, and promises a detailed analysis, which we should be glad to 
See, especially as it appears that the analysis of the Wavellite has been re- 
mine, 35, 35: phosphoric acid, 33, 40 ; fluoric acid, 2, 06; lime 0, 50; 
$¥ids of iron and manganese, 1, 24; water, 26, 80. 
