50 Geology and Mineralogy of a part of Massachuseits, &c. 
Windsor, in Worthington, on Plainfield, and in the 
towns in the same direction in Vermont. In Florida, 
some of it is very hard, comes crystals of sulphuret of 
iron, and is exactly like specimens from Zoblitz in Saxony. 
With the serpentine is often found magnetic oxide of iron, 
hyalite, chalcedony, tale, asbestus, &c. 
28. TALC. 
Var. 1. Common. 
White, greevish white, and deep green ; often in large 
folia with rhomb spar in the bed of steatite in Middlefield— 
beautiful. In masses of small scales with spinolte. In 
Chester, brown talc forms veins in mica-slate-—Emmons. 
In Savoy is a narrow stratum of brownish or dark gray 
talc, which exfoliates, even in the fame of a condlits much 
more than this mineral usually does. A very thin leaf 
will often divide in this way into fifty folia, swelling into a 
large mass and winding about in a curious manner. It 
contains ten per cent. of water, to which this great exfolia- 
tion is probably owing, as this is a much larger quantity 
than is given in any analysis of the mineral. This talc is 
doubtless the same as that mentioned in this Journal, Vol. 
VII. p.55. Ifa new name be paneshery for this variety, 
ean it be Vermiculite with propriety? For this is an estab- 
lished name of certain organic remains found as petrifac- 
tions. 
Remark.--This tale fuses into a dark colored enamel, 
The books say that the enamel of tale is white. The lighter 
colored varieties do indeed melt into a white enamel; but 
the darker give a dark enamel, without exception, so far as 
I have examined; and I bate tried several from different 
places which did a exfoliate in the remarkable manner 
just mentioned. 
Fibrous Talc. 
The lamina sometimes divide so as to present this sub- 
variety. 
