342 Notice of Eremite. 
Alone before the blowpipe, it instantly becomes transparent and 
colorless, but does not suffer the slightest fusion even in very thin 
fragments. Heated with carbonate of soda on a platina support, an 
opake white mass was obtained, stained in a single spot of a cinna- 
mon brown color. With borax, it fused slowly, attended by a slight 
effervescence, and yielded a transparent amber-yellow globule, 
which by flaming became paler and milky in its clearness. Heated 
with sulphuric anid 3 in a glass tube, after pulverization, it sensibly cor- 
roded the glass. It may therefore prove on more extended exami- 
nation to’ be a fluo-titaniate, but of what base it is impossible to con- 
jecture. 
For my specimens of the above mineral, I am indebted to Mr. 
Tuomas R. Dutton, a member of the senior class in Yale College. 
He discovered it last autumn in the northeastern part of Watertown, 
Conn. (on land of David Matoon,) engaged in a boulder of albitic 
granite, four feet in diameter. Mr. Duron noticed the crystal fig- 
ured above (which is still in his possession) while breaking up the 
mass for the purpose of obtaining black tourmaline, by which mine- 
ral the boulder was more or less penetrated. The crystal weighs but 
two grains, but is highly finished and perfect in its form,—all the 
faces admitting of the use of the reflective goniometer, by means of 
which instrument the angles quoted were obtained. ' 
Mr. Durron has again visited the locality this spring, and care- 
fully reduced a part of the rock to fragments, without however being 
able to discover more than five or six extremely minute crystals, whose 
form is not very distinct. ‘T'wo of these were employed in the blow- 
pipe experiments above described. The mineral appears to be im- 
bedded in the quartz and is accompanied by apatite. 
As beds of this variety of albitic granite are common in the north 
part of Waterbury, in Watertown, Plymouth, and indeed generally 
throughout the mica-slate band skirting the frontier of the secondary 
in a northeasterly direction quite to the Massachusetts line, it is 
highly probable that other localities of this interesting substance will 
ultimately be brought to light. 
The name Sanaa upon the mineral is derived from egyHla, sole 
tude, in allusion to the isolated manner of its occurrence, with re- 
Spect to other individuals of the same species. Its properties ob- 
viously bring i it within my genus eruthrone-ore, and in consequence of 
cement of both its longer and shorter terminal edges by 
nree plan a ee to six prisms beside the prima- 
, it may be desi lly, polyprismatic eruthrone-ore. 
New Haven. , May 2 2st, 1837. 
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