Miscellanies. 391 
The Jolite is found at Haddam. I was accidentally made ac- 
quainted with the fact during a visit to the Chrysoberyl locality, which, 
Imade early the present season. ‘The quarryman whom I employ- 
ed brought to me, just as I was leaving the place, a piece of a rock, 
which he informed me had been blasted the year before, on account 
of a-dark fibrous mineral it-contained. ‘The substance to which he 
referred was obviously Anthophyllite; but along with it, I recognized 
handsome, violet-blue Iolite. Having ascertained the spot where it 
was obtained, I determined to visit it on the first convenient occasion, 
which proved to be during my excursion to Middlefield ; from which 
place, it is twelve miles distant. 
The Iolite locality exists upon the high ground direetly west of the 
Court House, in Haddam, distant from it only about seventy rods, 
and situated in a somewhat open space, near the meeting of four 
roads. The mineral occurs in gneiss, which here puts on the aspect 
of mica-slate. It forms in some places one third of the rock. It 
rarely, however, presents masses above one inch in diameter ; and is 
intermingled with Quartz, Feldspar, Mica, Garnet, Anthophyllite, 
Talc and Octahedral Iron. _ Its color is a rich violet blue, sometimes 
approaching sapphire-blue. It is transparent or translucent, imper- 
fectly foliated i direction, and exhibits tl dichroism 
nner 
= ee a 
Before concluding this notice, I ought to mention that Lieut. Math- 
ér has recently informed me that having collected several specimens of 
the Anthophyllite last year at this place, he afterwards recognised the 
mineral above described in connexion with them. * 
: C. U. Sueparp. 
New Haven, July 1, 1852. 
OTHER NOTICES. 
t. Notice of Eaton’s Geological Text Book, second edition, 
8vo., pp. 140. Published by Messrs. Carvill, New York, Websters 
& Skinners, Albany, and Wm. S. Parker, Troy, 1832.—The subject 
matter of this treatise has been published six times before the present 
edition. st in 1818 and 2d in 1820, under the title Index to the 
Geology of the Northern States; 3d in 1824, as the Report of a 
Geological survey of Erie Canal, taken at the expense of the Hon. 
S. Van Rensselaer; 4th as a Geological Nomenclature; 5th as a 
Prodromus, presenting a new view of classification of rocks by series 
and formations; 6th as a Geological Text Book in 1830. Now 
(1832) it appears as a second edition of the last 
