134 New localities of Agate, §c. 
Arr. V. New localities of Agate, Chalcedony, Chabasie, Sti- 
bite, Analcime, Titanium, Prehnle, &c. 
D EERFIELD, &c. In the account of the Mineralogy and 
Geology of Deerfield, by Mr. Hitchcock, in the present Nun- 
ber, it will be seen, that these interesting minerals (with 
the exception of titanium) exist in the secondary green- 
stone of that place. Wehave specimens, (through the kind- 
ness of Mr. Hitchcock,) and observe that the agates, chal- 
cedony, analcime, and prehnite, are imbedded in the trap; 
the agates are in some instances very delicate in the dispo- 
sition of their bands, and need nothing but polishing to make 
them beautiful; the same is true of the chalcedony. The 
chabasie and stilbite occupy cavities, and the chabasie is often 
distinctly crystallized in a rhomboid, so nearly approaching @ 
cube, in the quantity of its angles, that the mistake is easily 
committed of supposing them to be cubes; the crystals are 
sometimes transparent, and the largest a quarter of an inch in 
diameter. Titanium is found in Leyden ; it is the red oxide— 
very well characterized—in reddish brown crystals as large 
as acommon goose quill,* and, in some instances, perfectly 
geniculated. It is rare to see finer specimens. 
East-Haven.~ It will be obseryed, that the great ranges of 
secondary greenstone, which cut Connecticut and Massachit- 
setts in two, terminate at New-Haven, on the one hand, and 
some way above Deerfield on the other. By comparing the 
account of the termination at New-Haven (Bruce’s Journal, 
Vol. I. p. 139.) with that now published, of the termination a 
or near Deerfield, it will be seen that the geology and imbed- 
ded minerals are very similar. At East-Haven, (one of the 
branches of the greenstone of New-Haven, and within from 
three to four miles of the latter town,) chalcedony is often 
found, sometimes imbedded in the trap, (but perhaps mF 
frequently loose among the fallen stones,) which, although 
* Since the above article was written, we have received some as large ® 
a finger : 
