240 Additional Remarks on the 
In Transition Limestone. 
Rock crystals. In some of the ploughed fields these 
Quartz crystal. ; crystals have been abundant. Dr. 
Swift has one crystal, a flat six sided prism very mueh 
compressed, in length half an inch, three eights of an inch 
in width, and one line in thickness; this crystal has eight- 
= facets : also prisms with a terminal pyramid at each 
"Caleaveon ei in B hexecirel prisms. 
Pearl Spar, in 
Brown Spa 
Agaric mineral and Fossil Farina occur “iindactly i in 
all the fissures of the limestone. 
Veined e. Astratum has been found four miles 
orth west from Easton, but the quantity is not yet ascer- 
taine 
Sioinstone; of various colors, generally black. 
In the Diluvial Formation. 
Jasper, Chaicedony, Lydian Stone, Hyalite, &c. 
_ No. 126, Broadway, New-York. 
Art, VI.—Additional remarks on the Geology of a part of 
Massachusetts, +o (See Vol. VIII. No. 1.) By Prof. 
 Cnester Dewey 
Since the publication of the Geology of this section, I 
have made additional observations upon the southern pi 
and still farther south and west in the states of Connec- 
ticut and New-York. These observations will extend 
our knowledge of the geology of the country above the 
high and east of the Hudson, and continue the sec- 
tion ia the state of New-York considerably farther to the 
south, 
The alternations of mica-slate and granular limestone, 
mentioned Vol. VIII. p. 15. are more numerous than ° 
had before noticed. In passing across the direction of the 
strata in Sheffield, and in Salisbury, Conn., I observ the 
ig a: Se =r 
Se ee se 
