— Geology, &c. 55 
out in ht masses, and might then at first be mistaken 
for garne 
Sulphate of Lead.—On page 173, vol. III. we mention- 
ed a remarkable argentiferous galena found at Huntington, 
in Mr. Lane’s mine. Connected with this galena is an in- 
crustation of sulphate of lead. It is tolerably abundant, but 
is no where in crystals or in masses: it occupies apt! 
the surface and cavities of the other ores of lead. 
metallic lead instantly by the blow-pipe, but does not ee: 
vesce nor dissolve in acids. According to Mr. Lane, it is 
equally rich in silver as the galena. This, if correct, is we 
believe a new fact; but we have not examined the ore in 
this respect. 
Black cS sgbearpeerseele crystalized in quartz, from Dr. 
Porter, of Plainfie 
Garnet Mass.—From the same. This remarkable mass is 
as large as a head, and composed entirely of garnets, individu- 
ally about a quarter of an inch in diameter. *They are trape- 
zoidal and rhomboidal : often translucent and rich in col- 
our, and truncated deeply on the solid edges. They ; are 
either in mere juxta position, ougpmented by hyalin quartz. 
Green Mica, Hinsdale, Mass.—Dr. Jacob Porter. 
Dr. Webster has discovered Hyperstene in abundance in 
the vicinity of Boston 
We have many other localities on hand, and some of thems 
are sufficiently een but they mast be postponed to . 
peters n 
