C. T. Jackson on minerals from the Emery mine of Chester. 107 
short lines at d, d. The old “ American oil sil near Burks- 
ville, originally bored for salt water, may be taken as an exam- 
his, from top to bottom, is within se Nashville group. 
Its mouth is not far from 40 feet below the level of the Black 
Slate. At the depth of about 175 feet this boring tapped an oil 
reservoir, from which flowed out, at a minimum estimate, 50,000 
barrels of oil. The recently bored “rete creek well, which 
. In the Trenton iinestoeai Some boring has been done in 
thie series, but as yet no ee of any note have been dis- 
- covered, at least in Tennes 
Nashville, Tenn., March 19th, 1866. 
ArT. XIX. —Analyses ch some minerals rege the Emery mine of 
Chester, Mass, ; communicated by Dr. C. T. JACKSON. bse 
a letter to one of the Balto) 
q ar 
3 Scratching quartz crystal readily. It is associated with crystals 
: of black tourmaline. It is very compact, fine granular in 
texture, with a conchoidal splintery fracture, and has G. = 2586, 
H.=75; the color slightly greenish white. I obtained for its 
PRE a n, 
i 
Silica, - - - - - 62:00 60-00 
Alumina, - - - - 24°40 25:00 
Morris ce Ae eC 0 
Magnesia, «© - a . “ . 
ee ee 
Water, - - - 
9°67 
In No. 2 there was a trace of oxyd of iron not Sige 
2. Analysis of Margarite, by JOHN C. J Ackson,—The margarite 
of Chester has, G. = 3°08, H.=8%5-4. The = ‘afforded : 
Sili ney * a bat 29° 84 eae se 
Alumina, - - - ~ ~ oS 53°84 f os 
Lime, - ‘ > 3 = é - 10°38 
- : : : : - 0-24 
Alkalies, soda chiefly, - 7 - * - 748 
a = L 2 é E 2 3: 
Sesquioxyd of iron, - - - ge 
