126 Scientific Intelligence. 
The position of the Pottsville “ foot-marks” is about 8500 feet below 
the upper part of the coal formation there, which is 6750 feet thick, 
according to Prof. Rogers, and they are in the ‘red shale,” (his No. 
11,) the intermediate siliceous conglomerate (No. 12) being stated by 
him to be 1031 feet thick at Pottsville. ‘These measurements would 
bring these foot-marks about seven hundred feet below the upper sur- 
face of the old red sandstone. 
mass of coal plants exists immediately on the northern face of the 
heavy conglomerate, here tilted ten degrees over the vertical, and form- 
ing the crest and “ back-bone” of Sharp Mountain. This conglomerate 
the road below Pottsville. On the same road side, about 1735 feet 
from these coal plants, is the face of the rock, tilted slightly over the 
yeas and facing the north. lt is proper to state, that the limestone 
of the old red sandstone exists here, about two feet thick, and underlies 
thea: ** foot-marks” sixty-five feet. I was fortunate enough to obtain 
these 1 impressions in a large and heavy slab, which is now in my pos- 
session 
On the slab there are obscure remains of other organized matter 
small spots, with ate nege: radiations, and a small bone or reed- like 
mark, which is difficult to make out. 
4. Gold on the farm of Sautel Elliot, Montgomery per Md., 
thirty miles from Baltimore, (Proc. Amer. Phil. Soc., 1849, p. 85.)— 
The Jocality has been known but a few months s, and appears to be val- 
uable. Three samples examined at the mint, yielded as follows :— 
No. 1 yielded at the rate of 744 grains per ewt. of ore, or $610 00 per ton. 
No, 2 . 960 “ 78720 “ 
No. 3 xg 206 r 168 80 “ 
Average, 636 522 
The quartz which forms the matrix of the gold, crops out amidst a 
decomposed talcose slate, so that quarrying is very easy. Ores of cop- 
per and iron are also presen 
Messrs. Bowman & Ebbett, of New York, state that much gold ap- 
pears to be disseminated throughout the gangue; in so minute a state 
of division, as to be invisible to the naked e 
5. Gold of California, (from a letter to one of the editors from Rev. 
C. S. Lyman, dated, San Francisco, Oct. 29th, 1849.)—The gold the 
past season has turned out much better than was expected. Many rich 
deposits, in all parts of the mines, have been opened. On the middle 
fork of the Rio de los Americanos, two men recently dug $28, 000 in 
two months. saw a portion of it in lumps of the size of hens’ eggs 
as the Mokelemnes. But for these few fortunate diggers, there are 
thousands who scarce earn a dollar a day. From the best pgp 
I can get, Asean workers have not averaged more than eight or 
ten dollars a —some estimate it much lower; multitudes do not pay 
expenses, seeticilanky clerks, professional men and others unaccus- 
‘tomed to hard work. 
The gold has at last been discovered in place—in veins penta 
quartz beds—on the Mokelemnes and in the vicinity of the Marip 
