Lesiey.] 568 (Noy. 1, 
DONO 5G ig 4 ise lS wnee'n SUE ieee ee eae Un Pees 1,050 feet. 
MO ULY, VOC les gia) ipa ein shee oi cee Gules vibes se ae ce 1,055“ 
Buen DS ALINE) TOC ion ase tu a ese ce nein civtadanies oe os VaR 6 1,078. ** 
WAROUOC seat ec ieae dors ie clues ues al ceil a es 1,076: 
J ara eC eR en er are as, 1078.4 
live atid Sey. «ies ois ia gus Wie Gea ses oe eae 1,084 ‘* 
Ee ODDAG OCG si ces ag otic i Ge ona so ee re I 1085" £¢ 
Ke ea 1,090 * 
WOSACUO GE 1-05 alba: cists watlive ghieeee eel waite TIUAG ew weiner nc Pau MEw eT 1,092 +‘ 
tf UDCA Welle civ aaes | ae ie. an eis 1, 100.2 & 
and began pumping about 7 barrels in 24 hours. 
It is a pity that the above records are so defective. The intervals 
between the numbers given are in many cases large and not noted, and 
must not be taken as the thicknesses of the rocks named. 
There is, however, a positive value in allsuch records, however defective, ~ 
as may be noted by the recurrence of the red rocks in the above lists. 
These may define the position of the great red formation of the Paleozoic 
series No. IX of the Pennsylvania State Survey, the representative of the 
Old. Red Sandstone of English geologists, and the Catskill Formation of 
the New York geologists. 
In Well No. 4 it is noted once only as being struck at 1,126 feet. 
In Well No. 5 it appears at 750, 805, 826, 930, 972 and 1,026 feet. 
The thickness of the Conglomerate No. XII is accurately determined 
in Well 4 at 190 feet, and in Well 5 at 170 feet. 
The thickness of the Conglomerate No. XI1 in the salt well 45 miles 
further down the river, as determined (not with entire accuracy) from 
the Record, published on p. 65, vol. X., of the Proceedings A. P.&., 
April 1865, is 4944-3843 == 160 feet; or, if the top of XII be placed at 
the ‘‘White Sand’’ 4404 and all the ‘‘Gray Sandrocks”’ be included 
down to 666//11, == 220 feet. 
At Sligo Furnace on the Clarion (p. 68, vol. X.), the Conglomerate No. 
XII, seems to be only 117 feet thick, soft red slate of XI under it only 
3 feet thick, and the red and blue slates of [X lie 786—183 = 603 feet 
below its base, or 720 feet below its top. 
The resemblance of this to the record of Weil No. 5, given above, is 
very observable. Thus, in Well No. 5, the red rocks of IX are first 
struck at 750—45 — 715 feet beneath the top of the Conglomerate. 
In the Sligo Well (15 or 20 miles to the northeast of it), the top of the 
red rocks is 786—66 = 720 feet beneath the top of the Conglomerate. 
In the Well No. 5, the redrocks are noticed at intervals from 750 to 
1026 = 276 feet. 
In the Sligo Well, the red rocks occupy an interval of only 118 feet. 
It must be taken into consideration, however, that the lowest red rocks 
of the well No. 5 may represent not No. IX, but the Red Beds of VIII, 
described in my report to Professor H. D, Rodgers, in 1841, and pub- 
lished in his Final Report of the Geology of Pennsylvania, under the 
