130 “Indurated Bitumen” in the trap of the Connecticut valley. 
[188] apparent. 
1878. Ham. Coll.m.t. a. 6 
. m. h. m. 8. 
June 18, 10 30 — 15 40 28 —1%° 641” Uncertainty +10” 
| 5 AS Saag | 15 39 56 16 5971 +30” 
20, 10 30 — 15 39 29 16 52°3 +30", 
25, 12 23 4 15 37 23-01 16 22 51:0 18 comp. by ring micr. 
27, 11 9 54 15 36 45°74 16:12 ..9°8 fe & 
28, 10 45 49 15 36 29°20 16 6 524 9 comp. by filar micr. 
1 “ “ce 
i) 
fed ped 
oO 
_— 
ol 
wo 
bo 
— 
oO 
w 
for) 
pad 
iP 
Se 
lor) 
ee 
[=r] 
bo 
CON 
hi. 
? 
2 : 
3004 10 12 48 15 36 15 57 a comp. by ring micr. 
July 1, 102813 15 35 50: 10 —15 52 23-5 4 
The comparison stars of June 28 and 30 require a re-deter- 
mination by some meridian circle. 
Arr. XIV.— On “ Indurated Bitumen” in cavities in the trap of 
the Connecticut valley. From the Report on the Geology of 
Connecticut, by Dr. J. G. Percrvat. 
Dr. Percivat’s observations on oe occurrence of what he 
called “indurated bitumen” in the of Connecticut valley, 
shacaliig veins in vei pet whose ores are sulphides of copper, lead, 
zine and iron, 3 atrix of “sulphate of barytes, quartz and 
calcarevus spar,” “occasionally contain seams or nodules of indu- 
rated ort similar to that already noticed” on p. 318, an 
that in the “altered rocks oie Oa ven trap ieee sandstone— 
various minerals are often found, including “hyalite, epidote, 
chlorite, brown spar, fluor spar and indurated bitumen.” Ag: 
p- 320, he remarks that in the trap region of Berlin and Hartford, 
there are in the shale a dikes that bing of weer gee 
shale, “ through ah points of bitumen are disseminated, 
already noticed in a variety of ainyodaloid ;’ and that in iG 
brown and Hiuninons shale accompan these dikes, there are 
“also included seams of bitumen with brown spar and sometimes 
with fluor.” 
The above are general statements as to the pris modes of 
occurrence of — “indurated bitumen _ In the course of the fol- 
ee 
ar the 
north point of a tide of any geulang ee spars. of paneer 
bitumen (considered as coal) was found on the back of th amyg- 
daloid, the pores [amygdaloidal cavities] of which in the iwiginaey 
