+ 
- 
Proceedings of the American Philosophical Society. AL 
The comet’s observed geocentric longitude and latitude, cleared of ~ 
aberration and parallax, and referred to the mean equinox of January, — 
1840, were as follows — 
* 
M. T. Berlin. Longitude. Latitude. * 
ety en real, ee ee ee 
25.749021 2° 67' 26:8" +-76° 99 .40M 
52, 47442 28. 44 0.6 +33 42 21 
79. 59679 Se 35. 47 348 +9 2 204 
From which he had obtained for the elements of the comet :— 
Perihelion Pass. March 13.707523 Berlin mean time. 
: 49’ 8.0" 
log. q. 0.086798 
Motion retrograde. 
Dr. Dunglison gave the particulars of a case, in which blood that flow- 
ed on dissection from the arteries of the brain coagulated, fifteen hours 
after the death of the individual. . 
June 19.—The committee, consisting of Mr. Taylor, Mr. Booth, and 
Dr. Hays, to whom was referred a communication, entitled ‘ Notice of 
the Oolitic Formation in America, with descriptions of some of its Organic 
Remains, by Isaac Lea,” reported in favor of publication, which was or- 
dered accordingly. 
In this paper Mr. Lea describes a number of fossils from New Granada 
and Cuba, which he considers to belong properly to the forms resembling 
those well known to exist in the Oolites (Jura formation) of Europe. In 
@ note Mr. Lea mentions, that after his paper was written, the work of 
the distinguished geologist, Von Buch, was received by him from the au- 
thor. In this work Von Buch describes and figures some of the fossils 
from the same formation in New Granada, taken by Humboldt nearly 
forty years since to Europe, which that learned traveller, in his “ Essay 
on the Superposition of Rocks,” considered to belong to the Jura forma- 
ton, Von Buch takes a different view, and places them higher up in 
the series ; that is, in the chalk formation. After a careful perusal of 
Von Buch’s work, and a re-examination of the specimens, Mr. Lea still 
holds to his previous opinion, that these forms belong properly to the 
Colitic series, and not to the chalk. He is the more confirmed in this 
pinion from having since been enabled to examine Captain Grant's Me- 
23s the Geology of Cutch, recently published in the Geological So- 
em 8 Transactions of London, Second Series, Vol. V, Part 2; where 
i forms represented have a strong alliance to those described by Mr. 
«Captain Grant states that the mineralogical character of the rock 
Sreatly resembles the English lias; but its fossils have been found, after 
ol. x1, No. 1.—Oct.-Dec. 1840. 6 
