112 Scientific Intelligence. 
The comet, according to these elements, passed its perihelion before 
those heretofore known as Comet I, 1864, and Comet 864. 
3. Numbers of stars in the northern hemisphere.—In the last edition 
of his Wunder des Himmels, Prof. Littrow gives a summary of the num 
bers of stars that are in Argelander’s charts of the northern hemisphere, 
From N. declination, 0° to 20°, 110,987 stars. 
« “ 20° to 40°, 105,082 * 
" 8: 40° to 90°, 108,131 “ 
Classified according to magnitude there are, 
' Mag. No. of Stars. Mag. No. of Stars. 
1-19 10 6-6°9 4,228 
2-2°9 37 7-7-9 13,593 
3-3°9 128 8-89 57,960 
4-4'9 310 9-9: 237,544 
5-59 —-1,016 
There are, besides these, 60 nebule and 64 variable stars.—Hes 
Wochenschrift, Sept. 28th. he 
4. On the age of the moon's surface ; by J. Nasmyts.—The views I 
entertain on the subject in question are these, namely, that, as a direct com — 
ocean, this mighty vapor envelope must have retarded the escape inl? — 
space of the cosmical heat of the earth millions of ages after the mooa 
had assumed its final condition as to temperature. ea] 
Therefore it is from such considerations I am led to the conclusion that 
the surface features and details of the moon present to us a sight ei 
Jects the antiquity of which is so vast as to be utterly beyond the power 
Lam fain to think that in doing so the interest of what is there reve 
ter Lit. and Phil. Soc., Nov. 15 
Observatory at Greenwich, in 1853 and 1857 1 to the Re 
| ‘oF rreenwich, 57, presented to 
Astronomical Society in May, 1864, Mr. Dunkin says: : 
