716 Scientific Intelligence. 
Ill. ASTRONOMY. 
1. Observations upon the ate ok oy Seer << at the. Ob- 
servatory of Yale College; by O. T. Surrman.—The comet 
Pons-Brooks has been followed, at the Ghectaor y, by the equa- 
‘torial of 8 inches aperture (present ted by E. M. Reed, Esq.) 
as steadily as circumstances gataiogs Up to date (Dec. 10th) 
thirty-four observations of position have been obtained; six 
95” by 64” in extent, light almost pais diffused. 
nucleus. The direction of the elongation was about N. 15° 
Sept. 27—-Oct. 3, the rae ae ~ Aa brighter while the 
ity, the cick of Deuce baie about S. 20° E. Oc t. 24— 
27, there was a suspected tail about 10’ in extent, which had 
surrounding it and a nebulosity of about 3’. aoe 17-19 
there was again a suspected developm bh of the tail. Nov. 24 it 
again presented a form similar to Noy, 2d, but with a fourth dis- 
tinction in brightness, oe dimensions being (PROX Say T4 for 
coma 50”; inner nebulosity 8’; outer nebulosity 10’. On days 
immediately following, the distinctness of the third ese was 
lost and the coma became somewhat radiated. Dee. 3d, the coma 
the slit being opened rather wide. The second head from the 
red end was the rightest, the third band was the next brightest, 
and the bed refrangible e band near the red portion of the spec- 
trum was the faintest. All three bands ended in a faint point. 
They were of unequal lengths; the brightest being the longest, 
the least refrangible next, and the band toward the more refrangi- 
ble end of the spectrum the shortest. 
