150 
menced with the mercury at 29°912 in. and ended at 80277 
in. It was above 80 inches on fifteen days. 
The mean Relative Humidity was 49-22’, the maximum 
being 88°6° on the 22d; and the minimum 11°9° on the 11th; 
a range of 76°7° for the month. 
On the morning of the 8d, a sharp flash of lightning 
preceded a loud clap, and then a continuous roll of thunder. 
A strong wind prevailed during the afternoon. On the 23d 
there was a severe gale from N. E. which caused much 
damage. 
Meteors were observed on the 1st, 9th, 10th, 18th and 27th. 
Lunar coronas on the 4th and 6th, both very fine. Snow 
squalls passed over on the 19th, but slight. No Aurora 
Boreales were observed this month. The London Times 
mentions one having been seen at Malta, Oct. 24th, the first 
in sixty years. 
Pror. T. EGLEesTton remarked that the Aurora men- 
tioned by Prof: Morris as seen at Malta, and which it had 
been noticed, had been of such a marked and brilliant 
character wherever seen, and which showed itself over such 
a large amount of the earth’s surface, in Europe at least, was 
very bright over the Lake of Geneva, where he was at the 
time. So bright was it, that the fire bells were rung, it being 
supposed that a conflagration was taking place. So over 
Germany and France generally, the exhibition was remarka- 
bly fine. 
Pror. D. S. Martin, exhibited specimens of a Mineral 
found occurring in veins in the Trap Rocks at Weehawken, New 
Jersey, procured by him during a late visit in company with 
Prof. Wurtz, for the purpose of viewing some of the points 
illustrative of the paper read by him, at a late meeting of 
this society. This mineral occurs associated with Calcite 
and Pyrites, and is of a black color and has a silky lustre. 
No chemical examination of it has been made, but he is 
strongly disposed to consider it to be Celadonite. If it should 
