292 . Miscellaneous I, ntelligénce. 
(6.) Miscellaneous. 
On the frozen wells of Owego, Tioga Co., N. Y. By Prof. Joun 
BrocKLE 
oles on the ie os Gunpowder Explosion. By Prof. Denison 
OumsteD, of New 
On the effect of hima radiating substances with combustible ma- 
terials. By Prof. JosepH Henr 
Account of Experiments on the alleged spontaneous separation q 
Alchohol and Water, made at the Smithsonian Institution. By Pro 
Henry. 
Mode of testing ui ae materials, and an account of the marble used 
in the extension of 1 apito ol. By Prof. He 
an Index o esos on endicots of Mathematical and Physical 
Science. By Lieut. E. B. Hun ae ¥ 
On the use of ps stole toda ‘for facing the steep slopes of parapets, 
terraces, &c. By Lieut. E. B. Hun r, UL 
Contributions.to the Slory of Sight. By Dr. T. C. Hitearp. 
Laws of reproduction considered, with special reference to the mar- 
riage of near blood relations. By Rev. Cuares Brooks. 
4. The Climate aa San Francisco, for the year 1854; by H. Gis- 
sons, M.D.—The gan with very fine weather. ‘On the 5th, 
was a severe poet ie > which damaged the shipping in the harbor. ie 
few cold mornings followed, and on the 12th the rains set in. 
that date to the 24th, rain fell on 9 days, to the depth of 4} saa 
The rains were valid, and several times a accompanied with hail, and 
snow covered the distant mountains. The coldest weather on 
cord was at this time. On the 19th, 20th and 2lst, the thermom- 
an stood at 31,25 and 31. At noon on the 20th, it rose no higher 
M. 45°26, being the coldest month on seth nite bs. e. since ere win- 
ter of 1849-50. The greatest heat was 69, the extreme of cold 
. The prevailing winds were N, NE, and 
It should be mentioned, as a rare ‘inadiehoc: that Ns fell on the 
morning of the 15th, so as to cover the ground and it lay for an hour. 
In the winter of "49-50 the ground was covered vk hail or snow in 
like manner. 
raty was rather warm. The — at Sunrise was 47° 193, at 9 
. 50°86, at noon 59-21, and at 10 p.m. 49-07. The extreme 
was 69, of cold 38. Rain fell on no ‘idee than 13 days, and in the 
caahon Ss, NW aad N, in the order ‘named as 
Our high wind occurred from SSE. 
