Miscellaneous Bibliography. _ ie 
ether, causing a warm period in each month, the dog days and the Indi- 
an summer; and that in the middle of these two periods it causes the 
retara of the August and November meteors. 
Dr. Wilcocks has brought together and framed into a plausible hy- 
pothesis many facts, some of them hitherto not connected with any 
theory. But we do not believe that astronomers and physicists will be 
likely to accept his explanation. What he says relative to the seasons, 
and to the shooting stars seems peculiarly open to criticism. Why, for 
instance, the two periods of heat (supposing them to have an existence,) 
should not, according to his hypothesis, be equi-distant from the 5th of 
June and 5th of December, the two days when the earth is in the sun’s 
equator, he does not explain. For the middle day of one period he names 
the 11th of August, which is 67 days from the 5th of June, while that of 
the other, which he ealls the 12th of November, is only 24 days from the 
5th of December. In what way the periodical star-showers could possibly 
be “ge siag by such an ether wé find it difficult to imagine, #. 
es Magnetic observations ; Solar spots; Bessel’s period 
functions ; caleulation of the depth of the Pacific from the earthquake 
ae oda; Origin of the Florida Reef, by c 
Eulogy on Joseph S. Hubbard ; by B. A. Gousp, 44 pp., 12mo, 
Say eulogy was written in compliance with the call of the National 
cad 
Christian spirit, had accomplished much for science. The tribute is ad- 
Mirable as a bio raphical notice, appreciative, eulogistic but not beyond 
i and of special value as a chapter in the history of American 
rohomy, 
9. Chambers’s Encyclopedia.—A new volume— the Sixth —of this 
Popular Encyclopedia, Seon well filled out and illustrated in the de- 
ttments of science, as well as in other varied branches of knowledge, 
“® just been issued by the American publishers, J. B. Lippincott & Co., 
: vadetphia. The volume (826 pp.) carries the alphabet nearly 
tough N, 
10. Abstracts of Meteorological Observations made at the Magnetical 
Observatory, Te ail “Canada West, during the years 1854 to 1859, in- 
lusive, 136 pp. Ato. Toronto, 1864. Results of Meteorological Obser- 
feoo maze at the Magnetical Observatory, wet during the years 
90, 1861 and 1862. 84 pp. 4to. Toronto, 1864. eee 
M. Review of prone Breas: by S. F. Batrp.—The publication and 
issue of this work has already reached the 148th page. 
