290 Miscellaneous Intelligence. 
® 
highest tension has been generally noticed in the winter season; the 
tri-daily observations (which could not be condensed) would occupy too 
much space for the columns of this Journal. 
Ozonometer.—Observations have been carefully registered twice 
having been exposed to the atmosphere, shaded from the sun, and 
rain. Asa general rule, rain or snow shows an increase, and so far 
as my own observations go, a high electrie state of the atmosphere does 
not show an increase in the amount of ozone. 
St. Martin’s, January 2 4, 
2. Tornado in Knox Co., Ohio, Jan. 20, 1854, (Cleveland “ Plain- 
dealer.”’?)—The tornado broke out not far from 3 P. M. an 
ded by a light Yain which had fallen all day accompanied by wind and 
For a short time before the tornado made its appearance the 
weather is said to have grown idly warm, and the wind to have 
lulled. The hurricane first manifested itself in the western part of 
Miller township, about eight miles west of south from Mount Vernon. 
It seemed to spring into full life and passion all at once. No serious 
traces of its work were seen until it blew down the stable and unroofed 
ferent estimates, in passing any one point. It seems to have worl the 
appearance of a mighty black pillar, reaching from earth to heavens HF 
diated by blinding flashes of lightning, and accompanied in its devas 
n. 
Discovery in Photography, (Edinb. New Philos. Journal, Jan-, 
1854).—A letter from Berlin of the 17th, says,—It is well known that 
the paper prepared for photography grows more or less black by rays 
taken advantage of this property in photographic, paper to edrvsavel 
i i Afte 
exact force of the sun’s light may be ascertained. Baron A. von _ 
boldt, M. de Littrow, M. Dove and M. Poggendorff have congratula 
