Sal 
296 Tornado in N. E. part of Ohio, Feb. 4, 1842. 
observations. Those recorded in my former article range between 
S. 54° W.; South; and 8. 68° E. Near the centre were two 
trees, S. 82° W., N. 86° W. These trees, it will be observed, 
lie parallel with the track and almost directly in the centre. (See 
this Journal, Vol. x11, p. 12.) This southwest wind on the north 
side of the track probably preceded the southeast, as the westerly 
wind preceded the easterly on the south side. We may then pro- 
ceed to construct a diagram of the wind’s motions as at Mayfield. 
The result is shown, Plate IV, Fig. 7. The motion is decidedly 
centripetal, with a slight tendency to revolve with the sun. 
In order to obtain further light on the subject.of tornadoes, I 
have paid some attention to those small whirls which are not un- 
common in warm days, which last but afew seconds, and elevate 
light objects, such as leaves, dust, etc. March 31, 1838, about 
113 A. M., I was walking alone in Hudson about half a mile : 
west of the college. My attention was attracted by a roaring 
noise inaneighboring wood. I presently perceived a small while 
wind advancing into a cleared field, and marking its course by Bi a. 
dead leaves which were elevated into the air to the heightof 
pretty tall trees, and which revolved spirally upward in the direc- 
tion of the sun’s motion. The whirl advanced from 8. 30° E. 
to N. 30° W., which was the direction of the wind at that time 
in this place, being somewhat of a ravine, although upon the hill 
at the college soon after, the wind was northwest. I followed it 
without any difficulty for several rods, until it came to 4 wood, 
where its force was very much broken, and it soon disappeared. 
I stood in the middle of the whirl and neat its centre, and. the 
wind blew with such force that I was obliged to @id my hat on, 
although the whirl advanced not more than three or four miles 
per hour. It crossed a small brook about five feet wide quite 
slowly, throwing up spray and a considerable quantity of water 
about a foot high, and for a diameter about the same. It lasted 
but a second or two, for the whirl passed nearly perpendicularly 
across it. King & 
- Aug. 22, 1838,2 P.M. A whirl formed in the road direetly 
in front of the college. It moved arod or two from north to south, 
whirling in the direction of the sun. ‘The motion was quite rapid; 
and the whirl increased in dimensions from below upwards. Dec. 
29, 1838, 10 A. M., a snow whirl revolved with the sun. July 
“HL, 1839, 10 A. M., a small sand whirl revolved in a direction 
