4 
a 
44 Prof. Loomis on the Hail Storm of the first of July, 1853. 
These bearings were measured at various points upon a portion 
of the track about two miles in length; and it will be noticed 
that there is not a single instance of a tree which was prostrated 
towards any point between East, North and West. The bear- 
ings extend from east, through south, to S. 70° W., a range of 
160 degrees ; but I found only one instance of a bearing approach- 
ing nearly so close to the west point. With but one exception, 
the bearings were all confined between east and S.20° W. The 
wind did not then blow from every point of the compass indiffer- 
ently, at least not with sufficient force to prostrate trees, but it 
blew only from the northward, including northeast and northwest. 
Neither was the wind a simple rectilinear current. What law 
then did the wind observe? Was its motion merely centripetal ? 
Did it revolve in a whirl? Or did it follow some other law? 
In order to decide these questions, I attempted to apply the 
method which I had successfully practised in the Mayfield tor- 
nado of Feb., 1842. This method consisted in selecting groups 
LAY SE nd da eS nr yy) te ee oe 
Ss a ee i ee ee 
Oe eee ae . 10 E 8.60 E. 
The first four cases present no angle greater than 30°; the 
fifth case presents an angle of 130°; that is, the two trees were 
turned in nearly opposite directions. 
From a comparison of all the facts, I conclude that the wind 
blew first from the northeast, and that this current was succeeded 
y a north and presently a northwest wind. The following are 
my reasons for this conclusion. ' 
1. The fifth case of interfering trees, just mentioned, taken in © 
to 
S. 50° E. 8. 40° E. S. 20° E. 8. 40° E. 8. 70° W. 
ore 2.4 8.45 40 E. 4.48 6.4 
clusion. We find that one large tree was prostrated with its top 
turned towards a point S.70° W. Upon it lay another large tree 
with its top turned S. 60° E. We may safely infer that these 
a point N. 70° E., and was succeeded by a curreut from N. 60° ; 
W. In each of the other cases of interfering trees, the angle of _ 
crossing Was so small, as to convey no very distinct information — 
