Hail Storms. 
35 
‘Tshall now conclude this paper with the following table, computed 
from the formule on page 32, and showing the state all the epee 
ae of the three an AC, GS, and és. 
Kgl of Refrac- Tnclination of oclinstion: ort nc. 7 
Angle“ of Inci-| tion at firstsur-| plane o lane of po- | plane of po-— 
on the} face, snd angle| larization of | larization larization of | 
— satlece: * ‘incidence on} AC Fi S Fig: bs Fig. 3. =] 
_ oO « ; o] / ie} oO é nlite 2 
0 0 0 0 45 0 45 0 45 0 
a2 0 20 33 45 34 32 20 a2 51 . 
40 0” 25 10 45 58 124° 12 24 56 
45 0 27 55 46 17 17 49 18 38 
66 30 33 30. AY. 22 70... Q 0 0 
67. 0 37 34 48 57 18 20 20 50 
70 O 38 30 49 33 23 34 27.«CG6 
75 0 39 46 50 45 32 22 37 48 — 
78. 37 40 29 51 49 38 10 44 59 
42...:0 40 33 51 56 38 49 45. 46 
80. 0 40 42 52 16 40 27 47 46 
$3 0 | ie 53 21 44 39 40 
86 30 41 23 | 54 47 50 58 42 
90 0 41 58. 56.29 | 56-29 AD < 
 Allerly, December 31, 1829. : : : = 
Arr, VL. in ‘Hail Ssacbas ; ce A. 
eorgi a. 
Jones, M. D. of Augusta, 
TEs storms very often occur in the Southern States during the 
spring, or the first months of summer. 
when the thermometer ranges between 70° and 80°. 
also more _f 
nt and 
occupies the above range. 
In hail storms I suppose it highly probable, that at 3 large drops 
of rain descend, till they come in contact in their passage, w: 
They are most frequent 
* Lightning is 
terrible in ahe south when me thermometer 
with a 
much colder current of air, when they suddenly freeze, in the act 
of doing which they expand, producing a hollow globular hailstone, 
which enlarges as it falls, by the aggregation and freezing of other 
drops of water, which seem to be drawn to it by some kind of at- 
traction. They in this way enlarge, until before they reach the earth, 5 
they often attain a most astonishing size. They have been seen to 
fall in some places, of the size of hens’ eggs, and of still larger 
