AIR TO THE MOTION OP ELONGATED PROJECTILES. 44 L 
Meteorological Register, Shoeburyness. 
Date. 
Hour. 
Barometer. 
Thermometer. 
Wind. 
Weather and Remarks. 1 
A.M. 
P.M. 
j Beading. Temperature. 
Dry. 
Wet. 
Direction. 
Force. 
1866. 
Sept. 25th j 
Sept. 26th -j 
Sept. 27th -j 
r 
10 
10 
3 
3 
3 
; 3005 
3005 
30-05 
3000 
29-95 
29-95 
61 
61 
61 
61 
59 
60 
61 
61 
61 
60 
56 
59 
54 
55 
59 | 
59 
56 
58 
S.W. by S. 
S.W. by W. 
s.s.w. 
S.W. by S. 
N.W.byW. 
1 W -‘ 1 
2 
3 
3 
2 
Clear. 
Clear. 
Hazy. 
Ditto. 
Ditto with rain. 
Hazy. 
Direction of firing from the North to South. 
b is subject to considerable variations for large variations in v. Por ogival beads struck with a radius of 1| 
diameter of the shot, fired with great steadiness, the following values of v and b have been found. 
V . 
W 
u 
900 
0-0000000604 
950 
0-0000000640 
1000 
0-0000000720 
1050 
00000000868 
1100 
00000001005 
1200 
0-0000001085 
1300 
0 0000001046 
1400 
00000000977 
1500 
0-0000000956 
1600 
0-0000000925 
It thus appears that M. Helie’s value of 2b or c is true only for velocities about 950 f.s. — Aug. 1, 1868.] 
MDCCCLXVIII, 
S P 
