228 
CAUSES OF DRIFT. 
Report of Practice. 
TABLE IV. 
Shoeburyness, 4th Sept., 1862. 
Barometer, 29°8 in, 
Wind,—East 3 to 4 in gusts. 
Direction of Wind 
| ¥ 
| No.of round. 
ro | Hlevation. 
OMI OOF WN 
Projectile. 
Nature. oa 
lbs. 
41 
Service shot..........0. ise 
40°75 
4s Centre of gravity | 900 
3 towards base. | 
3 My 
3 Centre of gravity 
ge towards point. 
| 41 
Service shot............ | os 
40°75 
|3 Oentre of gravity 000 
& towards base. 
S 
8 Centre of gravity 
& towards point. 
Service shot........0-+ ne 
— , Centre of ee 40°75 
‘84 towards base. 6a 
8-4 Centre of gravity 
N towards point. 
is) 
rs 
ARABARAARARARBAAWWTwWwwawww 
PW KATH AWDAMSRARAIIIAEAIABWA ew 
Range. 
yds. 
1025 
1099 
1231 
1088 
1102 
1078 
1103 
1012 
1014 
1026 
1068 
1132 
2153 
2211 
2122 
2177 
1710 
1732 
1815 
1691 
1739 
1774 
1775 
1658 
3639 
3649 
2650 
2512 
2718 
2474 
Deflection. 
| Left. |Right. 
| yds. | yds. 
sae ite 
a6 eo) 
af 8 
tee 8 
1-4 
8 
319 
16 
2-4 
14 
3°2 
a5 2°8 
ee 6°6 
72 
7" 56 
aie 8 
62 
Nts 6-4 
line 
5 
2 
| eee 1:4 
fees 3:2 
10 
ane 5) 
aa 26 
and 46 
Zs 97 
9 aes 
HR 
Remarks. 
| Elev. screw broke. 
| 
| 
} Sunk in sand. 
The gun was fitted with old pattern sights, and a constant deflec- 
tion of 8’ right was given throughout the practice, so that the axis of 
the gun pointed along the range. 
