SHORT NOTES ON jPllOfESSIONAL SUBJECTS. 
GO 
In the last Table, corresponding to 1499 f.s. (the nearest velocity to that 
observed) we find 2200 ft.; adding to this 3000 ft. we obtain 5200 ft., opposite 
which in the Table we have the velocity 1252 f.s. The velocity required therefore 
is 1253 f.s. 
Ex. 2. A shot from a 9-in. gun at 200 yds. is required to strike with the same 
velocity as would be given by a charge of 43 lbs. at 1000 yds. What should be 
the charge ? 
From the first Table we see that 43 lbs. gives an initial velocity of 1314 f.s. 
this velocity is reduced to 1162 f.s., at 3000 ft. (by the second Table) : this is the 
striking velocity. The initial velocity at 600 ft. (by the same Table) should be 
1190 f.s. The charge therefore clearly (by the first Table) is 30 lbs. 3 oz. 
Table shewing the connection between initial velocity and weight of charge for 
the 9-in. M.L. rifled gun, with the service shot. Obtained by interpolation. 
Charge. 
Initial velocity. 
Charge. Initial velocity. 
Charge. 
Initial velocity. 
lbs. 
20 
21 
22 
23 
24 
25 
26 
27 
28 
f.s. Ai 
959 + 31 
99° + “ 
1019 + 2 ® 
1046 1 
1005+ 
11171 Jo 
H371 jo 
1165 + fg 
lbs. 
29 
30 
31 
32 
33 
34 
35 
36 
37 
f.s. Ai 
1171 , lft 
1187 tH 
1202 
1215 + }“ 
1227 til 
12381 jo 
1248 t 9 
1257 + 9 
1266+ g 
lbs. 
38 
39 
40 
41 
42 
43 
44 
45 
f.s. Ai 
1274 8 
1282 + q 
1290]; ° 
1298+ ° 
1306+ ° 
1314 1 « 
1322+ ° 
1329+ ' 
Tables shewing the velocities of the service shot (ogival head) for the 9-in., 8-in., 
and 7-in. M.L. rifled guns at intervals of 100 ft., supposing the shot to move 
in a straight line. 
9-in. M.L, rifled gun. 
Diam. of shot, 8*92 inches. Weight of shot, 250 lbs. 
Distance. 
Yelocities 
0 
100 
200 
300 
400 
500 
600 
700 
800 
900 
feet. 
f.s. 
f.s. 
f.s. 
f.s. 
f.s. 
f.s. 
f.s. 
f.s. 
f.s. 
f.s. 
O 
1400 
1394 
1387 
1381 
1375 
1368 
1362 
1356 
1350 
1344 
1000 
1338 
1332 
1326 
1320 
1315 
1309 
1303 
1298 
1292 
1287 
2000 
1281 
1276 
1271 
1265 
1260 
1255 
1250 
1244 
1 1239 
1234 
3000 
1229 
1224 
1219 
1214 
1209 
1205 
1200 
1195 
1191 
1186 
4000 
1181 
1177 
1172 
1167 
1163 
1159 
1154 
1150 
1145 
1141 
5000 
1137 
1133 
1128 
1124 
1120 
1116 
1112 
1108 
1104 
1100 
6000 
1096 
1092 
1088 
1085 
1081 
1077 
1073 
1070 
1066 
1062 
7000 
1059 
1055 
1052 
1048 
1045 
1041 
1038 
1035 
1031 
1029 
8000 
1025 
1021 
1018 
1015 
1012 
1009 
1006 
1003 
1000 
997 
9000 
994 
991 
988 
985 
983 
980 
977 
974 
972 
969 
10000 
967 
965 
962 
960 
957 
955 
953 
950 
948 
945 
