THE ROYAL ARTILLERY INSTITUTION. 
409 
Table Y. 
OBSERVED VELOCITIES. 
Cartridge. 
Projectiles. 
Observed velocity 
at 40 yds. 
<d 
«s £ 
CD .Th 
a § 
be 
Gun. 
ce 
r=3 
O 
Remarks. 
Length 
(without 
wad. 
; Dia¬ 
meter. 
Weight. 
Dia¬ 
meter. 
i 
Brand 
powdei 
1 
2 
3 
O o 
C3 (D 
<D 
S 
■ 3:1 
u 
lbs. 
in. 
in. 
lbs. 
in. 
Rifle, 
ft. 
ft. 
ft. 
ft. 
ft. 
7-in. shunt. 
12 
12-0 
6*5 
109-40 
6-96 
1. Gr. 
1177-3 
1207-1 
1221-4 
1201-9 
1209-0 
A grum¬ 
Lot 728 
met wad of 
// 
20 
17-5 
n 
n 
n 
n 
1432-6 
1415-7 
1420-0 
1422-8 
1432*0 1-9 in. thick 
// 
25 
20-0 
n 
n 
n 
a 
1485-3 
1503-6 
1511-3 
1600-1 
1510-0 attached to 
// 
12 
12-0 
a 
99-50 
a 
Lot 725 
1277-8 
1273-1 
1269-6 
1270-2 
1279-0 each cart- 
// 
20 
17-5 
n 
it 
n 
n 
1508-2 
1489-8 
1512-9 
1503-6 
1515-0 
ridge. 
II 
25 
20-0 
n 
n 
n 
n 
1563-9 
1557-4 
1557-4 
1559-6 
1571-5 
7-in. French 
12 
12-0 
n 
100-00 
6-91 
n 
1274-2 
1286-1 
1294-4 
1284-9 
1293-4 
n 
20 
17-5 
n 
// 
n 
a 
1474-9 
1461-6 
1483-9 
1473-5 
1484-0 
it 
25 
20-0 
n 
// 
n 
n 
1536-5 
1542-9 
1534-9 
1538-1 
1549-2 
12-pr. Arm¬ 
strong B.L. 
standard gun 
1*5 
... 
... 
11-75 
3-074 
Lot 728 
... 
... 
... 
1193-2 
1206-0 
rST*rf 
C Mean of 
i 5 rounds. 
II 
" 
// 
n 
Lot 725 
... 
... 
... 
*1148-3 
1158-0 
do. 
* Velocity at 100 fit. 
11. It appears from a comparison of cost of projectiles as submitted by 
Sir William Armstrong for his pattern, with the estimate of Superintendent 
Eoyal Laboratory for similar projectiles made by him for the Trench gun, 
that the former cost about Is. 6d. a piece less than the latter, but as before 
stated this difference would probably be reduced by further experience in the 
manufacture of Trench projectiles. 
Table YI. 
COST OE COMMON SHELLS. 
Per 1000. 
£ s. d. 
fLancaster’s . 622 10 6 
Scott’s... 625 10 10 
Royal Laboratory -j French with Major Palliser’s studs of the") g ^ 
fjFrench same form as shunt ... 634 12 10 
If made in R.L.upon~'l 
the assumption that the 
relative cost is 10 per ^Armstrong’s shunt . 622 O 0 
cent less than that of 
the 7-in. B.L. shells. J 
E.O. Co. Estimate. ...Armstrong’s shunt . 663 14 0 
