TIIS ROYAL ARTILLERY INSTITUTION. 
139 
March 12, 1861.—Barometer (32°), 29-520. Thermometer, dry, 45°*0; wet, 43°*1. Elastic force 
of vapour, -251. Humidity, *84. Weight of cubic foot of air, 541-4 grains. To ascertain the 
velocity of the Armstrong 12-pr. shell in function of the weight of the charge.— continued. 
: 'S 
s 
A 
o 
Projectile. 
Reading of 
Needle. 
Velocity. 
Sg 
Re- 
Range. 
Remarks. 
& 
si 
& a 
bC 
cl 
rS 
o 
Nature. 
Dia¬ 
meter. 
Weight 
coil. 
Dis- 
juuctor. 
Pro¬ 
jectile. 
At 
30 yds. 
Initial. 
lbs. oz. 
lbs. oz. 
O 
o 
ft. 
ft. 
yds. 
rsi 
1 4 
3-084 
11 9 
10 
3 
39-80 
114*80 
996*7' 
204-0 
32 
11 
6 
39-80 
115-50 
986-1 
206-8 
33 
13 
6 
39-85 
114*75 
997*5 
211*1 
34 
' ;; 
12 
9 
39-00 
113-55 
1005*6 
1005-1 
-Mean - 
997-8 
210-0 
35 
• 
55 
,. .. 
13 
3 
39-10 
114*15 
996-5 
200-7 
X' 
36 
35 
J2 
13 
6 
39-20 
115-05 
983-1 
210*5 
37 
,13 
4 
39-20 
113*20 
1011-0 
210*3 
38 
.. .. 
# 
13 
3 
39*30 
114’10 
997-3 
204-9 
39 
9 99 
s 
99 99 
12 
9 
39 15 
114*10 
997-3 
203-7 
140 
pS 
9 99 
.P 
59 99 
13 
0 
39-25 
113-45 
1007*2, 
211*1 
f41 
m 
1 6 
rS 
99 99 
14 
0 
39-15 
111-20 
1042*4' 
235-6 
42 
& 
99 
99 59 
13 
9 
39-25 
111-15 
1043-2 
236-0 
43 
in 
99 99 
Ph 
14 
9 
39-20 
110-05 
1061*1 
235 3 
44 
| 
99 
15 
3 
39-15 
110-55 
1052-9 
1058*0 
f'Mean < 
1050-2 
240-9 
M 
45 
99 
© 
95 99 
14 
9 
39-10 
110-20 
1058*6 
244-3 
46 
CO 
\ 99 
'S 
99 
99 99 
14 
8 
39-10 
110-30 
1057-0 
246-5 
47 
■g 
99 99 
a 
99 99 
15 
8 
39-00 
110'75 
1049-7 
245-6 
48 
[3) 
9 99 
-g 
99 
59 99 ^ 
14 
9 
39-15 
110-75 
1049-7 
245-3 
49 
*S 
'Si 
99 
99 99 
15 
3 
39-20 
110-30 
1057-0 
1 
245*5 
150 
£ 
99 99 
’© 
99 99 
15 
6 
39-40 
111-95 
1030*5, 
J 
240*6 
; ' i 
f51 
o 
1 8 
59 99 
16 
0 
40-40 
110-07 
1081*4' 
252-0 
52 
o 
99 99 
rS 
99 99 
16 
9 
42-75 
112-00 
1087-7 
267*0 
53 
. 
16 
0 
37*15* 
104*79 
1117*8 
264-6 
* Changedconjunc- 
54 
99 99 
,S 
” ” 
16 
0 
37-30 
106-00 
1096-3 
1114*8 
'Mean 4 
1106-4 
251-0 
B 
55 
99 
l 
37-10 
105-09 
1112-6 
250*0 
tor, it being out 
d' 
56 
si 
99 99 
,, 
99 99 
37-20 
104*30 
1125-8 
253*0 
o 
o 
1 
57 
Cs| 
9 99 
59 
99 99 
37-25 
105-15 
1110 9 
250-6 
58 
r-4 
99 
rg 
55 
37-35 
105-10 
1111-8 
252-6 
59 
1 
99 99 
99 95 
37-30 
105-45 
1105-7 
| 
246-6 
L60 
99 99 
s 
37-20 
105-00 
1113-5. 
J 
246-0 
f 61 
1 10 
i 
99 
99 99 
37-45 
101-75 
1172-3' 
314-0 
62 
■< 
99 99 
99 
99 99 
37-35 
100-90 
1188-6 
298-4 
63 
9 99 
99 99 
37-10 
100*75 
1191-4 
277-0 
• 
64 
99 99 
37-35 
101-40 
1178-9 
1187-3 
'Mean < 
1178 0 
287-1 
1—I 
65 
99 99 
9* 
99 99 
37-45 
101-85 
1170-4 
321-6 
3' 
66 
99 99 
rH 
99 
99 99 
37-50 
101-95 
1168-6 
387-61 
+ Doubtful. 
M 
67 
99 99 
95 
99 99 
36-60 
102-35 
1150-7 
— 
68 
69 
;; ;; 
36-65 
36-80 
100-35 
1188-2 
y 13th March 1861. 
170 
» » 
” 
” ” 
36-75 
ioo-io 
1193-0. 
J 
September 14, I860.— Barometer (32°), 29-750. Thermometer, dry j ^Up^^g/’ 
Elastic force of vapour, -270. Humidity, -52. Weight of cubic foot of air, 529-6 grains. To 
ascertain the difference between the initial velocity of high and low gauge 12-pr. shot. 
lbs. 
oz. 
lbs. oz. 
0 
O 
ft. 
ft. 
yds. 
-«- 
1 
1 
8 
3-0S0 
11 
9 
42-70 
106-85 
1193-2 
311 
1 
2 
3 
;; 
” 
Pi 
P 
o 
3*078 
3-079 
” 
” 
42-90 
42-65 
106*95 
107-50 
1191-1 
1180-1 
1193*4 
>Mean < 
320 
331 
Low gauge; bore 
washed. 
4 
li 
3-080 
99 
42-90 
107-75 
1175 2 
1184-1 
336 
| 
5 
9J 
P 
3 080 
H 
99 
42-85 
107*45 
1181-1 
340 
J 
r 6 
G<|— 1 
43 
3-085 
42-90 
— 
.— 
313 
1 
. 
7 
a™ 
3-085 
M 
42-95 
108-24 
1165-4 
1186-5 
'Mean - 
1177-2 
320 
8 
3-085 
43-00 
107-60 
1178-3 
292 
, High gauge; bore 
Hi] 
9 
fS & 
3-085 
£ 
43-00 
107-65 
1177*2 
315 
washed. 
M 
10 
3-083 
99 
© 
42-95 
106-70 
1176-2 
313 
111 
3-*=! 
3-085 
B 
43-10 
107*05 
1189 1 
320 
fl2 
g>© 
3-080 
5j 
99 
43 
43-15 
107-50 
1183-8 
320 
13 
O 00 
» 
•g.-S 
3-079 
99 
o 
43-15 
107-90 
1175-8 
320 
14 
-is 
s ^ 
3-080 
99 
43-05 
107-50 
1183-8 
314 
XLVI 
15 
16 
17 
a 6« 
l| 
» 
» 
B 
| 
3-079 
3-080 
3-080 
” 
43-05 
43-05 
43*05 
107-25 
108*25 
106*30 
1188*8 
1168-9 
1208-1 
.1193-4^ 
Mean “ 
1184-1 
320 
324 
332 
, Lubricatingwads; 
low gauge. 
18 
ft 
3-080 
5} 
99 
43-00 
108-70 
1160-2 
333 
19 
N 
3-079 
” 
42-95 
106-90 
1195-8 
323 
120 
” 
' 
3-080 
” 
42*95 
107*10 
1191*8 
313 
