138 
MINUTES OF PROCEEDINGS OF 
September 11, I860.—Barometer (32°), 30 • 370. Thermometer, dry j 5 ^ 49 °’. q } W Uprange. 
Elastic force of vapour, *239. Humidity, *48. Weight of cubic foot of air, 541*56 grains. To 
ascertain the initial velocity of the Armstrong 12 -pr. shell in function of the weight of the charge.— 
continued. 
■3 
1 
O 
Projectile. 
Re- 
Reading of 
Needle. 
Velocity. 
P4 
- Range. 
Remarks. 
o5 
0 
& 
£g 
& * 
M 
0 
Nature. 
Dia¬ 
meter. 
Weight 
coil. 
Dis- 
junctor. 
Pro¬ 
jectile. 
At 
30 yds. 
Initial. 
lbs. oz. 
3*085 
lbs. oz. 
0 
0 
ft. 1 
ft. 
yds. 
(2 1 
1 8 
11 9 
.— 
42*80 
107"25 
1184-2 
( 
' 324 
Gun laid horizon¬ 
22 
O? 
3 085 
— 
42'95 
107-40 
1181*2 
I 
312 
tal by spirit level 
23 
95 99 
3 ■ 0S4 
— 
42*90 
107-75 
1174-3 
j 
320 
and chamber 
> 
24 
25 
05 
;; ;; 
O 
3‘0S3 
3*083 
” ” 
42-75 
42-70 
107*35 
108-80 
1182-1 
1193-2 
1190-2 j 
l-Mean < 
1180-9 
310 
332 
sponged out with 
a wet sponge 
0 * 
26 
& 
99 99 
"S 
3*084 
99 9* 
— 
42-80 
108-85 
1192-2 
334 
after everyround. 
M 
27 
CM 
99 99 
3-085 
9 99 
— ; v E 
42-90 
107*50 
1179-2' 
310 
Gun mounted on 
28 
99 99 
O 
3* OSS 
— 
42-75 
— 
— I 
359 
travelling car¬ 
riage. Height of 
29 
£ 
99 9» 
3-084 
— 
42-90 
107-95 
1170-4' 
303 
130 
O 
99 *9 
r^J 
3'084 
9 99 
— 
42-90 
107-90 
1171*4 j 
304 
axis. 
rsi 
00 
1 10 
•fH 
3-084 
5 / 
— 
42-85 
105-65 
1216*6 
r 
' 348 
32 
s 
9 
3-085 
1 — 
42-75 
105*75 
1214-6 
332 
33 
3*085 
_ 
42-95 
105-00 
1230-3 
310 
(>' 
34 
99 99 
c3 
3*083 
w „ 
— 
42*90 
105-35 
1223-0 
1234-6 
• Mean 
1224-8 
359 
Mj 
35 
99 99 
O 
3-034 
99 99 
— 
42-95 
105-45 
1220-8 
340 
Ml 
36 
CM 
99 99 
3*083 
59 99 
— 
42-85 
108*05 
1208-4 
348 
M 
37 
<M 
'o 
3*031 
— 
42*80 
105'05 
1229-2 
352 
38 
£ 
rg 
3*088 
—. 
43'05 
105-00 
1238-7 
355 
39 
3-0S5 
•— 
43-05 
105-15 
1233-5 
332 
140 
1 12 
O 
3*084 
9 99 
— 
43*15 
105*10 
1234*5 
335 
f41 
<M 
a 
3-084 
99 
— 
43*25 
104-40 
1249-9 
355 
42 
rH 
0 
3-084 
— 
43-25 
104-55 
1246*7 
360 
A 
43 
6C 
9 99 
3-085 
99 
— 
— 
104-40 
1249-9; 
336 
I 
i-3 
44 
O 
9 99 
a. 
3-083 
99 9 
.— 
43*10 
104-15 
1255*5! 
1272-2 
Mean <{ 
1262-0 I 
336 
ii 
b j 
45 
99 99 
(M 
3*083 
99 99 
— 
43*25 
103-35 
1273*0 
339 
I 
HI 
46 
§ 
99 99 
i -1 
3-085 
99 99 
— 
43*25 
102-95 
1282*0 
388 
M 
47 
99 
3-085 
99 99 
— 
43*30 
102-95 
1282-0; 
344 
I 
48 
99 99 
3-085 
99 99 
— 
43-35 
104*15 
1255-5 
1 
345 
49 
99 99 
3-085 
99 99 
— 
43-40 
104-20 
1254'l! 
l 
354 
150 
” ” 
3*085 
” ” 
~ 
43*30 
103-40 
1271-9 
f 
325 
March 12 , 1861.—Barometer (32°), 29*520. Thermometer, dry, 45 o, 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.— 2 nd series. 
lbs. oz. 
lbs. oz. 
0 
0 
ft. 
ft. 
yds. 
r 1 
0 14 
3-084 
11 9 
5 10 
33-45 
— 
— 
' 203-9 
Lubricating wads 
2 
» 
» » 
6 
0 
33*45 
123-45 
808-1 
231-1 
made up in the 
3 
rO 
,=! 
> „ 
6 
0 
33-40 
123*15 
809-4 
204-5 
cartridge were : 
3 
4 
l 
6 
6 
33-40 
123-45 
808-1 
205-0 
used throughout 
!> 
5 
rH 
6 
6 
33 45 
123-30 
807*7 
809*2 
204*4 
this experiment. 
M 
6 
m 
& 
6 
6 
33*35 
123-85 
801*6 
• Mean * 
203-1 
It was found, 
M 
7 
O 4 
© 
7 
2 
33-50 
124*05 
799-4 
803-8 
however, that 
M 
8 
CQ 
6 
5 
33-35 
— 11 
183*0 
with the low 
9 
43 
a 
” ” 
7 
1 
33-30 
124-30 
796-6 
200*8 
charges the wad 
lio 
O 
7 
0 
33*05 
— 
248-7 
did not break up. 
rii 
OO 
1 0 
S 
’ 
” 
8 
0 
— v 
.— 
_ 232-5 
and it was neces¬ 
12 
•’<3 
8 
1 
32-90 
120-25* 
835-8 : 
' 188-3 
sary to sponge 
13 
1 
„ 
£ . 
S) 
8 
7 
32-80 
118*45 
856-6 
163*0 
the gun. This 
14 
2"o 
9 
1 
32-70 
118-30 
858*4 
163-0 
practice was con¬ 
15 
% 
5-g 
9 
3 
32-75 
118-30 
858-4 
870*0 
163-3 
tinued through¬ 
16 
0 
» » 
” 
” ” 
9 
4 
32*75 
120-35* 
835- 
• Mean - 
166-5 
out the experi¬ 
17 
10 
0 
S O 
> 
10 
5 
32*80 
117-10 
872-6 
863*9 
170-3 
ment. Gun 
M 
18 
rH 
’ ” 
10 
6 
32*75 
117-05 
873-2 
171- 
mounted on tra¬ 
19 
£ 
fg 
» > 
11 
8 
32-70 
117-40 
869-0 
171-1 
velling carriage, 
120 
! 
r© 
11 
0 
32*75 
118-25 
859-0. 
J 
100-3 
height of axis 
r2l 
£ 
1 2 
11 
6 
38*25 
117'25 
940-2' 
i 
- 203-3 
4 feet 3 inches, 
22 
a 
13 
3 
38*40 
119-00 
916-2 
181-3 
slope of plat¬ 
23 
rH 
a 
12 
6 
38-40 
123-15* 
861-9 
247*0 
form 1°. The ; 
M 
24 
60 
bo 
11 
9 
38-35 
119-75 
906*1 
181-5 
platform was wet j 
Hi 
25 
§ 
OT 
11 
6 
40-00 
120*85* 
909-6 
203-3 
and slippery, and 
M i 
26 
jj 
11 
9 
39-80 
— 
— 
Q9/I 
202-3 
there were occa¬ 
H j 
27 
a 
ft. 
11 
6 
39-75 
119-05 
934-6 
0 
237-3 
sional heavy 
28 
s 
” 
9 
6 
39-75 
118-75 
938-8 
201-0 
showers of rain 
29 
< 
9 
6 
39-90 
120*90 
909-0 
197*5 
throughout the 
L30 
” ” 
9 
6 
40-00 
119-55 
927-6. 
199*1 
day. Powder, 
A 4. W. A. 5/9/60. 
Lot 288. 
* Shell stripped. 
