136 
MINUTES OF PROCEEDINGS OF 
Aug. 28, 1860.—Preliminary Experiments to ascertain the Working of the Instrument. 
No. of Rounds. 
Nature of Ord¬ 
nance. 
Charge. 
Projectile. 
Re¬ 
coil. 
Reading of 
Needle. 
Velocity. 
Range. 
Remarks. 
Nature. 
Dia¬ 
meter. 
Weight. 
Dis- 
junctor. 
Pro¬ 
jectile. 
At 
30 yds. 
Initial. 
lbs e oz. 
lbs. oz. 
0 
o 
ft. 
ft. 
yds. 
r l 
1 8 
3*084 
10 14i 
42*75 
— 
1188*9 
Gun had during 
2 
„ ,, 
99 99 
42*80 
105*85 
1189*1 
the first 7 rounds 
3 
99 99 
42*55 
105*80 
1189*1 
a slight depres¬ 
4 
99 99 
42*50 
105-80 
1201*1 
sion, laid by 
6 
eq ja 
,, „ 
■e 
99 99 
42*65 
105*20 
1181*2 
spirit level the 
6 
99 99 
§ 
99 
42*65 
106*20 
1187*1 
rest of the day. 
7 
6 8 
99 99 
*S 
42*70 
105*90 
1203*1 
Chamber washed 
8 
X o5 
99 99 
& 
99 99 
'd 
42*79 
105*05 
1188*1 
out after every 
9 
^ o* 
99 99 
pf'd 
99 
> 
42*60 
105*80 
— 
round. 
> 
10 
P. Ol 
99 99 
|| 
9 
£ 
42-60 
_ 
1197*4 
11 
99 99 
o 
42*55 
— 
— 
-Mean 
X 
12 
'T | 
99 99 
99 99 
o 
42*55 
106*30 
1178*3 
1187*5 
13 
a oo 
99 99 
a> 
99 
99 99 
O 
42*56 
106*60 
1192*0 
14 
2 43 
| 
99 99 
6 
42*55 
106*31) 
1178-3 
15 
*oa 
42*55 
106*45 
1175-4 
16 
s 
99 99 
99 
99 99 
42*55 
105*75 
1189*1 
17 
<1 
99 99 
& 
99 99 
42*65 
106-40 
1176*3 
18 
99 99 
y9 
99 99 
42-60 
105*80 
1188*1 
19 
99 99 
99 99 
42-75 
105*65 
1190*6 
20 
99 99 
99 99 
42*60 
105*65 
1190*6 
L21 
99 99 
» 
99 99 
42-70 
105*80 
1188*1 
September 1, 1860.—Barometer (32°), 30*060. Thermometer, dry, 64°*5 *, wet, 59°*0. Wind 
light. Elastic force of vapour, *427. Humidity, *70. Weight of cubic foot ot air, 529*6 grs. 
To ascertain the initial velocity in function of the weight of the shot. 
lbs. 
OZ. 
lbs. 
oz. 
O 
0 
ft. 
ft. 
yds. 
r i 
1 
8 
3*083 
11 13 
42-90 
— 
— 
Gun laid perfectly 
2 
99 
99 
3*083 
99 
9y 
42*90 
107*75 
1179*2 
324 
horizontal every 
3 
99 
3*083 
99 
J5 
42-90 
107*20 
1186*12 
329 
round. 
4 
99 
99 
3 083 
99 
99 
42*95 
106 60 
1198*2 
335 
* Shell stripped. 
5 
99 
3*082 
99 
42-95 
107-65 
1177*2 
1190*6 
315 
t Doubtful. 
X 
: e 
99 
99 
3*083 
99 
99 
42*90 
107*15 
1187*1 
-Mean - 
327 
After this experi¬ 
X 
l 7 
99 
3*083 
99 
99 
42*95 
108*25 
1165*5 
1181 5 
327 
ment was com¬ 
l 8; 
99 
3*085 
99 
99 
42*80 
107*40 
1182*2 
311 
pleted, it was 
1 9 
| | 
R 
3-083 
9y 
42*90 
106 95 
1191*2 
322 
found that two 
1 io 
99 
'bC 
3-083 
99 
99 
V 
42*85 
107-70 
1176*2 
301 
kinds of powder 
m 
6 S 
99 
99 
*S 
3-083 
99 
9 
42*85 
107*90 
1172*3 
. 300 
had been sup¬ 
ri 2 
X m 
99 
*■§ 
3*082 
11 
9 
-d 
42*85 
106*95 
1189*6 
' 321 
plied ; and this 
13 
if 
99 
3*083 
9y 
99 
£ 
05 
42-85 
106*60 
1195-4 
1204*8 
326 
fact accounts for 
X ^ 
14 
p, eq 
99 
9> 
1^ 
3-083 
y9 
99 
42*80 
106*10 
1206*8 
-Mean •{ 
330 
the discrepancies 
X 
15 
cq ^ 
99 
99 
3*084 
y9 
rO 
42-85 
106*75 
1193*6 
1195*4 | 
326 
which may be 
L16 
* | 
99 
pi> 
3-085 
99 
o 
42-75 
106*85 
1191*6 
l 
. 321 
observed in this 
H7 
S 00 
99 
99 
3*083 
11 
5 
o 
42-85 
106*40 
1200*6 
f 
series. 
1 18 
o 
99 
99 
3*089 
9 
55 
X 
42*85 
*119*70 
1180*6 
1200*4 ! 
-Mean ■{ 
1190-8 j 
t Pired too soon. 
1 19 
w & 
99 
3*084 
y9 
55 
42*75 
107*40 
1181*6 
296f 
§ Signal mistaken. 
X 
! 20 
S .SP 
u o 
99 
3 083 
99 
99 
42*85 
107-35 
1207*8 
323 
1 21 
< £ V 
99 
99 
a 
3*083 
99 
55 
42*80 
106*05 
1183-6 
311 
122 
9y 
9y 
sq 
3-084 
55 
42*95 
107*25 
.— 
l 
323 
r 23 
99 
3*082 
11 
1 
t — 
— 
— 
r 
Hi 
24 
99 
„ 
3*085 
9J 
42*75 
104-90 
1230*5 
| 
352 
25 
99 
3*083 
99 
99 
42*85 
106-60 
1196*6 
1215*6 | 
325 
>A 
26 
99 
3-085 
99 
42*80 
106*40 
1200*6 
-Mean -{ 
307 
X 
27 
3*083 
99 
42*80 
§ - 
— 
1205*6 | 
316 
X 
28 
99 
99 
3*083 
99 
99 
42*75 
106*20 
1204*7 
1 
317 
1.29 
” 
" 
3-083 
" 
" 
42*85 
106*65 
1195*4 
. 311 
