THE ROYAL ARTILLERY INSTITUTION. 
137 
September 3, 1860.—Barometer (32°), 30-210. Thermometer (dry), 62°-4; (wet) 54°*8. Wind 
light. Elastic force of vapour, -331. Humidity, -59. Weight of cubic foot of air, 558*1 grs. 
To ascertain the initial velocity as a function of the weight of the shot. 
1 ' 
\ 
i 
Nature of Ord¬ 
nance. 
Charge. 
Projectile. 
Re¬ 
coil. 
Reading of 
Needle. 
Velocity. 
Range. 
Remarks. 
o 
d 
£ 
Nature. 
Dia¬ 
meter. 
§ 
1 
Dis- 
junctor. 
Pro¬ 
jectile. 
At 
30 yds. 
Initial. 
lbs. oz. 
lbs. oz. 
o 
O 
ft. 
ft. 
yds. 
r i 
1 8 
3*085 
11 13 
42-80 
107*30 
1182*9 
— 
Gun laid P.B. by 
2 
3*085 
42*80 
108*20 
1169*3 
— 
spirit level every 
3 
3*083 
42-75 
108*15 
1166*3 
310 
round. Chamber 
4 
3*085 
” 33 
42*80 
108*25 
1164*3 
324 
washed out after 
M 
5 
” ” 
3*083 
42-90 
108*45 
1160*4 
1173*4 
313 
every round. 
G 
3*084 
42*90 
108*05 
1168*2 
-Mean \ 
323 
* Shell stripped. 
7 
3*085 
42-75 
108*75 
1154-7 
1164*5 
323 
M 
8 
3*033 
42*85 
108*25 
1164*3 
316 
9 
3*083 
42*95 
108*10 
1167*2 
324 
10 
"o 
3*084 
42*90 
108*35 
1162-3 
314 
J1 
. ^ | 
3*085 
’ 5 
— 
107*85 
1172*1 
324 
fl2 
- « OS 
to 
3*084 
11 5 
43*05 
107*10 
1189*6 
r 
324 
13 
6 r *< 
p . 
3*085 
43*00 
107*55 
1180*6 
310 
14 
JZ5 g 
g-g 
3*085 
g 
42*90 
106*65 
1198*6 
315 
15 
r o' 
'S'm 
3*083 
C 
43*00 
106*40 
1202*5 
300 
16 
* *: 
»> >> 
-g* 
3*084 
42-95 
106'05 
1210*8 
1202*5 
320 
■< 
17 
s t 
” ” 
■g § 
3*083 
42*95 
106*70 
1197*6 
-Mean < 
336 
Vi 
18 
3*085 
42-95 
*107*55 
1180*6 
1192*9 
301 
19 
£ OO 
o •» 
3-084 
33 
43*00 
106*05 
1210*8 
370 
20 
+3 s 
3*084 
33 33 
— 
107*20 
1187*5 
314 
21 
§ 
3*085 
— 
107*60 
1179*6 
300 
\ 1 
122 
S | 
a 
3*085 
— 
107*40 
1183*5 
- 
i 
300 
r 23 
c ? 
cq 
3*085 
l 33 
42*90 
105*90 
1212*8 
r 
292 
24 
rH 
3*083 
33 
43-00 
105*80 
1214-8 
— 
25 
3*083 
42-95 
106*40 
1202*5 
288 
• 
26 
3*084 
42*95 
106 75 
1195*4 
1220*1 
293 
Vi 
27 
3*083 
33 33 
42*90 
106*50 
1200*4 
i 
319 
Ml 
28 
3*084 
33 33 
42*85 
105*85 
1213-8 
1209*8 
i 
320 
M 
29 
3*083 
33 33 
42*85 
106*00 
1210*7 
319 
30 
3*083 
33 33 
42*80 
105*85 
1213*8 
— 
31 
3*083 
43*00 
105*40 
1223*2 
314 
.32 
” » 
3*084 
” ” 
42*95 
106*00 
1210*7 
i 
292 
September 5, 1860.—Barometer (32°) 30*335. Thermometer (dry) 61°-5; wet, 57°-4. Elastic 
force of vapour, -420. Humidity, -77. Weight of cubic foot of air, 537*6 grs. To ascertain 
the initial velocity of an Armstrong shell in function of the weight of the charge. 
- i 
lbs. oz. 
1 4 
3*084 
lbs. oz. 
11 9 
42*60 
112*70 
ft. 
1080*2 
ft. 
1 
yds. 
' 276*0 
Gun laid P.B. every 
2 
3*085 
42*55 
113*40 
1068*1 
277*0 
round. Chamber 
3 
” ” 
3*085 
” M 
42*60 
112*90 
1076*7 
277*0 
washed out after 
4 
» » 
3*085 
42*75 
113*70 
1063*0 
1063*1 
^-Mean < 
1055*3 
276*0 
every round. 
5 
|j j§ 
” ” 
3*084 
42*75 
114*55 
1048*6 
264*0 
6 
t 6D 
3*083 
42*75 
114*00 
1058*0 
265*0 
7 
© 2 
*CD . 
3*083 
* 
42*75 
115*50 
1033*0 
256*0 
8 
l*H ^ 
^ O 
3*085 
42*75 
114*35 
1052*0 
264*0 
9 
£ & 
3*083 
t 
42*65 
114*20 
1054*6 
264*0 
Uo 
I'S 
3*085 
a> 
42-85 
116*35 
1019*0 
. 256*0 
ril 
a .< 
&D O 
1 6 
4= 3 
3*085 
1 
42*75 
110*65 
1118*4 
' 296*0 
12 
S' 0 
11 
3*085 
42*85 
112*50 
1085*4 
265*0 
13 
O ™ 
3*085 
42*80 
113*40 
1069*9 
265*0 
14 
11 
4jg 
3*084 
42*80 
111*25 
1107*5 
1100*7 
305*0 
15 
3*085 
\ 33 
42*75 
112*85 
1079*2 
279-0 
16 
17 
” « 
a 
3*085 
3*084 
» ” 
42*85 
42*80 
113*40 
110*65 
1069-9 
1118*4 
1092*4 
270*0 
296*0 
18 
rH 
3*085 
42*85 
110*50 
1121*2 
280*0 
19 
3*085 
43*25 
113*40 
1077*2 
249*0 
120 
” ” 
3-084 
3 , 3 , 
43*20 
113*40 
1077*2 
. 298*0 
