THE ROYAL ARTILLERY INSTITUTION 
149 
Table XX. 
Number 
of experiment. 
! 
| Nature 
of material. 
JV, number of surfaces. 
U, wt. to 
overcome 
friction 
of 
motion. 
$ ! 
O 
* I 
CD " 
O «« 
o o 
O' 
Xj impact 
of b. 
Jf, motion of the 
piece 
drawn through 
in inches 
per minute. 
A, mean an¬ 
gular fall of b. 
V, velocity 
of b. 
For each, 
expint. 
9 
<a> 
3 
lbs. 
lbs. 
O 
ft. 
1 
496 
per see 
227 2 
2 
471 
488 
*436 
30 
8*79 
20 
3 
496 
1 
965 
228 2 
4 
1000 
988 
00 
CO 
30 
8*79 
20 
3 
1000 
o 
1 
1455 
229 2 
h 2 
6 
1520 
1453 
1*300 
30 
3*79 
30 
3 
J3 
1385 
H 
o 
1 
1927 
230 2 
8 
1927 
1950 
1*741 
45 
5*61 
30 
3 
1997 
1 
2302 
231 2 
10 
2347 
2285 
2*040 
45 
5*61 
30 
3 
J 
2207 
Table XXI. 
1 
*4 
680 
232 2 
2 
645 
662 
•590 
10 
1*277 
3 
660 
fl 
o 
1 
-4 
957 
233 2 
^0 
4 
980 
965 
•861 
io 
1*277 
3 
§ 
957 
£ 
1 
■a 
1368 
234 2 
r § 
6 
1403 
1383 
1*233 
3 
M 
4^ 
1378 
a 
o 
I 
1453 
235 2 
fo 
8 
1533 
1506 
1*345 
7 
*894 
3 
f3 
O 
1533 
£ 
1 
1508 
236 2 
10 
1543 
1550 
1-384 
7 
•894 
3 
1598 
