142 
MINUTES OF PROCEEDINGS OF 
Series b. Table IX. 
EFFECT OF VARYING- THE PRESSURE ON THE SAME EXTENT OF SURFACE. 
8=32 square inches. 
Number 
of experiment. 
Nature 
of material. 
P, amount of pressure. 
<D 
£ 
& 
® II 
Pk II 
® rd 
1 .a ■ 
m 
O 
& 
£ 1 
U, wt. to 
overcome 
friction 
of 
motion. 
C, eoeffi. of friction 
B 
of motion = p 
I j impact 
of b. 
M, motion of the 
piece 
drawn through 
in inches 
per minute. 
A, mean an¬ 
gular fall of b. 
V, velocity 
of b. 
lor each 
expmt. 
Mean. 
tons 
lbs. 
lbs. 
lbs. 
O 
ft. 
1 ' 
371 
per sec 
145 2 
0-50 
35 
383 
375 
•334 
30 
3-79 
15 
3 
371 
1 
655 
146 2 
0-75 
52-5 
655 
660 
•333 
30 
3-79 
15 
3 
670 
1 
992 
147 2 
1-00 
70 
860 
904 
•403 
30 
3-79 
18 
3 
860 
1 
« 
o 
1090 
148 2 
1-25 
87-5 
1030 
1052 
•375 
30 
3-79 
24 
3 
fcJO 
3 
1035 
1 
o 
1130 
149 2 
l 1 
1-50 
105 
1160 
1123 
•334 
30 
3-79 
18 
3 
g 
1080 
1 
§ 
1245 
150 2 
175 
122-5 
1245 
1263 
•322 
30 
3-79 
12 
3 
M 
1300 
1 
a 
O 
1415 
151 2 
2-00 
140 
1415 
1432 
•320 
30 
3-79 
12 
3 
1465 
1 
1510 
1 
152 2 
2-25 
157-5 
1553 
1528 
•303 
30 
3-79 
10 
3 
1520 
i 
1 
1710 
i 
153 2 
2-50 
175 
1715 1712 
•305 
30 
3-79 
15 
3 
1710 
Table X. 
1 
473 
154 2 
0*50 
35 
500 469 
• -418 
20 
2-64 
8 
3 
435; 
1 
685 j 
155 2 
g 
075 
62-5 
720 : 679 
i -403 
20 
2-54 
7*5 
3 
630 
1 
i? 
900 
150 2 
tUQ 
f3 
1-00 
70 
1015 
ii 962 
1 *425 
30 
3-79 
3 
o 
H 
970 
1 
£ 
1500, 
157 2 
’to 
1-25 
87-5 
1535 1495 
i *533 
30 
3-79 
3 
3 
1450| 
1 
fH 
1945) 
158 2 
1-50 
105 
1980 1926 
I -573 
30 
3-79 
3 
g 
I860 
>j 
1 
c3 
2236 
159 2 
175 
122-5 
2227 2226 
1 -568 
30 
3-79 
3 
PI 
o 
2215 j 
1 
.u 
2425! 
100 2 
_EJ 
2-00 
140 
2460 2448 
1 *546 
45 
6-61 
3 
feJO 
p 
2460 
1 
o 
S_| 
2735| 
101 2 
£ 
2-25 
157'5 
2770 274C 
> -543 
45 
6-61 
3 
2715; 
1 
3015| 
102 2 
I 
2-50 
175 
3015 3018 
1 *538 
45 
5-61 
3 
J 
3025! 
