146 
MINUTES OF PK0CEED1NGS OF 
Table XYI. — Continued . 
Number 
of experiment. 
Nature 
of material. 
P, amount of pressure. 
p , pressure per square 
1 p 
inch 
R, wt. to 
overcome 
friction 
of 
motion. 
C, coeffi. of friction 
R 
of motion = p 
J, impact 
of b. 
| A, mean an¬ 
gular fall of b. 
V, velocity 
of 6. 
For each 
expmt. 
Mean. 
tons 
lbs. 
lbs. 
lbs. 
o 
ft. 
1 
987 
per sec 
2 
885 
3 
1022 
210 4 
L00 
70-0 
905 
954 
•426 
25 
5 
885 
6 
1042 
1 
1056 
2 
1160 
3 
1225 
4 
1091 
5 
114b 
211 6 
1*25 
87*5 
1180 
1186 
•423 
30 
3-79 
7 
1250 
8 
1195 
9 
1215 
10 
1230 
11 
1299 
1 
1542 
2 
1507 
3 
a 
o 
1368 
212 4 
u 
1-50 
105 
1368 
1272 
•379 
30 
3-79 
5 
r d 
952 
6 
§ 
1041 
7 
to 
1125 
1 
,£* 
1368 
2 
tc 
H 
1403 
3 
2 
1091 
213 4 
Jj 
1-75 
122*5 
1125 
1251 
•319 
30 
3-79 
5 
f el 
1265 
6 
1299 
7 
43 
1195 
8 
rt 
1265 
1 
o 
1403 
2 
T< 
1611 
3 
1265 
4 
p 
1334 
5 
1403 
214 6 
2-00 
140 
1472 
1444 
•322 
30 
3-79 
7 
1368 
8 
1472 
9 
1502 
10 
1611 
1 
1923 
2 
1507 
3 
1577 
215 4 
2*25 
167-5 
1715 
1621 
•321 
30 
3-79 
5 
1507 
6 
1577 
7 
1542 
1 
1992 
2 
1785 
3 
1577 
4 
1507 
210 5 
2-50 
175 
1715 
1674 
•299 
30 
3-79 
6 
1785 
7 
1507 
8 
J 
1527 
M , motion of the 
piece 
drawn through 
in inches 
per minute. 
Limits of 
variation 
10 and 1*5. 
Mean 5-1. 
Limits of 
variation, 
8" and 0" 
Mean 2-6. 
Limits of 
variation, 
20 and 1. 
Mean 5. 
Limits of 
vai iation, 
10 and 0. 
Mean 3-2. 
Limits of 
variation, 
20 and 0. 
Mean 2-6. 
Limits of 
variation, 
12 and 0. 
Mean 2*7. 
Limits of 
variation, 
12 and 7. 
Mean 2. 
