ABRASION OF THE SURFACES OF SOLIDS 
161 
Table IX. 
Experiments on the Friction of Axles without and with Unguents. 
Weight on Axle. 
Weight required to move it. 
Time. 
Proportion. 
Space passed over. 
Gun Metal 
on 
Cast Iron. 
cwt. 
lbs. 
OZ. 
sec. 
1 
16 
0 
90 
7-00 
2 
30 
0 
55 
7.46 
3 
44 
0 
55 
7.63 
4 
60 
12 
55 
7-37 
5 
112 
0 
80 
5.00 
4^ inches. 
6 
134 
0 
90 
5.01 
7 
After remaining 12 hrs. \ r a 
it took to move it j iQ*x 
0 
55 
5.09 
8 
175 
0 
55 
5.12 
9 
200 
0 
55 
5.04 
10 
238 
0 
55 
4.70 
Yellow Brass 
on 
Cast Iron. 
cwt. 
lbs. oz. 
sec. 
10 
272 0 
90 
4.11 
\\ inches. 
Cast Iron on Cast Iron. 
CWt. 
lbs. oz. 
10 
11 
173 8 
228 0 
sec. 
90 
6.45 
5.40 
4§ inches. 
Cast Iron on Cast Iron with Black-lead. 
CWt. 
lbs. oz. 
sec. 
11 
161 0 
90 
7.65 
4| inches. 
Gun Metal on Cast Iron with Black-lead. 
cwt. 
lbs. oz. 
sec. 
11 
170 0 
90 
7-24 
4§ inches. 
Yellow Brass on Cast Iron with Black-lead. 
cwt. 
lbs. oz. 
sec. 
1 
14 12 
7.59 
2 
31 4 
7.16 
3 
47 8 
90 
7-07 
4| inches. 
4 
65 8 
6.83 
5 
84 0 
6.66 
11 
181 0 
6.80 
- 
Gun Metal on Cast Iron with Oil. 
CWt. 
lbs. oz. 
sec. 
11 
218 8 
90 
5.63 
4£ inches. 
MDCCCXXIX. 
Y 
