162 
MR. RENNIE’S EXPERIMENTS ON THE FRICTION AND 
Experiments on the Friction of Axles without and with Unguents. 
Weight on Axle. 
Weight required to move it. 
Time. 
Proportion. 
Space passed over. 
Yellow Brass on 
Cast Iron. 
cwt. 
lbs. oz. 
x 
1 8 
37.33 
1 
3 8 
32.00 
2 
7 0 
32.00 
3 
16 8 
sec. 
90 
20.36 
4 \ inches. 
4 
24 8 
18.28 
5 
29 4 
19-14 
10 
193 8 
5.78 
11 
200 12 
6.13 
Cast Iron on Cast Iron. 
CWt. 
lbs. oz. 
sec. 
90 
10 
11 
131 1 
140 0 
8.54 
8.80 
4| inches. 
Cast Iron on Cast Iron with Hogslard. 
cwt. 
lbs. oz. 
sec. 
10 
117 4 
90 
9.55 
4| inches. 
Yellow Brass on 
Cast Iron. 
cwt. 
lbs. oz. 
x 
1 10 
34.46 
1 
3 1 
36.57 
2 
3 
7 8 
23 0 
sec. 
90 
29.86 
14.60 
4| inches. 
4 
43 0 
10.41 
5 
47 8 
11.78 
10 
120 8 
9-29 
Gun Metal on Cast Iron with Hogslard. 
cwt. 
lbs. oz. 
sec. 
10 
130 4 
90 
8.59 
4 \ inches. 
Yellow Brass on Cast Iron with Anti-Attrition Composition. 
cwt 
lbs. oz. 
—7 
1 
7 8 
14.93 
2 
9 0 
24.88 
3 
10 8 
sec. 
90 
32.00 
4 
5 
12 8 
14 8 
35.84 
38.62 
4 \ inches. 
After remaining 41 hrs. 1 . « 
in a state of rest with 1 1 u 
it took 190 0 
5.89 
Fresh composition being ) \ ( 
applied / ^ 
it took only 23 8 
again 20 0 
47-65 
56.00 
