138 
MINUTES OP PROCEEDINGS OP 
TWO SUEEACES. 
Table Y. — -CoutiuuQd, theough w.i. 
Number 
of experiment. 
Nature 
of material. 
S, amount of surface. 
P, pressure per square 
P 
inch =~g 
R, wt. to 
overcome 
friction 
of 
motion. 
C coeffi. of friction 
22 
ox motion • — p 
I, impact 
of b. 
M, motion of the 
piece drawn through 
in inches per minute. 
Remarks. 
A, mean an¬ 
gular fall of b. 
F, velocity 
of b. 
For each 
expmt. 
Mean. 
in. 
lbs. 
lbs. 
lbs. 
Q 
ft. 
1 
936 
per sec 
117 2 
M 
64 
35 
926 
936 
•418 
30 
3-79 
0-37 
Regular. 
3 
£ 
946 
1 
844 
118 2 
too 
32 
70 
834 
839 
•375 
30 
3-79 
0-25 
Regular. 
3 
o 
839 
1 
819 
119 2 
16 
140 
809 
809 
•361 
30 
3-79 
0-25 
Regular. 
3 
% 
799 
1 
H 
895 
120 2 
§ 
4 
560 
895 
916 
•408 
0 
0 
0-44 
Motion very regular. 
3 
0 
923 
4 
J 
951 
Table YI. 
TWO SUEEACES. 
THEOUGH GUN-METAL. 
1 
659 
121 2 
3 
64 
35 
645 
646 
•288 
0 
0 
0-8 
Regular. 
3 
1 
635 
1 
3 
655 
122 2 
d 
> tL 
32 
70 
635 
618 
•276 
0 
0 
1-13 
Regular. 
3 
565 
1 
o 
ti 
590 
123 2 
■+3 
16 
140 
570 
573 
•256 
0 
0 
0-8 
Regular. 
3 
■a 
560 
124 1 
o 
4 
560 
2688 
... 
... 
... 
... 
Surfaces of oak scraped to depth 
of -03". 
1 
590 
125 2 
r d 
64 
35 
600 
600 
•268 
0 
0 
0-37 
Regular. 
3 
1 
610 
1 
d 
520 
126 2 
d 
l fan 
32 
70 
510 
615 
•230 
0 
0 
0-8 
Regular. 
3 
515 
i 
8 
417 
127 2 
£ 
16 
140 
407 
409 
•182 
0 
0 
0-63 
Regular. 
3 
3 
402 
128 1 
m 
4 
560 
2898 
... 
Surfaces of elm scraped to depth 
of -05"., 
1 
*> 
486 
129 2 
is 
-u 
64 
35 
486 
486 
•217 
0 
0 
0-37 
Regular. 
3 
I 
486 
1 
467 
130 2 
|o 
32 
70 
452 
454 
•203 
0 
0 
0-7 
Regular. 
3 
442 
1 
r tc 
3 
540 
131 2 
p 
16 
140 
530 
537 
•239 
0 
0 
0-37 
Regular. 
3 
J5 
•+3 
540 
1 
132 2 
3 
4 
560 
884 
a>7>7 
780 
•348 
30 
3-79 
4 
In 3rd trial, teak scraped to 
3 
rH 
o/ / 
depth of •08". 
