TKACT 36.
THE WHIRLING-MACHINE.
199
By comparing the experiments of this day, with those ofthe day before, it appears that the differences are very smallindeed ; but those of this day are rather longer intervals, ifany thing ; but the difference is so small, and doubtful, thatthe times may be accounted equal.
49. After the above experiments, the following coursewas then instituted with a thin bit of lead, on the end ol thearm, equal to the weight of the brass plane, and which, itsresistance being very small, will give nearty the weights tobe deducted from all the above, on account of the frictionof the machine and the resistance on the arm, viz, with the
actuating wts. in oz.
o
00
12
16
20
24 i 26 i 32
time of each revolut.
3-33"i2-50
J-00
1-54
1-35
4-20' 1-0.911-00
And from these, by interpolation are deduced the following.
Imcl.
0
5°
10°
o
o
30°
o
o
■tf*
50°
60°
70°
80°
90°
Wts.
oz.32
24-8
19-5
15-5
12-7
10-9
9'9
9-3
8-9
8-7
8-6
Times
1-00'
1 • 17"
1-3.5"
1-68"
1-99"
2-28"
2-56"
2-79'
2-94'
3-00"
3-02"
50. And hence the following general table.
Inclin.
Time of
Actuating wt.
Diff. or
Ditto re-
Velocity
of theplane.
one revo-lution.
with
plane
without
plane
resist-
ance'.
duced tov arm.
per
second.
0°
roo"
oz
32
oz
32*0
oz
00
oz
*000
t“Ct
28-1
5
1-17
32
24-8
7-2
•140
24-1
10
1-35
32
19-5
12-5
•243
20-8
20
1-68
32
1 5*5
16-5
•320
16-8
30
1-99
32
12-7
19-3
•371
141
40
2-28
32
10 9
2 rl
•410
12 4
45
2*42
32
10-4
21-6
•420
11-6
50
2'56
32
9-9
22-1
•429
1 l 0
60
9'1'J
32
93
22‘7
■441
10'l
70
2-94
32
3-9
23-1
■448
9-6
80
3-00
32
• 3-7
23-3
•452
9-4
90
3'02
32
8*6
23-4
•454
9-3
1
2
3
4
5
6
7