18 S
EXPERIMENTS WITH
TRACT 36?.
Table of Regular Mean Resistances to several Figures.
Veloc.
per
sec.
Small
Hcinis.
flat
Cone.
Whole
Globe
Cylin-
der
Large
Hemis.
Ratioof flatto
round
Vertex
Base
convex
flat side
3
1-4
1 '5
3-3
1-4
2-4
i-i
2-6
2-36
4
2-4
2-5
5-6
2-4
4-6
2-1
4-9
2-33
5
3-6
3-6
8-3
3-5
7-3
32
7-6
2-38
6
' 5-2
5-0
11-5
4-8
10-5
4-7
10-8
2-30
7
7-1
G-6
15'2
6-4
14-2
63
14-5
2-30
8
9‘2
8-6
19-5
8-3
18-4
8-2
18-8
2-30
9
11-7
10-8
24-4
10-5
23-3
10-2
23-7
2-32-
10
14-4
13*3
30-0
13-0
28-9
12-4
29-3
2-36
11
17-5
16-1
36-4
45-8
35-2
14-9
35-7
2-40
12
21-0
19-2
43-4
18-9
42-2
17-7
42-7
2-41
13
24-7
22-5
51-1
22-2
50-0
20-9
50-5
2-42
14
28-8
26-2
59-6
25-8
58-5
24-4
59-0
2-42
15
33-2
30'1
68-8
29-7
67-8
28-2
68-3
2-42
ie
37*9
34'4
79-0
33-9
73*0
32-4
78-6
2-43
17
42-9
38-9
90-1
38-4
89-2
36-9
89-8
2-43
18
48-2
43-8
I02'3
43-3
101-5
41-8
102-1
2-44
19
53-9
49-0
115‘5
48-5
114-8
47-1
115-4
2-45
20 1
60'1
54-6
1298
54'0
129-2
52-8 |
129-8
2-46
Here, besides the columns of experimented resistances, inavoirdupois ounces and tenths, for each figure; another co-lumn is added at the end, showing the ratios between thecorrespondent numbers in the two next preceding columns,being the resistances for the round and flat sides of the largehemisphere ; which ratios are found by dividing always thegreater numbers by the less; showing that they proceed al-waj's increasing a very little, as the velocity is increased ;the medium among all these being 2 - 4, instead of 2 only, asexpected by the theory of resistances to such figures. Butas part of this ratio may be owing to the different shape ofthe after or hinder sides of the figures, the more correctcomparison woul^l be between either the whole sphere and theflat side of the large hemisphere, or the cylinder and theround side of the same large hemisphere, in both of whichcases the after parts would be of the same shape, and then