188
EXPERIMENTS WITH
TRACT 36.
Table of Regular Mean Resistances to several Figures.
Veioc.
per
sec.
Sin a ]i
Mentis.
flat
Whole
Globe
Cylin-
der
l,arge
Hem is.
Rati 0of 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
21
4-9
2-33
5
3-6
3-6
8-3
3-5
7-3
3-2
7-6
2-38
6
5-2
5-0
11-5
4-8
10-5
4-7
10-8
2-30
7
7-1
6-6
15-2
6-4
14-2
6-3
14-5
2-30
8
9-2
8-6
19-5
8-S
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
300
13-0
28-9
12-4
29-3
2-36
11
17-5
16-1
36-4
15-8
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
500
20-9
50-5
2-42
14
28-8
26'2
596
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 1
2-42
16
37-9
34-4
79-0
33-9
7,8*0
32-4
78-6 !
2-43
17
42-9
38-9
90-1
38-4
89-2
369
89-8 :
2-43
18
43-2
43-8
102-3
43-3
101-5
41-8
102-1
2-44
19
53-9
49-0
1 15-5 1
48-5
1148
47-1
115-4
2-45
20
60-1
54-6
129 8 |
540
129-2
52 8
129-3
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 ahvays thegreater numbers by the less; showing that they proceed al-ways 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 would be betw-een 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 ol the same shape, and then