Image from the Biodiversity Heritage Library.
Contributed by American Museum of Natural History Library.
| www.biodiversitylibrary.org
Transcription
Mean Refraction Table
All-
Ref.
0°
36' 29.4"
1
24 53.6
2
18 25.5
3
14 25.1
4
11 44.4
5
9 52.0
6.
8 28.0
7
7 23.8
8
6 33.3
9
5 52.6
10
5 19.2
12
4 27.5
14
3 49.5
16
3 20.5
18
2 57.5
22
2 23.3
26
1 58.9
30
1 40.6
40
1 9.4
50
48.9
60
33.6
70
21.2
80
10.3
90
00.0