This section is from the book "Manual Of Useful Information", by J. C Thomas. Also available from Amazon: Manual of useful Information.
A Table showing the number of miles in degree of longitude at each degree of latitude.
Lat. | Miles. | Lat. | Miles. | Lat. | Miles. | Lat. | Miles. | Lat. | Miles. |
1° | 60. | 19° | 56.7 | 37° | 47.9 | 55° | 34.4 | 73° | 17.5 |
2 | 60. | 20 | 56.4 | 38 | 47.3 | 56 | 33.6 | 74 | 16.5 |
3 | 59.9 | 21 | 56.0 | 39 | 46.6 | 57 | 32.7 | 75 | 15.5 |
4 | 59.9 | 22 | 55.6 | 40 | 46.0 | 58 | 31.8 | 76 | 14.5 |
5 | 59.8 | 23 | 55.2 | 41 | 45.3 | 59 | 30.9 | 77 | 13.5 |
6! | 59.7 | 24 | 54.8 | 42 | 44.6 | 60 | 30.0 | 78 | 12.5 |
7 | 59 6 | 25 | 54.4 | 43 | 43.9 | 61 | 29.1 | 79 | 11.4 |
8 | 59.4 | 26 | 53.9 | 41 | 43.2 | 62 | 28.2 | 80 | 10.4 |
9 | 59.3 | 27 | 53.5 | 45 | 42.4 | 63 | 27.2 | 81 | 9.4 |
10 | 59.1 | 28 | 53.0 | 46 | 41.7 | 64 | 26.3 | 82 | 8.4 |
11 | 58.9 | 29 | 52.5 | 47 | 40 9 | 65 | 25.4 | 83 | 7.3 |
12 | 58.7 | 30 | 52.0 | 48 | 40.1 | 66 | 24.4 | 81 | 6.3 |
13 | 58.5 | 31 | 51.4 | 49 | 39.4 | 67 | 23.4 | 85 | 5.2 |
14 | 58.2 | 32 | 50.9 | 50 | 38.6 | 68 | 22.5 | 86 | 4.2 |
15 | 58.0 | 33 | 50.3 | 51 | 37.8 | 69 | 21.5 | 87 | 3.1 |
16 | 57.7 | b4 | 49.7 | 52 | 36.9 | 70 | 205 | 88 | 2.1 |
17 | 57.4 | 35 | 49.1 | 53 | 36.1 | 71 | 19.5 | 89 | 1.0 |
18 | 57.1 | 36 | 48.5 | 54 | 35.3 | 72 | 18.5 | 90 | 0.0 |
 
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