TABLE X.

For finding the Distance of Terrestrial Objects at Sea, in Statute Miles.

920 40.13 3100 73.7 940 40.56 3200 74.8 960 40.99 3300 76.0 980 41:42 3400 77.1 1000 41.80 3500 78.3 1100 43.90 3600 79.4 1200 45.80 3700 80.5

in feet.

Height Distance. Height Distance. Height Distance. Height Distance, Height Distance.1 Height Distance. Height
Mil. Dec. in feet. Mil. Dec.

Distance.

in feet. Mil. Dec. in feet. Mil. Dec. in feet. Mil. Dec. in feet. Mü. Dec. in feet. Mil. Dec.

55 9.81
60 10.25
65 10.67

456789

2.65 29 7.12

70 11.07

2.96 30

7.25

29.58 30.17 30.74

3.74 33

7.60

10

4.18 35

7.83 7.94 8.05 8.16 8.26 8.37

8.57

5.77 44 8.78
5.92 45
8.87
6.06 46 8.97
6.21 47 9.07
6.34 48 9.17
49
9.26
50

I 2 3 4 5 6 8 JO 2 3 4 5 6 20 I 2 3 4 5 6

I

210 19.17 460 28.37 220 19.62 470 28.68 230 20.06 480 28.98 240 20.50 490 29.29 75 11.46 250 20.92 500 80 11.83 260 21.33 520 85 12.20 270 21.74 540 90 12.55 280 22.14 560 31.31 1300 47.70 3800 81.6 95 12.89 290 22.53 580 31.86 1400 49.50 3900 82.6 100 13.23 300 22.91 600 32.41 1500 51.20 4000 83.7 105 13.56 310 23.29 620 32.94 1600 52.90 4100 84.7 110 13.88 320 23.67 640 33.47 1700 54.50 4200 85.7 115 14.19 330 24.03 660 33.99 1800 56.10 4300 86.8 120 14.49 340 24.39 680 34.50 1900 57.72 4408 87.8 125 14.79 350 24.75 700 35.00 2000 59.20 4500 88.7 130 15.08 360 25.10 720 35.50 2100 60.60 460089.7 135 15.37 370 25.45 740 35.99 2200 62.10 4700 90.7 140 15.65 380 25.79 760 36.47 2300 63.40 4800 91.7 145 15.93 390 26.13 780 36.95 2400 64.80 4900 92.6 150 16.20 400 26.46 800 37.42 2500 66.10 5000 93.5 160 16.73 410 26.79 820 37.88 2600 67.50 1 mile 96.1 170 17.25 420 27.11 840 38.34 2700 68.70 180 17.75 430 27.43 860 38.80 2800 70.00 190 18.24 440 27.75 880 39.25 2900 71.20 18.71 | 450 28.06|900|39.69 | 3000 72.50

1 2 3 4 5 6 7 8 9 10 11121314 15 16 17 18 19 20 21 22 23 24 25 26 27 28 3035 D. 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 91011121314 15 16 17 18 19 20 21 22 23 23 10 10 11 12 13 14 15 16 16 17 18 19 20 21 22 9101111 12 13 14 15 16 16 17 18 19 20 20 9101111 12 13 14 15 15 16 17 18 18 19 10 10 11 12 12 13 14 15 15 16 17 18 18 10 11 12 13 13 14 15 15 16 1717 10 10 11 12 12 13 14 14 15 16 16 910 10 11 12 12 13 14 14 15 15 9 910101111 12 13 13 14

35 I 2 234
40 I 2 2 3 4
43 I 1 2 3 4 4
461123345
49 11233455

55 11 2 33
58 11 2 3 3 4
61 0112 2 3 3

2 2 3

11

26 27 28 30 35 0 26 27 28 30 35 10 24 25 26 28 33 20 23 23 24 26 30 30 21 22 23 25 29 35 20 21 21 23 27 40 19 20 20 22 26 43 18 19 19 21|24|46| 17 18 18 20 23 49 16 17 17 18 22 52 15 15 16 17 20 55

11 12 12 13 13 14 14 15 16 1958 12 13 13 14151761 1010111112121315 64 10 10111121467

Seek the nearest number to the reduced time in the top column, and the difference of parallax, proportional logarithm, or semi-diameter for 12 hours in the side column; under the former, and opposite the latter, is the correction to be applied to the number, marked first in the Nautical Almanac, additive if increasing, subtractive if decreasing.

Variation in

12 hours.

h

Reduced Time.

hhhhhhhhhhh

hhhhhhhhhhh

h

011 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 114 12

Ꮒ

hhhhhhhhhhh hhhhhhhhhhh 123 13 13 14 14 15 15 16 16 17 17 18 18 19 19 20 20 21 214 22 22 23 234

4200000

12345

6.789

10

11

12

13

14

I I

22333

22

12222

I

2

2

2

3 3

2 3 3

3
34

4

3 4

4

4 4

4

3 4 5
3 45

4

I 2

2

2

3

3 3

3 4

3 3

44556

6677

444551667

33444

55566

3 3

4 4

55

56

6 6

h

བལ་

24

88 88 9

9 9 10 9 9 10 10 II

12

13

14

15

16

17

18

19

769

20

8

8

9110 10 10

10 II II

991811 11 12 9 10 11 11 12 13 9 10 10 11 12 13 13 9 9 10 11 12 13 13 14 910 11 12 12 13 14 15 9 10 10 11 12 13 14 15 16 9 10 11 12 13 14 15 16 16 9 10 11 II 12 13 14 15 16 17 9 10 11 12 13 14 15 16 17 18 9 10 11 12 14 15 16 17 18 19 10 11 12 13 14 15 16 17 18 19 21 22 23 24 25 10 11 12 13 15 16 17 18 19 20 21 22 24 25 26 12 13 14 15 19 20 21 22 23 24 26 27 12 13 14 16 17 18 19 21 22 23 24 25 27 28 12 14 15 16 17 19 20 21 22 24 25 26 27 29 9 10 12 13 14 15 17 18 19 21 22 23 25 26 27 28 30 9 11 12 13 15 16 17 19 20 21 23 24 25 27 28 29 31 8 10 11 12 14 15 16 18 19 21 22 23 25 26 27 29 30 32 8 10 11 13 14 16 17 18 20 21 23 24 25 27 28 30 31 33 9 10 12 13 15 16 17 19 20 22 23 25 26 28 29 31 32 34 9 10 12 13 15 16 18 19 21 22 24 25 27 28 30 31 33 34 9 11 12 14 15 17 18 20 22 23 25 26 28 29 31 32 34 35 9 11 13 14 16 17 19 21 22 24 25 27 28 30 32 33 35 36 5 6 8 10 11 13 15 16 18 19 21 23 24 26 28 29 31 32 34 36 37 32 33 35 37 38 32 34 36 38 39 33 35 37 38 40 34 36 38 39 41 35 37 38 40 42 36 37 39 41 43

8

I 3 4 57 8
3 4
7
3467
I 34 6

34 6

133333

12222

7

788

568

2 3578 10 12 13 15 17 18 20 22 23 25 27 28 30

41 2 3 5 7 9 10

235
2 4 5

2 4 5 7
24

9 10 911 911 7 9 II

12 14 15 17 19 20 22 24 26 27 29 31
12 14 16 17 19 21 23 24 26 28 30 31
13 14 16 18 20 21 23 25 27 29 30 32
13 15 16 18 20 22 24 26 27 29 31 33
13 15 17 19 21 |22| 24 |26| 28 30 32 34

21

22

23

24

25

26 27

28

29

30

31 32 33 34

35

36

37

38

39

40

41

42

43

44 45

NOTE TO TABLE XVI.-The numbers of this Table below the black lines, are the same as are given in Table XIII, the visible horizon, corresponding to those heights,

TABLE XVI.

Dip of the Sea at different Distances from the

Land in Sea

Miles.

Observer.

Height of the Eye above the Sea in Feet.

5 10 15 20 25 30 35 40 Dip. Dip. Dip. Dip. Dip. Dip. Dip. Dip.

M.

M. M.

M.

16433322

M.

23 34 45 57

286

M. M. 68 79 91

17 23 28 34 40 45 23 27 30

12 15 19

17 20

23

12 14

16 12 14 16

19

415

7

When a Star, or either of the Planets Jupiter or Saturn, is observed.

*Ap. Cor. Alt. DMM S 054.45 1.2277 354.47 1.2297 654.48 1.2317 9 54.50 1.2337 1254.511.2357] 15 54.53 1.2377 10.18 54.54 1.2397 21 54.56 1.2417 24 54.57 1.2437 27 54.58 1.2457 14. 30 55. 01.2476 3355. 11.2496 7.052.39 1.0849 10.36 55. 31.2515 3955. 41.2534 4255. 51.2553 45 55. 71.2572 4855. 81.2591 51 55. 91.2610

10.52.49 1.0941 20 52.58 1.1032 30 53. 61.1120 35 53.11 1.1164 40 53.15 1.1207

7.45 53.19 1.1250

10.54 55.11 1.2629 4853.211.1275) 57 55.12 1.2648 51 53.241.1301 11. 055.13 1.2667

5453.26 1.1326

5753.28 1.1351

8. o 53.30 1.1376

50 56.12 1.3612
55 56.13 1.3637
056.15 1.3662
556.16 1.3687
10 56.171.3711

20 56.20 1.3759
25 56.211.3783
30 56.22 1.3807

35 56.241.3831

40 56.25 1.3855 14.45 56.26 1.3878 50 56.28 1.3901 55 56.29 1.3924 0.56.30 1.3947 556.31 1.3970 10 56.32 1.3993 15.15 56.33 1.4016

10 57.26 1.5170 40. o 58.52 1.7854 20 57.27 1.5204 30 58.53 1.7900 30 57.29 1.5238 41. 058.551.79.16 40 57.30 1.5271 30 58.56 1.7987 50 57.31 1.5304 42. 058.57 1.8028

14.15 56.19 1.3735 21. 057.33 1.5338 42.30 58.58 1.8070 10 57.34 1.5370 43. 058.59 1.8112 20 57.35 1.5401 3059. 01.8152 30 57.36 1.5432 44. 059. 11. 1.8192 4057.37 1.5463 3059. 21.8230 50 57.39 1.5494 45. o59. 31.8268 22. 057.40 1.5525 46. 59. 51.8338 59. 71.8411 59. 91.8478 59.11 1.8547 59.12 1.8611 59.141.8676 59.16 1.8734 59.17 1.8794 59.191.8846 59.20 1.8900 59.22 1.8956 59.231.9003 59.241.9050

355.14 1.2686 15.
655.16 1.2705|
55.171.2724

9

20 56.34 1.4039
25 56.36 1.4061
30 56.37 1.4083
35 56.38 1.4105

40 56.39 1.4127

1057.41 1.5556 47. 2057.42 1.5586 48. 30 57.43 1.5616 49. 40 57.44 1.5646 50. 50 57.45 1.5676 51. 23. 057.46 1.5706 52. 1057.47 1.5736 53. 20 57.49 1.5765 54. 30 57.50 1.5794 55. 40 57.51 1.5822 56. 50 57.52 1.5850 57.

15.45 56.401.4149 24. 057.53 1.5879 58.

33 55.27 1.2868
36/55.28 1.2886
39 55.29 1.2904 16.
4255.30 1.2922
45 55.31 1.2940
11.4855.32 1.2957

50 56.41 1.4171
55 56.42 1.4193
056.43 1.4214
556.44 1.4236|
10 56.45 1.4258

16.15 56.461.427925. 057.58 1.6044 64.

59.32 1.9302

355.38 1.3042

20 56.471.4300
25 56.48 1.4321
30 56.49 1.4342
35 56.50 1.4363
40 56.51 1.4384

51 55.34 1.2974
54 55.35 1.2991
5755.36 1.3008

51 54. 61.1781 12. 055.37 1.3025 54 54.08 1.1804) 8.5754.10 1.1826 12. 9. 054.12 1.1849

354.13 1.1871 654.15 1.1893 954.171.1916 1254.19 1.1938

1255.41 1.3093

20 58.101.6400 71.
40 58.12 1.6449 72.

1555.421.3110 17. 056.55 1.4465 28. 058.131.6498 73.

1855.43 1.3127
21 55.44 1.3144

5 56.56 1.4486
10 56.57 1.4506|
17.15 56.58 1.4526 29.
20 56.59 1.4546|
2557. 01.4566 30.
3057. 11.4586|
3557. 21.4606 31.
40 57. 31.4626|
17.45 57. 41.4646 32.
45 55.52 1.3275 50 57. 41.4665|
48 55.53 1.3291 55 57. 51.4684 33.
51 55.541.3307 18. 057. 61.4703
54 55.551.3323)
5755.56 1.3339

20 58.15 1.6545 74. 40 58.16 1.659175. 058.18 1.6635 76. 30 58.20 1.6702 77. 058.22 1.6769 78. 30 58.24 1.683379. 058.25 1.6896 80. 30 58.27 1.6957 81. 058.291.7018 82. 30 58.31 1.707983. 058.33 1.7146 84. 30 58.34 1.7202 85. 058.36 1.7262 86. 30 58.37 1.7312 87.

1057. 81.4741 34.
2057. 91.4778
18.30 57.11 1.4815 35. 058.39 1.7362 88.
40 57.13 1.4852 30 58.40 1.7414 89.
50 57.141.4888 36. 058.421.7466 90.

59.421.9553 59.43 1.9578 59.44 1.9603 59.45 1.9625 59.461.9643 59.47 1.9660 59.48 1.9676

59.49 1.9692

When the Planet Venus or Mars is used, and the Parallax is nearly equal to 5′′

5454.47 1.2300

45 55.571.3359
48 55.58 1.3376
51 55.59 1.3392
54 56.00 1.3408
57 56.01 1.3424

50 56.58 1.4535
55 56.59 1.4556
057.00 1.4577 28.
557.01 1.4597
10 57.02 1.4618

35 57.07 1.4720 31. 058.30 1.7095 80. 40 57.07 1.4740 30 58.32 1.7160 81. 17.45 57.08 1.4760 32. 058.33 1.7224 82. 50 57.09 1.4780 30 58.35 1.7287 83. 55 57.10 1.4800 33. 058.37 1.7349 84. 18.057.11 1.4820 30 58.38 1.7409 85. JO 57.13 1.4859 34. 058.40 1.7468 86. 2057.14 1.4898 30 58.41 1.7526 87. 18.30 57.16 1.4936 35. 058.43 1.7584 88. 4057.17 1.4974 30 58.44 1.7640 89.

59.52 2.0106 59.53 2.0118 59.542.0129 59.55 2.0139 59.55 2.0147 59.56 2.0153 59.57 2.0158

59.58 2.0162

59.59 2.0164