Page 148] TABLE 18, 19, 20. 
TABLE 18 TABLE 19. 
Dip of the Sea Dip of the Sea at different Distances from the Observer. 
Horizon. 
Height of! Dip of the Dist. of Height of the Eye above the Sea in Feet. 
Land in 
the Eye. | Horizon. sen, Miles. 
” 
0 59 
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Nore Tro Taste 19.—The numbers of this Table below the black lines 
are the same as are given in Table 18, the visible horizon corresponding 
to those heights not being so far distant as the land. 
TABLE 20. 
The Sun’s Parallax 
in Altitude. 
Altitude. Parallax. 
3 24 
3 32 
3 40 
3 48 
3 55 
4 02 
4 09 
4 16 
4 23 
4 29 
4 36 
4 42 
44 
4 5 
5 0 
5 0 
51 
51 
5 2 
5 2 
5 3 
5 3 
5 4 
5 4 
5 5. 
55 
6 0 
60 
61 
6 3 
65 
U al 
73 
7 5: 
81 
8 2 
8 4 
90 
91 
93 
94 
8 
4. 
10 
6 
1 
7 
2, 
7 
3 
8 
3 
8 
3 
8 
2 
7 
2 
6 
6 
6 
D 
4 
2 
9 
6 
2 
8 
3 
8 
CHEN NWRROMD~T0MCOO S 
