the mean Denfity of the Earth. 731 
SECTION 17. 
8 
0 / 
0 / 
6 55 
78 7 
531 
Pole. 
Vert. z.’s 
at H. 
Bearings 
at g. 
Diff. of 
Ait. 
9 
8 33 
81 13 
737 
0 / 
0 / 
10 
9 28 
88 4 
1 108 
1 
12 15 D 
16 13 
242 D 
1 1 
9 3 8 
89 10 
1201 
2 
7 11 
25 6 
2l6 
12 
9 53 
89 58 
1290 
3 
4 19 
33 3 
171 
x 3 
10 24 
9 ° 33 
i 4°7 
4 
1 49 
I 59 E 
38 20 
45 24 
82 
II9 A 
H 
1 1 2 
91 io 
1552 
5 
6 
3 3 8 
5 ° 3 
243 
SECT! 
[ON 19 . 
7 
5 10 
53 33 
377 
Pole 
Vert. Z.’s 
Bearings 
Diff. of 
8 
at w. 
at l. 
Alt. 
7 10 
57 3 
572 
9 
8 17 
60 46 
73 1 
1 
18 8 D 
i °4 51 
l68 D 
10 
8 45 
62 58 
820 
2 
16 28 
3 1 3 8 
388 
11 
9 53 
66 56 
1038 
3 
53 
39 42 
394 
12 
10 24 
69 0 
1 1 6 1 
4 
7 47 
42 48 
292 
i 3 
45 
7 ° 35 
1260 
5 
4 11 
46 12 
180 
14 
11 31 
72 15 
1424 
6 
2 10 
48 6 
100 
i 5 
12 10 
73 55 
*590 
7 
0 31 
50 16 
2 3 
16 
12 31 
75 7 
1703 
8 
2 24 E 
52 45 
I48 A 
SECTi 
[ON ] 
[8. 
9 
5 55 
54 48 
5 6 3 ° 
402 
.657 
10 
8 48 
Vert. z.’s 
Bearings 
1 TV-fT 
Pole. 
U in. or 
Alt. 
at h. 
at w. 
SECTION 20 . 
1 
0 / 
13 35 d 
0 / 
21 40 
l86 D 
Pole. 
Vert. z.’s 
Bearings 
Diff. of 
2 
9 * 7 i 
43 28 
263 
at w. 
at L. 
O / 
Alt. 
3 
5 21 
55 3 
203 
1 
22 45 D 
7 37 
98 D 
4 
2 4 
63 8 
95 
2 
19 0 
16 20 
179 
5 
1 2 3 E 
69 50 
84 A 
3 
18 41 
31 8 
3 6 7 
6 
3 37 
73 24 
238 
4 
14 20 
4 * 54 
412 
7 
5 2 5 
76 0 
386 
5 
9 4 i 
48 4 
341 
4X2 
