TRACT 26
MEAN DENSITY OF THE EARTH
35
O /
5
6 9
55 40
379
6
6 38
62 0
451
. 7
7 11
70 8
553
8
7 30
78 56
662
9
7 48
84 30
7 55
10
7 50
94 8
908
11
7 54
98 26
1006
12
7 53
100 58
1077
SECTION 55.
Pole
Vert. Z’s
Bearings
Diff. of
at t .
at f'.
Alt.
O /
O /
1
2 0 e
11 46
35 a
2
2 3
22 45
62
3
4 3
25 32
iso
4
7 32
34 49
324
5
9 15
42 55
497
6
9 52
48 8
604
7
10 30
53 40
736
8
10 33
62 34
917
9
11 7
66 12
1060
10
11 57
69 15
1235
11
11 52
73 19
1370
SECTION 56.
Pole
Vert. Z’s
Bearings
at
Diff. of
at t.
Alt.
O /
O /
1
3 11 E
9 4
41 A
2
4 27
16 21
97
3
7 15
21 33
205
4
9 12
27 0
331
5
10 30
29 15
414
6
11 18
31 14
480
7
11 26
35 39
569
8
12 21
38 50
68 6
9
12 42
41 44
777
10
13 18
44 21
887
11
13 S2
46 36
971
SECTION 57,
Pole
Vert. Z’sat k.
Bearingsat (.
Diff. ofAlt.
O /
O /
1
7 51 E
29 43
176 a
2
11 24
■ 34 13
299
3
13 22
37 54
397
4
14 52
42 20
509
5
16 40
47 44
675
6
16 46
50 15
833
SECTION 58.
Pole
Vert, Z*s
Bearings
Diff of
at k .
at t\
Alt.
O /
1
0 3 l
5 28
5 A
2
6 10
8 5
44
3
10 3
13 52
121
4
10 20
29 37
313
5
14 20
32 18
497
6
15 0
33 18
547
SECTION 59.
Pole
Vert. Z’s
Bearings
Diff of
at m'.
at h.
Alt.
1
28 16 D
O i
Not seen.
2
25 20
66 56
910 u
3
22 23
74 50
1056
4
22 12
76 20
1114
5
21 40
79 10
1232
6
21 20
83 32
1521
7
20 14
85 50
1656
8
19 12
87 30
1758
9
18 46
89 17
1978
10
17 30
90 20
2016
11
16 8
91 5
1990
12
14 42
92 27
2093
13
13 35
92 54
2035
14
12 46
93 14
1991
15
11 30
93 45
1915
16
10 30
94 7
1845
The following are the irregular sections. In the first co-lumn is the number of poles; in the second the vertical angles;in the third and fourth the two bearings, or horizontal angles,at each end of the base; and in the fifth the computed result,being the difference of altitude between the foot of each pole,and the point mentioned in the second column, where thevertical angles were taken.
VOL. II.
D