TRACT 26.
MEAN DENSITY OF THE EARTH.
6. For the sum of the sines below o in the N.E. quarter.
Rings
Radii.
Sura ofPerps.
3-2 =Sum ofTangs.
1
2
3
4 5
6
7
8
9 10
11
12
Sum ofDiffs.
6
3667
180
0049
7
4333
11(50
268
•
8
5000
2t)80
596
*
9
5667
5210
919
1
1
1
1 1
5
10
63o3
7300
1T53
1
1
1
1 1
1
.
- •
•
-
6
11
7000
94^0
1-349
1
2
2
2 1
1
1
.
• •
•
-
10
12
7667
11460
1-495
2
2
2
2 2
1
1
1
. 1
1
15
13
8333
13080
1-570
1
1
1
1 2
2
1
1
1 1
1
1
14
14
9000
13290
1-477
1
1
1
1 1
1
1
1
1 1
1
1
12
15
^667
12670
1-311
1
1
1
1
1
1
1
1 1
1
1
11
If)
10333
12160
1-177
.
1
1 .
1
1
. 1
1
6'
17
11000
11850
1-077
1
.
1
1
1 .
1
1
6
12-441’
z: sum
Df the tangents
•085
■085
zi sum
of the differences.
12-356
— sum of the sines..
7.
For the sum of the sines below 0
in
the s.W. quarter.
|
1
2
3
4 5
6
7
8
9 10
11
12
1
333]-
1445
4-335
51
51
47
43 40
35 27
21
17 10
2
•344
2
IOOO
3460
3-460
28
27
26
25 19
17
13
9
6 5
2
1 77
3
K)(57
5370
3-222
21
19
17
15 13
IS
16
6
5 4
2
136
4
2833
6650
2-850
15
14
13
12 10
8
8
5
5 3
2
95
5
3000
7640
2-547
9
9
9
8 6
6
5
4
3 3
2
04
6
3607
8200
2'253
5
5
5
5 5
5
5
3
3 2
1
44
7
4333
8260
14J06
2
2
2
2 3
3
3
3
2 2
1
25
8
5000
7840
1-508
1
1
1
1 1
1
1
1
2 2
2
1
15
9
5667
65 SO
i-i6'i
1
1
1
1 1
1
1
1
1 1
1
11
10
0333
5680
897
1
1
1 1
1
5
11
7000
4450
63 6
1 .
.
1
•
•
1
3
12
7607
3i6'0
412
1
.
1
2
13
8333
2190
263
1
14
9000
1250
139
‘
15
9067
570
39
•
1(5
10333
210
20 .
25-/28
zz sum
of the tangents.
•922
0-92?
zz sum
of the differences.
24-806
= sum
of the sines.
--—-
*’ • •
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—