VARIATION OP TERRESTRIAL MAGNETISM. 
485 
Table X.—Numerical values for the zonal harmonics, their differential coefficients, 
and the functions T/. 
P? 
P, 
dFJd/t 
dPJdfi 
dPJd^t. 
d^fj 
d^F^ld^^ 
d^Fljdfj? 
d^FJd^^ 
d^F,ld^fi 
d^F^ldfj? 
d^F^jdix^ 
d^PJdfi^ 
d^PJd^i^ 
d^Pjdfi^ 
d^PJd^i^ 
d^PJdfi^ 
d^P^jd/ii^ 
d^P,ldf^^ 
Td 
Td 
T 1 
-*■3 
Td 
Td 
Td 
T,2 
T 2 
-*-3 
Td 
Td 
T 2 
-*-6 
T 2 
•*-7 
T2 
T3 
Td 
T 3 
-‘-8 
m 4 
-■-s 
Td 
Bombay. 
Lisbon. 
Greenwich. 
St. Petersburg. 
+ 0-3239 
+ 
0-6255 
+ 
0-78-24 
+ 
0-8654 
- 0-3426 
+ 
0-0868 
+ 
0-4183 
+ 
0-6235 
- 0-4009 
— 
0-3265 
+ 
0-0238 
+ 
0-3224 
+ 0-0297 
— 
0-4225 
— 
0-2811 
+ 
0-0206 
+ 0-3380 
— 
0-2144 
— 
0-4149 
— 
0-2258 
+ 0-1760 
+ 
0-1061 
— 
0-3620 
— 
0-3754 
1 
+ 0-9718 
+ 
1-8764 
+ 
2-3473 
+ 
2-5963 
- 0-7131 
+ 
1-4341 
+ 
3-0914 
+ 
4-1174 
- 1-8346 
— 
0-4089 
+ 
2-5142 
+ 
4-8529 
- 0-4457 
— 
2-3681 
+ 
0-5618 
+ 
4-3029 
+ 1-8839 
— 
2-7679 
— 
2-0498 
+ 
2-3692 
+ 1-8421 
— 
0-9882 
— 
4-1305 
0-5776 
+ 3-0000 
+ 
3-0000 
+ 
3-0000 
+ 
3-0000 
+ 4-8588 
+ 
9-3821 
+ 
11-7364 
+ 
12-9816 
- 1-9916 
+ 
13-0386 
+ 
24-6401 
+ 
31-8221 ; 
- 11-6529 
+ 
5-7017 
+ 
34-3644 
+ 
56-6573 j 
- 6-8945 
— 
13-0104 
+ 
30-8207 
+ 
79-1540 1 
+ 12-8380 
— 
30-2804 
+ 
7-7166 
+ 
87-4567 ! 
+ 20-7369 
— 
27-8334 
— 
31-1374 
+ 
70-4907 
+ 34-011 
-I- 
65-674 
+ 
82-155 
+ 
90-872 
- 94-170 
+ 
128-393 
+ 
460-164 
+ 
714-102 
+ 98-399 
— 
325-813 
+ 
575-912 
+ 
2025-953 
1 
+ 306-10 
+ 
591-07 
+ 
739-39 
+ 
817-84 
-918-11 
+ 2260-17 
+ 
6721-52 
+ 10101-17 
+ 754-68 
3278-66 
+ 16512-03 
+ 44542-37 
+ 0-9194 
+ 
1-4640 
+ 
1-4620 
+ 
1-3008 
- 0-6747 
+ 
1-1190 
+ 
1-9253 
+ 
2-0629 
- 1-7358 
— 
0-3190 
+ 
1-5658 
+ 
2-4313 
- 0-4217 
— 
1-8477 
+ 
0-3498 
+ 
2-1558 
+ 1-7825 
— 
2-1596 
— 
1-2766 
+ 
1-1870 
+ 1-7429 
— 
0-7710 
— 
2-5725 
— 
0-2894 
+ 2-685 
+ 
1-826 
+ 
1-163 
+ 
0-753 
+ 4-349 
+ 
5-712 
+ 
4-551 
+ 
3-258 
- 1-783 
+ 
7-938 
+ 
9-556 
+ 
7-987 
- 10-430 
+ 
3-471 
+ 
13-327 
+ 
14-221 
- 6-171 
— 
7-921 
+ 
11-953 
+ 
19-868 ! 
+ 11-491 
— 
18-435 
+ 
2-993 
+ 
21-952 
+ 18-561 
— 
16-945 
— 
12-075 
+ 
17-693 i 
+ 28-801 
+ 
31-195 
+ 
19-841 
+ 
11-427 
- 79-745 
+ 
60-985 
+ 
111-130 
+ 
89-801 
+ 83-326 
— 
154-760 
+ 
139-090 
+ 
254-770 
+ 245-23 
+ 
219-06 
+ 
111-20 
+ 
51-525 
-735-55 
+ 
837-66 
+ 
1010-90 
+ 
636-390 
+ 604-62 
1215-10 
+ 
2483-40 
+ 
2806-300 
