MAGNETIC DECLINATION AT BOMBAY. 
375 
Table XI. — Showing, for the half years including the months from April to September 
in the several years 1859 to 1865, and in the whole period of seven years, the mean 
diurnal variation of Declination. 
Bombay 
Astronomi- 
cal Hours. 
1859. 
1860. 
1861. 
1862. 
1863. 
1864. 
1865. 
Seven Years, 
1859 to 1865. 
h m 
0 12 
-2-715 
-2-867 
-2-590 
-2-354 
-2-461 
-2-325 
-2-118 
-2-490 
1 12 
-2-625 
-2-623 
-2-436 
-2-245 
-2-304 
-2128 
-2021 
-2-340 
2 12 
-2-038 
-1-992 
-1-748 
-1-508 
-1 657 
-1-689 
-1-537 
- 1-738 
3 12 
— 1-108 
-0-997 
-0-777 
-0-605 
-0785 
-0717 
-0-682 
-0 810 
4 12 
-0138 
-0-122 
+0-022 
+0149 
-0-086 
—0 115 
-0-165 
-0065 
5 12 
+0-065 
+0-223 
+0-262 
+0135 
+0-119 
+0-102 
+0063 
+0138 
6 12 
-0010 
+0164 
+0-028 
— 0111 
-0013 
-0-109 
-0-130 
-0-026 
7 12 
-0-320 
-0-206 
-0-302 
-0-326 
-0-274 
-0-313 
-0-288 
-0-290 
8 12 
-0-297 
-0-281 
-0-312 
-0-383 
-0-353 
-0-360 
-0-250 
-0-319 
9 12 
-0-153 
-0-208 
-0-218 
-0-223 
—0-181 
-0-209 
-0162 
-0-193 
10 12 
-0-095 
-0 064 
-0101 
-0102 
-0-078 
-0-079 
-0-046 
-0-081 
11 12 
+0011 
-0001 
+0-078 
-0008 
+0-084 
+0-073 
+0-160 
+0-057 
12 12 
+0-180 
+0109 
+0-166 
+0157 
+0-247 
+0-182 
+0-243 
+0183 
13 12 
+0-294 
+0-259 
+0-295 
+0-308 
+0-336 
+0-336 
+0-332 
+0-309 
14 12 
+0-277 
+0-282 
+0-384 
+0-350 
+0-419 
+0417 
+0-449 
+0-368 
15 12 
+0-282 
+0-222 
+0-325 
+0-351 
+0-434 
+0 407 
+0-385 
+0-344 
16 12 
+0-300 
+0-301 
+0-326 
+0-300 
+0 403 
+0-409 
+0-395 
+0-348 
17 12 
+0-590 
+0-758 
+0-704 
+0-626 
+0-683 
+0 612 
+0-609 
+0-655 
18 12 
+ 1-969 
+2-008 
+1-925 
+ 1-794 
+ 1-643 
+ 1-613 
+ 1-464 
+ 1-774 
1.9 12 
+2-797 
+2-969 
+2-775 
+2-497 
+2-348 
+2-287 
+2-162 
+2-548 
20 12 
+2-854 
+2-891 
+2-426 
+2-235 
+2-156 
+2-243 
+2-013 
+2-403 
21 12 
+ 1676 
+ 1-556 
+ 1-145 
+ M07 
+ 1-007 
+ 1-242 
+0-901 
+ 1-233 
22 12 
— 0-141 
-0-348 
-0459 
-0-472 
-0-229 
-0-314 
-0-372 
-0334 
23 12 
— 1-651 
-2 025 
— 1-917 
-1-674 
-1-459 
— 1 -555 
-1-406 
-1-670 
Curves representing these variations are figured 23 to 30 on Plate XXVII. 
Table XII. — Showing, for the half years including the months from January to March 
and October to December in the several years 1859 to 1865, and in the whole 
period of seven years, the mean diurnal variation of Declination. 
Bombay 
Astronomi- 
cal Hours. 
1859. 
1860. 
1861. 
1862. 
1863. 
1864. 
1865. 
Seven Years, 
1859 to 1865. 
h m 
0 12 
-0-493 
-0-556 
-0-749 
-0-754 
-0-664 
-0-664 
-0-881 
-0-680 
1 12 
-0410 
-0-458 
-0591 
-0-446 
-0 333 
-0-332 
-0-479 
-0-436 
2 12 
-0135 
-0156 
-0-287 
+0-270 
+0 029 
-0-087 
+0-001 
-0-052 
3 12 
— 0006 
-0019 
+0076 
+0-285 
+0134 
+0-158 
+0-333 
+0-137 
4 12 
-0075 
+0126 
+0-225 
+0-305 
+0-226 
+0192 
+0-462 
+0-209 
5 12 
-0-412 
-0-236 
-0096 
-0-215 
-0-011 
+0-024 
+0186 
-0-109 
6 12 
-0-540 
-0-468 
-0046 
-0-187 
-0-071 
-0-037 
+0-164 
-0-169 
7 12 
-0077 
-0-077 
+0-018 
+0013 
+0-032 
+0-079 
+0-294 
+0040 
8 12 
+0011 
-0 034 
+0-089 
-0-011 
+0-106 
+0-089 
+0-264 
+0-073 
9 12 
-0016 
-0-039 
+0062 
+0 050 
+0-124 
+0-106 
+0-254 
+0-077 
10 12 
+0073 
-0021 
+0 045 
+0-065 
+0105 
+0-187 
+0-280 
+0-105 
11 12 
+0181 
+0141 
+0-132 
+0098 
+0-192 
+0-213 
+0-308 
+0-181 
12 12 
+0-158 
+0140 
+0 158 
+0-106 
+0-120 
+0-193 
+0-285 
+0-254 
+0-187 
13 12 
+0-160 
+0154 
+0-138 
+0162 
+0-229 
+0-209 
+0-165 
14 12 
+0-078 
+0073 
+0 057 
+0055 
+0-066 
+0-124 
-0014 
+0-063 
15 12 
-0056 
-0-058 
-0-088 
+0166 
-0-079 
-0041 
-0-071 
-0 032 
16 12 
-0-284 
-0 242 
-0-210 
-0158 
-0 274 
-0140 
-0171 
-0-211 
17 12 
-0-230 
-0-396 
-0-366 
-0-313 
-0-390 
-0 361 
—0-31 1 
-0-338 
18 12 
-0-365 
-0-431 
-0105 
-0-267 
-0-426 
-0-393 
-0-328 
-0331 
19 12 
-0178 
—0-058 
-0-053 
-0-139 
-0-329 
-0-260 
-0-127 
-0-163 
20 12 
+0-756 
+0-688 
+0-608 
+0-431 
+0-257 
+0-216 
+0-169 
+0-446 
21 12 
+ 1-236 
+ 1-207 
+0-865 
+0-783 
+0-643 
+0-524 
+0-214 
+0-782 
22 12 
+0-764 
+0-864 
+0-515 
+0-311 
+0-771 
+0-246 
-0-189 
+0-469 
23 12 
-0-139 
-0144 
-0-357 
-0-561 
-0454 
-0-350 
-0-824 
-0 404 
Curves representing these variations are figured (in broken lines) on Plate XXVII. 
Nos. 23 to 30. Viewed together with the continuous curves from April to September, 
