HorizonTaL CoMPONENT OF MAGNETIC Force, 1845. 11 
TABLE XVIII.—Mean Values of the Variations of the Horizontal Component of Magnetic Force, 
the whole Horizontal Component being Unity, for each Civil Week-Day and Week of 1845. 
Jan. Feb. March. | April. 
0-00 0-00 0-00 0:00 
4476 | 4890 | 4756 | 5030 
4831 | [4903] | [5031]| 5306 
5184 | 5141 | 5158 | 5114 
5307 | 5096 | 5352 | 5025 
[5368]} 5193 | 5326 | 5034 
5573 | 4385 | 5327 | [5144] 
5645 | 4984 | 5523 | 5249 
5669 | 4987 | 5279 | 5067 
4095 | [4938] | [5248]| 5373 
3605 | 5005 | 5030 | 5433 
4970 | 5086 | 5005 | 5260 
[4686]]} 5179 | 5324 | 5506 
4812 | 5366 | 5162 | [4625] 
5309 | 5314 | 5082 | 2008 
5327 | 5317 | 4957 | 4714 
5166 | [5367]| [4981]| 4829 
| 5383 | 5383 | 4833 | 4784 
5230 | 5365 | 5113 | 5124 
[4971]| 5456 | 4742 | 5019 
3602 | 5904 | 4803 | [4831] 
5198 | 4718 | 4847 | 4332 
5247 | 4663 | 4803 | 4567 
5019 | [4762]| [4707]| 5158 
4637 | 4312 | 4719 | 5407 
4883 | 4479 | 4186 | 4960 
[4955]| 4498 | 4886 | 5054 
5039 | 4886 | 4416 | [4866] 
5033 | 4708 | 5004 | 4305 
5121 4917 | 4452 
4542 [4971]| 5022 
4557 5156 
TABLE XIX.—Mean Variations of the Horizontal Component of Magnetic Force, after eliminat- 
ing the Secular Change, with reference to the Moon’s Age, Declination, and Distance from the 
Earth, for 1845. 
Variations Variations Variations | After | Variations Variations | Before | Variations 
of Hori- ! of Hori- of Hori- Moon | of Hori- of Hori- and of Hori- 
zontal . zontal zontal farthest} zontal zontal after zontal 
Component. Component. Component.| North. | Component. || Perigee.] Component. | Apogee.| Component. 
0-00 5 0-00 : 0-00 : 0-00 
0241 0311 0441 0497 
0256 0239 0381 0503 
0231 0111 0443 0510 
0164 0265 0209 0329 
0200 0370 0312 0000 
0214 0135 0249 0310 
0118 0291 0227 0339 
0230 0246 0150 0394 
0336 0000 0213 0426 
0217 0260 0286 0370 
0199 0399 0258 0429 
0431 0367 0391 0496 
0370 0294 0332 0486 
0409 0346 0331 0464 
0372 0350 
0-00 
0209 
0321 
0241 
0315 
0177 
0289 
0423 
0482 
0424 
0167 
0000 
0227 
0358 
0311 
0234 
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