238 
Abstracts of the Makerstoun Observations, 1843. 
Diurnal Ranges op the Horizontal Component op Magnetic Force, with reference to the 
Relative Positions of the Sun, Moon, and Earth, as indicated by the Moon's Ace. 
The general aspect of the partial means, if we reject those for the 28th, 6th, and 7th days, which are 
much affected by disturbances, is that of a minimum near the time of new moon, and a maximum near the time 
of full moon. 
Means of Groups. 
14 days to 16 days, Full Moon, 0-002359 
17 20 ... 0-002163 
21 24 ... 0-001903 
25 28 ... 0-002494 
29 days to 1 day, New Moon, 0-002106 
2 5 ... 0002122 
6 9 ... 0-002882 
10 13 ... 0-002390 
Diurnal Ranges of the Horizontal Component of Magnetic Force, with Reference to the 
Moon's Declination. 
27 days to 1 day, Moon farthest North. 
2 5 ... 
6 8 ... 
9 12 ... 
Means of Groups. 
0-002680 
0-002882 
0-002304 
0-002209 
13 days to 15 days, Moon farthest South, 0-002278 
16 19 ... 0-002002 
20 22 ... 0-002124 
23 26 ... 0-002025 
These and the partial means indicate maxima about the periods of greatest north and south declinations, and 
minima when the declination is zero ; the maximum at the period of greatest south declination is not well 
marked. 
Vertical Component of Magnetic Force. 
TABLE XV. — Mean Values of the Variations of the Vertical Component of Magnetic Force (the 
whole Vertical Component being Unity), for each Civil Day as deduced from the Nine Daily 
Observations, for each "Week, and for each Month in the year 1843. 
Civil 
Day. 
January. 
February. 
March. 
April. 
May. 
June. 
July. 
August. 
September. 
October. 
November. 
December. 
O'Ol 
0*01 
(nil 
0-01 
0-01 
0-01 
0-01 
001 
o-oi 
0-01 
0-01 
0-01 
1 
[ ] 
6830 
6621 
6034 
5974 
5952 
5837 
5696 
[5251] 
5475 
5330 
2 
7042 
6896 
6635 
[6159] 
5971 
5905 
[5953] 
5688 
5134 
5431 
5370 
3 
6997 
6853 
6606 
6032 
5939 
5937 
5879 
5633 
[ ] 
5203 
5471 
[5260] 
4 
7078 
6772 
6538 
6077 
5951 
[5919] 
6013 
5895 
5182 
5282 
50S9 
5 
7020 
[6834] 
6686] 
6680 
5996 
5904 
5902 
5713 
5037 
[5345] 
5198 
6 
6988 
6869 
6553 
6282 
5702 
5886 
5886 
[5620] 
535S 
49S0 
5227 
5291 
7 
6933 
6821 
7120 
6224 
[5965] 
5931 
6005 
5574 
5475 
4931 
5283 
5152 
8 
[6991] 
6792 
6664 
6310 
6102 
5935 
5982 
5549 
5552 
[5160] 
5378 
5300 
9 
6881 
6809 
6715 
[6258] 
5969 
6024 
[5964] 
5351 
5519 
5341 
5367 
5146 
10 
6984 
6820 
6606 
6113 
6073 
5989 
59S8 
56S3 
[5494] 
5327 
5412 
[5223] 
ll 
7140 
6652 
6513 
6218 
6034 
[6042] 
5934 
574S 
5552 
5341 
5345 
51S0 
12 
7012 
[6744] 
[6569] 
6400 
6107 
6114 
5992 
5673 
5462 
5334 
[53S6] 
5294 
13 
6997 
6696 
6587 
6152 
6054 
6133 
5S62 
[5737] 
5404 
5519 
5265 
14 
7041 
6737 
6507 
6101 
[6063] 
6058 
5823 
57S9 
5538 
5548 
5314 
5223 
15 
[6988] 
6746 
6484 
6247 
6034 
6034 
5825 
5800 
5321 
[5536] 
5488 
51S3 
16 
6927 
6758 
6452 
[6160] 
6089 
6033 
[5S2S] 
5732 
540S 
5554 
5430 
5195 
17 
6983 
6747 
6502 
6097 
6062 
6196 
5856 
5717 
[5385] 
5750 
5340 
[5181] 
18 
6969 
6667 
6524 
6197 
5962 
[6027] 
5829 
5869 
5262 
5511 
5351 
51 S3 
19 
6890 
[6701] 
[6421] 
6172 
6013 
6072 
5775 
5967 
5344 
5199 
[5304] 
5137 
