238 



Abstracts of the Makerstoun Observations, 1843. 



Diurnal Ranges of the Horizontal Component of Magnetic Force, with reference to the 

 Relative Positions of the Sun, Moon, and Earth, as indicated by the Moon's Age. 



The general aspect of the partial means, if we reject those for the 28th, 6th, and 7th. days, whicli 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. 



Means of Groups. 

 27 days to 1 day, Moon farthest North, 0-002680 



2 ... 



... 5 



6 ... 



... 8 



9 ... 



... 12 



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. 



Decenfter. 





0-01 



0-01 



0-01 



0-01 



0-01 



0-(ll 



0-01 



O'Ol 



0-01 



0-01 



0-01 



Ml 



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 



5089 



5 



7020 



[6834] 



6686] 



6680 



5996 



5904 



5902 



5713 





5037 



[5345] 



5198 



6 



6988 



6869 



6553 



6282 



5702 



5886 



5886 



[5620] 



5358 



4980 



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 



5988 



5683 



[5494] 



5327 



5412 



[5223] 



11 



7140 



6652 



6513 



6218 



6034 



[6042] 



5934 



5748 



5552 



5341 



5345 



5180 



12 



7012 



[6744] 



[6569] 



6400 



6107 



6114 



5992 



5673 



5462 



5334 



[5386] 



5294 



13 



6997 



6696 



6587 



6152 



6054 



6133 



5862 



[5737] 



5404 



5519 





5265 



14 



7041 



6737 



6507 



6101 



[6063] 



6058 



5823 



5789 



5538 



5548 



5314 



5223 1 



15 



[6988] 



6746 



6484 



6247 



6034 



6034 



5825 



5800 



5321 



[5536] 



5488 



5183 



16 



6927 



6758 



6452 



[6160] 



6089 



6033 



[5828] 



5732 



5408 



5554 



5430 



5195 i 



17 



6983 



6747 



6502 



6097 



6062 



6196 



5856 



5717 



[5385] 



5750 



5340 



[5181] i 



18 



6969 



6667 



6524 



6197 



5962 



[6027] 



5829 



5869 



5262 



5511 



5351 



5183 j 



19 



6890 



[6701] 



[6421] 



6172 



6013 



6072 



5775 



5967 



5344 



5199 



[5304] 



5137 



