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. . 4 
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 macimum near the time 
of full moon. 
Means of Groups. 
14 days to 16 ei Full Moon, 0:002359 ae days to 1 day, New Moon, 0:002106 
U0 Socons 20 ees O:OO2Z163; 9S 2! Speaee De: 0-002122 
PA oncne PRS ccd 0:001903 : pe tante @) soc 0:002882 
Pye aaeptio ht. chcoe 0-002494 LOW Seas 130s. 0-002390 p 
DIURNAL RANGES OF THE HORIZONTAL COMPONENT OF MAGNETIC FORCE, WITH REFERENCE TO THE 
Moon’s DECLINATION. 
Means of Groups. 
x days to 1 bo Moon farthest North, 0:002680 | 13 days to 15 ue Moon farthest South, 0-002278 
so. Bae 0:002882 | 16 ...... 19 0:002002 ; 
: sone Geis. 0:002304 | 20 ...... Aas 0:002124 PF, 
$) once Meise 0:002209 | 28 ...... 20) 2. 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. 
January. | February.| March. April. May. June. July. . |s | October. |November.| Decembel 
O01 O-01 0-01 0-01 0-01 0-01 o-0L ; 0-01 
1 [eceeee J 6830 6621 6034 5974 5952 5837 [5251] 
2 7042 6896 6635 (6159) 5971 5905 [5953] 5134 
3 6997 6853 6606 6032 5939 5937 5879 ‘ 5203 
4 7078 6772 6538 6077 5951 [5919] 6013 5182 
5 7020 [6834] 6686 | 6680 5996 5904 5902 5037 
6 6988 6869 6553 6282 5702 5886 5886 4980 
7 6933 6821 7120 6224 (5965) 5931 6005 4931 
8 (6991] 6792 6664 6310 6102 5935 5982 [5160] 
9 6881 6809 6715 [6258] 5969 6024 [5964] ‘ 5341 
10 6984 6820 6606 6113 6073 5989 5985 5 5327 
ll 7140 6652 6513 6218 6034 [6042] 5934 552 5341 
12 7012 [6744] | [6569] 6400 6107 6114 5992 5334 
13 6997 6696 6587 6152 6054 6133 5862 é 5519 
14 7041 6737 6507 6101 {6063 | 6058 5823 5548 
15 [6988] 6746 6484 6247 6034 6034 5820 [5536] 
16 6927 6758 6452 [6160] 6089 6033 [5828] 5054 
17 6983 6747 6502 6097 6062 6196 5856 [5385] 5750 
18 || 6969 6667 6524 6197 5962 [6027] 5829 5262 5511 
19 || 6890 [6701] | [6421] 6172 6013 6072 5778 5344 5199 
