258 ABSTRACTS OF THE MAKERSTOUN OBSERVATIONS, 1843. 
TABLE XXXII.—Differences of the greatest and least Daily Means of Magnetic Declination, and 
of the Horizontal and Vertical Components of Magnetic Force, from the Monthly Means for p 
each Month in 1843, together with the Monthly Ranges of the Daily Means. 
Westerly Declination. Horizontal Component. Vertical Component. 
Ranges, 
Above : Above 
DEYN \eant é Mean. 
, Ab Jeclina- 
Day. Day. Moa 7 mea Hor. 
0-09 0-00 
January : 3-34 2 : 0614 0200 
February 3-28 : 0628 0223 
March 3: “6 0528 0663 
April : 72 0453 0527 
May . : 0952 0139 
June . : 0596 0199 
July 3:2: 24 | 3- 1176 0744 
August Z “62 : 0689 ‘ 0487 
September : : 0637 0147 
October 3 | 2: : 0518 0377 
November : : 0741 0156 
December 5 | 1. : 0465 0163 
The Year | Jan, 20 '6- a Dee. 25 | 2048 536 : 1205 | Dec. 25 
The last line in the above Table contains the difference of the greatest and least daily means from the 
mean for the year. 
Westerly Declination.—In opposition to the result obtained for the single observations, Table XXXI., the 
daily means deviate farther to the west of the mean than to the east of it. 
The mean of the greatest daily means in each month is 3’-00 above the mean. 
The mean of the least daily means in each month is 263 below the mean. 
The greatest deviation of a daily mean to the west of the mean for the month is 363, occurring on 
August 22; the greatest deviation of a daily mean to the east of the monthly mean occurs on June 24, 
being 4-24. 
“The greatest deviation of a weekly mean, as given Table I., to the west of the mean for the year, is 4-11, 
occurring January 19—25 ; the greatest: deviation of a weekly mean to the east of the mean for the year occurs 
December 21—27, being 4’-30. 
The greatest range of the daily means for any month is that for February, being 735; the least is that 
for December, being 3°98, The whole range of the daily means for the year is 12’-03. 
Horizontal Component.—The mean of the greatest daily means in each month is 0:000666 above the 
monthly means, the whole horizontal component being unity ; the mean of the least daily means in each month 
is 0:000675 below the monthly means. 
The greatest excess of a daily mean above the monthly mean is 0:001176, occurring July 24 ; the greatest ig 
defect of a daily mean from the monthly mean oceurs May 8, being 0:001391. The greatest excess of a weekly 
mean, as given Table VIII., above the mean for the year, occurs December 21—27, being 0:004500 ; and 
the greatest defect of a weekly mean from the mean for the year occurs April 6—12, being 0°001304, 
The greatest range of the daily means for any month is that for May, being 0-002343 ; the least is that 
for December, being 0:000984. The range of the daily means for the whole year is 0:003824. 
Vertical Component.—The mean of the greatest daily means in each month is 0000335 above the monthly 
means, the whole vertical component being unity. The mean of the least daily means in each month is 
0-000245 below the monthly means. 
The greatest excess of a daily mean above a monthly mean is that for July 25, being 0-000744; the 
greatest defect of a daily mean from a monthly mean is that for March 31, being 0:000432 below the mean 
for the month. 
The greatest excess of a weekly mean, as given Table XV., above the mean for the year, occurs January 4 
—11, being 0:001056 ; the greatest defect of a weekly mean from the mean for the year occurs December 21 
—27, being 0:000792. 
The greatest range of the daily means for any month is that for March, being 0:001095 ; the least is that 
for December, being 0:000283. The whole range of the daily means for the year is 0:002053. 
