ABSTRACTS FOR THE VERTICAL FORCE. 145 
TABLE XV.—Containing the Monthly Means of the Balance Magnetometer Readings, as Corrected in this 
Volume, for the Hours 20, 23, 2, and 5. 
: Month. H 23h, ‘ e Range from the 
a Four Hours. 
y 
: 1841. Mic. Diy. Mic. Diy. 
: July 744-6 46-5 
; de SSCP |e 8 Ie 
: August 715-8 17:3 
i 
‘ September 676-2 44.5 
October 655-2 70-2 
November 641-8 34-1 
1842. 
January 
February 
March 
April 
May 
June 
July 
August 
September 
October 
November 
December 
None of the months in 1841 are comparable with those of 1842; and only October and November in 1841 
"are comparable with each other. Those months for which two values of T (the time of the Balance needle’s vibra- 
_ tion in a vertical plane) are used, have the means of the readings corrected according to each value of T given 
_ separately. 
Another value of g having been obtained from the Daily Observations in 1843-4, has been applied, and the 
following Tables formed. 
MAG. AND MET. OBS. VOL. I. 20 
