ABSTRACTS FOR THE VERTICAL FORCE. 151 
TABLE XXI.—continued. 
Balance Magnetometer. 
Lowest. Highest. 
Gottingen Gottingen 
Mean Time. Reading. eas Game: Reading. 
1842. - . Mm. Mic. Diy. hm Mice. Div. Mie. Div. 
January 972-0 58 1038-1 66-1 
February 937-6 28 973-3 35-7 
March fe 574-9 i 4 991-2 416-3 
April 783-9 28 1024-4 240-5 
May 844-6 921-1 
June E 787-1 953-7 
July 825-2 896-6 
August : 764-9 854-8 
September 716-5 g 871-2 
October 772-8 g 856-3 
November 785-6 824-5 
December 760-6 E 807-0 
The range of the Term-Day Observations in 1841 is about 0-00516, in parts of the whole Vertical Force. 
d The greatest force occurs in October, being 0-00168 above the mean of the month ; the least occurs in August, 
- being 0:00348 below the mean of the month. 
In 1842, the range is about 0°00644, in parts of the whole Vertical Force. 
The greatest force occurs in April, being 0:00180 above the mean of the month; and the least in March, 
being 0:00514 below the mean of the month. 
TABLE XXII.—The greatest and least Readings of the Balance Magnetomer during Extra Observations for each 
: Month in which Extra Observations were made. 
Balance Magnetometer. 
L 5 ighest. 
Month. pebace ere: Range. 
Gottingen A Gottingen : 
Mean Time. Reading. Mean mine: Reading. 
1841. a he. mi 5. Mie. Div. dj i mn. 48s Mic. Div. Mie. Diy. 
August 20 22 57 30 789 20 22 47 30 793 4 
September 25 6 1 30 699 25 4 6 30 1150 451 
1842. 
May 25 3 26 0 890 16 5 23: 0 1166 276 
July 21148 O 160 2 O53) 10 1200 1040 
August 16 20 36 0 781 19 458 0 1229 448 
September 20 19 58 O 814 2 3 34 0 995 181 
October 17 458 0 821 17 540 O 871 50 
November 21 0 691 756 O 955 
December 0 7 4 0 964 
| The range of the observed portion of the disturbance September 1841, is 0:00685; the greatest force being 
—0:00526 above, and the least 0°00060 below, the mean of the month. 
B The range of the disturbances of 1842 is 001405. 
: The least force occurs in July, being 0°00919 below the mean of the month; the greatest occurs in: August, 
- being 0:00486 above the mean of the month, 
f The range of all the observations in 1841 is about 000982; the lowest occurring in the August term, being 
 0:00348 below the mean of the month, and the highest: on October 25, being 0:00634 above the mean of the month. 
’ The range of all the observations in 1842 is “that of the disturbances given above. 
