150 ABSTRACTS FOR THE VERTICAL FORCE. 
TABLE XX.—continued. 
Balance Magnetometer. 
Lowest. Highest. 
Range. 
Gottingen 
: Gottingen E 
Mean Time. Reading. 8 Reading. 
Mean Time. 
1842. a Mic. Div. ey Ee Mic. Diy. Mic. Div. 
January 31 20 955-8 18 5 1038-2 82-4 
February 11 20 852-3 17 1138-6 286-3 
March 235 879-7 28 1003-2 123-5 
April 14 609-3 15 1097-4 488-1 
May 28 . 16 1087-4 214-3 
June 24 930-6 85-5 
July 4 1140-8 447-1 
August 19 28. 441-7 
September 2 130-0 
October 117-2 
November 205-1 
December 73:3 
The range of the Daily Observations in 1841, in parts of the whole Vertical Force, is 0:00820 ; the greatest — 
and least occur in October, and are 0:00634 above, and 0:00186 below, the mean of the month. 
The range of the Daily Observations in 1842 is 0 00894; the greatest force being in August 0:00485 above 
the mean of the month, and the least occurs in April, being 0-00409 below the mean of the month, 
TABLE XXI.—The greatest and least Readings of the Balance Magnetometer for each of the Term-Days. 
Balance Magnetometer. 
Lowest. Highest. 
Range. 
Gottingen 
Mean Time. 
Gottingen 
EE: Mean Time. 
Reading. 
1841. a h m Mie. Div. a h m Mic. Diy. Mice. Diy. 
July 21 16 47% 761-1 21 10 17% 862-9 101-8 
August 12 574 541-1 28 897-5 356-4 
September 10 74 671-7 23 9 573 743-9 72-2 
October 19 274 514-9 4 174 822-7 307-8 
November 1 574 646-5 11 574 678-0 31-5 
December 18 573 620-3 10 274 716-6 96-3 
