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 
each Month in 1843, together with the Monthly Ranges of the Daily Means. 
Month. 
January 
February 
March 
April 
May 
June 
July 
Aiigust 
September 
October 
November 
December 
The Year 
Westerly Declination. 
Day. 
20 
24 
7 
6 
30 
14 
8 
22 
28 
3 
6 
6 
Jan. 20 
Above 
.Mean. 
3-34 
3-28 
3-50 
3-54 
2-11 
2- 95 
3- 23 
3-63 
311 
2-51 
2-99 
1-87 
6-50 
Day. 
12 
6 
29 
20 
6 
20 
24 
24 
21 
19 
30 
1 
Nov. 30 
Below 
Mean. 
•27 
•07 
•61 
•72 
•97 
•24 
•62 
•79 
•70 
•20 
■ 30 
• 11 
-53 
Horizontal Component. 
Day. 
16 
4 
22 
29 
29 
10 
24 
3 
18 
19 
24 
25 
Dec. 25 
Above 
Mean. 
0-01 
0614 
0628 
0528 
0453 
0952 
0596 
1176 
0689 
0637 
0518 
0741 
0465 
2048 
Day. 
23 
14 
16 
6 
26 
9 
5 
2 
Apr. 6 
Below 
Mean. 
0-00 
0423 
0511 
0542 
0814 
1391 
0491 
0801 
0803 
0527 
0543 
0734 
0519 
1776 
Vertical Component. 
Day. 
11 
24 
7 
5 
12 
17 
25 
22 
11 
17 
15 
2 
Jan. 11 
Above 
Mean. 
0-00 
0200 
0223 
0663 
0527 
0139 
0199 
0744 
0487 
0147 
0377 
0156 
0163 
1205 
Day. 
23 
28 
31 
25 
6 
22 
27 
9 
30 
7 
22 
25 
Dec. 25 
Below 
Mean. 
0-00 
0240 
0107 
0432 
0197 
0266 
0114 
0205 
0406 
0264 
0442 
0144 
0120 
0848 
Ranges. 
1 >eclina- 
Hor. 
Ver. 
tion. 
Comp. 
c. 
Lomp. 
0-00 
0-00 
5-61 
1037 
0440 
7-35 
1139 
0330 
6-11 
1070 
1095 
5-26 
1267 
0724 
4-08 
2343 
0405 
7-19 
1087 
0313 
6-85 
1977 
0949 
5-42 
1492 
0893 
4-81 
1164 
0411 
5-71 
1061 
0819 
5-29 
1475 
0300 
3-98 
0984 
0283 
1203 
3824 
2053 
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 2'*63 below the mean. 
The greatest deviation of a daily mean to the west of the mean for the month is 3'- 63, 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'-ll, 
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 7'' 35 ; 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 
defect of a daily mean from the monthly mean occurs May 8, being 0-001391. The greatest excess of a weeklv 
mean, as given Table VIII., above the mean for the year, occurs December 21 — 27, being 0-004500 ; an J 
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 0-000335 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 5 
— 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. 
