li INTRODUCTION TO THE MAKERSTOUN OBSERVATIONS, 1843. 
73. With the exception of the results of the values of voy where the com- 
parisons have been of the readings on one day with those on the next following, the 
results are remarkably consistent for all intervals, and in no case does the result 
amount to that by temperature experiments ; as an evidence, however, that the first 
results differ from the others only accidentally, the following is given, which con- 
tains all the comparisons made of the readings on one day with those on the day 
immediately following, with the exception already mentioned for the balance magnet, 
No. 68 :— 
TABLE 21.—Results of Comparisons with One Day’s Interval. 
Period compared. No.of » DAE 
comparisons. 
1844. ° 
May 9—May 24 11 884-8 
May 29—June 28 26 1262-8 
July 17—July 31 11 604-5 
Sept. 2—Sept. 25 19 834.0 
Nov. 26—Dec. 13 15 842-9 
4329-0 
All the Periods 
In this case it will also be remarked, that no partial result is as great as that 
from the temperature experiments. 
74. As a farther evidence that the result obtained for this instrument is also 
independent of any cause, such as has been already suggested for the balance needle, 
the following Table contains the results of the comparisons on the same days as 
those already given for the balance needle, and on which the differences of tempe- 
rature depend on artificial heat :— 
TABLE 22.—Results of Comparisons when the Differences of Temperature depend 
on Artificial Causes. 
Day of No. of 5 
ene Days compared with compa-| SA(T) | ZA(é) | SA Ce ae pee 
parison. risons. 7 dl 
1843. 1843. ° ° Se. Div. Se. Div. Se. Div. 
Jan. 23 | Jan. 18—21, 2428 +63:4 | 130-2 +36:3 | +0-29 1-61 
Mar. 13 | Mar. 16—21, — 21-2 28-1 -—14-6 — 0-52 2:42 
Mar. 14} Mar. 16—21, — 27:5 26-1 -— 80 | —0-31 2-21 
Mar. 15 | Mar. 16—21, 
Mar. 22} Mar. 16—21, 2498 
Mar. 23 | Mar. 16—21, 24—28 
Oct. 19°} Oct. 14—18) 20—95 
Noy. 25 | Nov. 21—24, 27—Dee. 1 
Dec. 21 | Dec. 16—20, 22—97 
— 29-0 28-1 +°4:8 | 4+0-17 1-73 
+79-1 62:4 +52:0 | +0-83 1-07 
455-7 79:5 +23-3 | +0-29 1-71 
—41-2 99-6 +32-8 | +0-33 1:57 
— 84-5 97-0 +29-9 | +0-31 1-59 
—49:9 83-8 + 1-4 | +0-02 1-88 
oon nuournno 
