484 MR JOHN ALLAN BROUN ON THE BIFILAR MAGNETOMETER, 
The final results are, 
1843. q’ = 2°25 sc. div.; probable error = 0-11 sc. div. 
ZAt 234-94 
ey = i z = 0-15 

1845. gq’ = a eT by | is =018 ,, 

All, 
, ZAR 1410-00 
ae TAt 649:50 2A ” 7 0:09 re 
whence, 
[q]=  0:000812 
In 1843 I found by water experiments, 
gr 0:000347. 
Therefore, 
35. SincaporE, 1842-45.* The changes of daily mean temperature by the 
bifilar thermometer were so small, that differences for the Ist, 2d, and 3d suc- 
ceeding days were taken for the temperature coefficient. The following table 
contains the sums of all the differences taken three times for each of the years 
1842, 1843, 1844, and 1845. 
; 198. k= 00001946. 
TABLE XIII.—Sums or DIFFERENCES OF BrFILAR Daity Means. SINGAPORE, 1842-45. 
Month. 
—— - _—— 
January, . . July, . 
February, . August, 

March; vrei September, 
April. 9. os October, . 
May, eae. November, 
Jue, Pale wee December, 



The values of 

,. 2AR : 
Boh ea for the different years are :— 
1842. q’ ee = 0°68 se. div.; probable error = 0-17 sc. div. 
1843, ¢ =e = 064 »  CsOl4 y 
pe AIMS 
1844. qI= “5387-2 = 0°89 Yt) 9 = OslD » 
* Observations in manuscript and printed, but not published. 

