BEE 
PEE an 
at 
tee 
: 
| H CURVES 
or 
~ MARNETIG DEULINATION, 
Observed. at The Observatery U 
i Curbridge NBowith a Gauss tnsirument at intervals oF minutes 
from Octobir 20401840 to October 2750" The empurtcal curve ts calculated by th 
Declination = 9.16 1 1515 su. (t— 1802) 2379 sin 2. (t-10-40 "98-0908 stn. 3/t—-O'Y": 
au which tis he time after 0 Gottingen Mean Time, 
formula. 
8)-O.034 sin 4 (t-ON2°I2) 
he Curve from Detwber 200 %to Octaber 214 0%%8 a tine thus 
2 Pry Rein, ay te 
That « . Wisma a 
- 4 = ag Bs 
23 “ 
FA Nee ait 
The meant curve 
The empirical cure 
Fas Oa 773 ll G7 nl 2" 23 jeon| | 
Theassjers Lith, Bester. 
1s , t 
= ’ % 
‘ m in 
iad — > cr 
CC | a - 
