144 Miscellaneous Intelligence. 
of the temperature at different seasons of the year, exhibited by means 
of a numerical index analogous to the probable error of the arithmeti- 
v, 379).—In 
this communication the author has arranged, in tables, the disturbances 
of the magnetic declination at St. Helena and the Cape of 
for the purpose of exhibiting the systematic laws by which those phe- 
nomena are regulated, which were long described as irregular varia- 
tions, because they were of occasional and apparently uncertain oc- 
ren 
The frequency of the disturbances, and their amount, whether viewed 
t eral abnorma 
‘ 
