436 Miscellaneous Intelligence. 
of the most remarkable features of the magnetic system; and cannot _ 
with propriety be overlooked, as it too frequently has been, by those 
who would connect the phenomena of terrestrial magnetism generally, 
mediately or immediately with climatic circumstances, relations of land 
and sea, or other causes to which we are assuredly in no degree entitled 
to ascribe secular variation,—and who reason therefore as if the great 
magnetic phenomena of the earth were persistent, instead of being, as 
they are, subject to a continual and progressive change. It may confi- 
plied whereby the of physical theories propounded for their ex- 
planation might be examined are just beginning to profit by the 
collocation and stu the great body of facts which has been col- 
around the sun, and to its rotation around its own axis, have been ascer- 
tained to exist, and their numerical val pproximately determined 
in each of the three elements, the Declination, Inclination, and Mag- 
