44 W. A. Norton on the Variations of the Declination, &. 
conception of the entire action of the solar emanations if we ob- 
serve that the effect is the same that it would be if the sun were 
constantly from 60° to 75° to the west of its actual position, and 
_ the earth had no orbitual motion. 
_.. This view of the origin of the irregular perturbations of the 
directive force of the magnetic needle connects theoretically these 
S. 
| previous publications, that in the idea of ma- 
m the sun’s surface, according to a certain 
e explanation of the Zodiacal Light; also 
‘from the sun is probably the sub- 
hat it 
é 
stance of terrestrial Auroras ; 
in Cometary phenomena. 
Note.—The same effects which in the present discussior 
been referred to electric currents developed in the upper att 
here, would be produced by currents circulating at the earth’s 
surface in the opposite direction ; that is, the one set converging 
toward the,points of the surface which are exposed to the sui, 
and the othestrunning from west to east, and at the outset paral- 
lel to the ecliptic. But there are several objections to the ado 
can give rise to currents of positive electricity converging to t 
points on which the sun acts, and the tendency of any suppose 
electric force propagated from the sun would be to create diverg: 
ing instead of converging currents. Again if the sun has the 
tendency to develop in the crust of the earth currents runnin! 
the magnetic needle, when transferred to the contiguotis mole- 
cules of bodies conceived to be surrounded with electric atmos- 
pheres, appears to afford a sufficient basis for a satisfactory dy-_ 
namical theory of frictional and galvanic electricity, and of 
principle of magnetism in its various aspects. 
