Dr. Hare on the Theories of Electrical Phenomena. 233 
matter to which their properties are respectively due, but to a dif- 
ference in the actual state or distribution of that matter. Statical 
which, in magnets, are supposed to gyrate in opposite directions 
about each particle of the mass. These gyrations are conceived 
to take place only in planes at right angles to the axis of the mag- 
net; so that, in a straight magnet, the planes of the orbits must 
be parallel to each other.* 
he aggregate effect of all the minute vortices of the elec- 
trical fluids, in any one plane, bounded by the lateral surfaces of 
the magnet, is equivalent externally to one vortex, since, in either 
those of the wire on one side more than on the other: also the 
Wire, if moveable, will tend so to arrange itself as to produce the 
same result, which can arrive only when the needle is at right an- 
gles to the wire, and its sides consequently equidistant therefrom. 
13. Electric currents will produce magnetic vortices, and, re- 
Ciprocally, magnetic vortices will produce electric currents. Hence 
the magnetism imparted to iron by galvanized spirals, and the Fa- 
Tadian currents produced by magnetized iron within spirals not 
galvanized. 
14. Ampére’s theory has, in a high degree, the usual fault of 
Substitutiug one mystery for another; but, on the other hand, it 
has, in an equally high extent, the only merit to which any gd 
can make an indisputable claim: I mean, that of associating facts 
S80 as to make them more easy to comprehend and to remember, 
enabling us, by analogy, to foresee results, and thus affording a 
clue in our investigations. Evidently, the author of this theory 
Was guided by it, in his highly interesting an instructive contri- 
vances; and Professor Henry ascribes his success 1n improving 
©The words gyration, vortex and whirl, are considered as synonymous, and 
‘used indi id monotony. ; : : 
seinen s cimeeakienoieads when it is made the medium of the discharge 
from a galvanic battery. 
