46 1 Dr. R. Hare's Objections to the Theories severally of 



viously existing on the surfaces of the jar, and transferring 

 the ingredients severally in opposite directions so as to cause 

 each to exist in excess upon the surface assigned to it, it were 

 necessary that the redundancies thus originated should be 

 neutralized by meeting in the discharging rod, neither surface 

 could recover its quota of the electrical ingredient of which it 

 must have been deprived agreeably to the premises. 



8. This calls to mind the fact, that no evidence has been 

 adduced of the existence of any tertium quid, arising from the 

 union of the supposed electricities, founded on any property 

 displayed by their resulting combination in the neutral state. 

 It must, if it exist, constitute an anomalous matter, destitute 

 of all properties, and of the existence of which we have no 

 evidence, besides that founded on the appearance and dis- 

 appearance of its alleged ingredients. 



9. But however plausibly the discharges consequent to 

 makinsr a conducting communication from one electrified mass 

 or surface to another mass or surface in an opposite state, 

 may be ascribed to accumulations either of one or of two 

 fluids; neither, according to one theory nor the other, is it 

 possible to account satisfactorily for the stationary magnetism 

 with which steel may be endowed, nor the transitory magnet- 

 ism or dynamic power of induction acquired by wires trans- 

 mitting galvanic discharges. 



10. For the most plausible effort which has been made for 

 thepurpose of reconciling the phaenomenaof electro-magnetism 

 with the theory of two fluids, or with that of one fluid, so far 

 as these theories are convertible, we are indebted to Ampere. 



11. According to the hypothesis advanced by this eminent 

 philosopher, the difference between a magnetized and an 

 electrified body is not attributable to any diversity in the 

 imponderable matter to which their properties are respectively 

 due, but to a difference in the actual state or distribution of 

 that matter. Statical polarity is the consequence of the un- 

 ■equal distribution of the two electric fluids whose existence 

 he assumes ; while magnetical polarity is the consequence 

 merely of the motion of those fluids, 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 magnet; so 

 that in a straight magnet the planes of the orbits must be 

 parallel to each other*. 



12. The aggregate effect of all the minute vortices of the 

 electrical fluids, in any one plane, bounded by the lateral 



* The words gyration, vortex and whirl, are considered as synonymous, 

 and used indifferently to avoid monotony. 



