232 Dr. Hare on the Theories of Electrical Phenomena. 
6. But if the flow of one fluid, with the enormous velocity in- 
ferred, be difficult to conceive, still more must it be incomprehen- 
sible that two fluids can rush with similar celerity, from each sur- 
face of the jar, in opposite directions, through the narrow chan- 
nel afforded by a wire ; especially as they are alledged to exercise 
an intense affinity; so that it is only by a series of decomposi- 
tions and recompositions that they can pass each other. ‘That 
agreeably to the theory of Dufay, equivalent portions of the res- 
inous and vitreous fluids must exchange places during an electrical 
discharge, will appear evident from the following considerations: 
7. One surface being redundant with vitreous and deficient 
commensurately of resinous electricity, and the other redundant 
with the resinous and deficient of the vitreous fiuid, it is inevi- 
table that to restore the equilibrium, there must be a simultane- 
ous transfer of each redundancy to the surface wherein there is a 
deficiency of it to be supplied. If after decomposing a large portion 
of the neutral compound previously existing on the surfaces of 
the jar, and transferring the ingredients severally in opposite di- 
rections, so as to cause each to exist in excess upon the surface 
assigned to it, were the redundancies, thus originated, to be neu- 
tralized 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 ad- 
duced of the existence of any tertium quid, arising from the 
union of the supposed electricities, founded on any property dis- 
played 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 disappearance of its 
alledged ingredients. 
9. But however plausibly the discharges consequent to making 
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, accord- 
ing to one theory nor the other, is it possible to account satisfac- 
torily for the stationary magnetism with which steel may be en- 
dowed, nor the transitory magnetism, or dynamic power of in- 
duction, acquired by wires transmitting galvanic discharges. 
10. For the most plausible effort which has been made for the 
purpose of reconciling the phenomena of 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 Ampére. 
11. According to the hypothesis advanced by this eminent phi- 
losopher, the difference between a magnetized and an electrified 
y* is not attributable to any diversity in the imponderable 
* See Compendium—Electro-magnetism, paragraph 722. 
