zr 5 At 
Dr. Hare on the Theories of Electrical Phenomena. 47 
globe of glass, as a solid globe of metal. No sensible change 
appears to be produced in the ponderable conducting superficies 
by this ame a electrification of masses; and of 
course no magne 
62. en Pathe image, of which the scalp has been abun- 
dantly furnished with long hair, is electrified, the hairy filaments 
be ee ahr and move apart, as if actuated by a repulsive 
so when iron filings are so managed as to obey the in- 
hese of | the poles of a powerful magnet (51), they arrange 
themselves in a manner resembling that of the electrified hair. 
here is, moreover, this additional analogy, that there is an at- 
traction between two portions of hair differently electrified, like 
that which arises between filings differently magnetized. Yet 
the properties of the electrified hair and magnetized filings are, 
in some respects, utterly dissimilar. A conducting communica- 
tion between differently electrified portions of hair would entirely 
neutralize the respective electrical states ; so that all the electri- 
cal phenomena displayed by them would cease. Yet 7 a 
communication made between the poles, exciting ‘the filings, b 
any non-magnetic conductor, does not in the slightest ies 
lessen their polar affections and consequent power of reciprocal 
influence. Upon the electrified hair, the proximity or the con- 
tact of a steel magnet has no more effect than would result under 
like circumstances from any other metallic mass similarly em- 
ployed; but by the approximation, and still more, the contact, of 
such a magnet, the affection of the filings may be enhanced, less- 
ened, or nullified, according to the mode of its employment. In 
the case of the hair, the affection is superficial, and the requisite 
charging power must be in proportion to the extent of surface. 
n the case of the magnetized ferruginous particles, it is the mass 
which is affected, and, ceteris paribus, the more metal, the 
greater the capacity for magnetic power. In the instance of the 
electrified hair, as in every other of frictional excitement, the 
electrical power resides in imponderable ethereo-electric atmos- 
pheres which adhere superficially to the masses, being liable to be 
unequally distributed upon them in opposite states of polarity, 
consequent to a superficial polarization of the exciting or excited 
ponderable masses; but in the instance of bodies permanently 
magnetic, or those rendered transiently magnetic by galvanic in- — 
fluence, the ethereo-electric matter and the ponderable atoms are 
inferred to be in a state of combination, forming ethereo-ponder- 
able atoms; so that both may become parties to the movements 
and affections of which the positive and negative waves consist. 
hus an explanation is afforded of “the hitherto ere 
ous diversity of the gee of a gold leaf eloctroaaae and 
vanoscopes, although both are to a wonderful degree sensitive ; 
the latter to the most feeble po nae discharge, the former to the 
