താൾ:CiXIV132a.pdf/433

വിക്കിഗ്രന്ഥശാല സംരംഭത്തിൽ നിന്ന്
ഈ താളിൽ തെറ്റുതിരുത്തൽ വായന നടന്നിരിക്കുന്നു

CXXI

or negatively electrified. The terms positive and negative are
adopted only for the sake of convenience. If the surplus of
one kind of electricity spreads over the whole of a body, we
call that body a conductor, if only that part of the body which
was exposed to friction is electrified, we call such a body a non
conductor. As the fluids of one kind repel each other and those
of different kinds attract each other, the electric fluids are expan
sive like gases; this expansion we call the electric tension or force.
At the edges and points of an electric body the electric fluid
accumulates and its density and tension increase to such a degree
as to overcome the atmospheric pressure.

Remark. We may say, the age in which we lived until now, was a
steam-age, but it seems, we have already entered an age, in which electri
city will be the prominent physical power. After Faraday discovered
the induced currents, it was in a threefold way, that practical use was
made of electricity. 1) For producing the electric light, which is even
cheaper now than the coal-gas light (not the glowing light, but the arch
ed light) and not dangerous. 2) For electrolysis, by which not only elec
trotypes but also metals may be won, 3) For transmission of force. Just
as motion is changed into electricity, also electricity may be transformed
into motion. When the question was raised, whether the force represent
ed by the Niagara-cataract might not be utilized by electricity for New
York, the physicist Siemensin Berlin was of opinion, that for conducting
this force all the copper available in this world would not be sufficient.
But Prof. Dr. Zech and others deny this, and in Munich they already
succeeded in transmitting the force of a river so miles distant by elec
tricity and utilizing it for putting in motion different machines. As the
stock of coal is gradually decreasing and as the forces of flowing water
are not yet profited as they ought to be, we may expect, that erelong,
at the bank of every torrent a dynamic machine will be placed to supply
large cities with light etc.

"https://ml.wikisource.org/w/index.php?title=താൾ:CiXIV132a.pdf/433&oldid=191313" എന്ന താളിൽനിന്ന് ശേഖരിച്ചത്