of either silk or cotton insulation of equal thickness
The dielectric strength of enamel insulation is much greater than that
of either silk or cotton insulation of equal thickness. This is a
distinct advantage and frequently a combination of the two kinds of
insulation results in a superior wire. If wire insulated with enamel
is given a single wrapping of […]

number of stations to be placed on a line
Neither of these considerations, however, should determine the maximum
number of stations to be placed on a line. The proper limit as to the
number of stations is not the number that can be rung by a single
generator, or the number with which it is possible to transmit speech
properly, […]

In Fig. 289 is shown the cord circuit sometimes used by the L.M.
Ericsson Telephone Manufacturing Company. A high-wound relay is
normally placed across the cord and this, besides having a
high-resistance and impedance winding has a low-resistance locking
winding so arranged that when the relay pulls up its armature it will
close a local circuit including this locking winding […]

Visible Signals. _Electromagnetic Signal._ Practical visual signals
are of two general kinds: electromagnetic devices for moving a target
or pointer, and incandescent lamps. The earliest and most widely used
visible signal in telephone practice was the annunciator, having a
shutter adapted to fall when the magnet is energized. Fig. 22 is such
a signal. Shutter _1_ is held by the […]

business safely through half a dozen years
This oil-filled type of cable carried the telephone
business safely through half a dozen years.
But it was not the final type. It was preliminary
only, the best that could be made at that
time. Not one is in use to-day. In 1888 Theodore
Vail set on foot a second series of experiments,
to see […]

I recall
The last copyright extension in the United States was in 1975 as
I recall. If we extend the copyright 20 years every 20 years we
will destroy the very concept of Public Domain, as we have known
it since the beginning of copyright.

springiness and toughness and helps to prevent corrosion
Nickel, with which is often combined chromium, increases the strength,
springiness and toughness and helps to prevent corrosion.

parts, except the polarized ringer and the associated condenser, in
the desk stand itself
The Kellogg Switchboard and Supply Company is one which places all the
parts, except the polarized ringer and the associated condenser, in
the desk stand itself. In Fig. 156 is shown a bottom view of the desk
stand with the bottom plate removed. In the upper […]

York, Philadelphia and New York, Milwaukee and Chicago
Underground long-distance lines now join or are joining Boston and New
York, Philadelphia and New York, Milwaukee and Chicago. England and
France are connected by a loaded submarine cable. There is no
theoretical reason why Europe and America should not speak to each
other.

not even two phases of the same truth
Science and religion are not two separate departments, they are
not even two phases of the same truth. Science has a broader realm
in the unseen than in the seen, in the source of power than in the
outcomes of power, in the sublime laws of spirit than in the laws
of […]