the desk of the user or
on the wall within easy reach of his chair. Connections are made
between the apparatus in the desk stand proper and the battery,
generator, and bell by means of flexible conducting cords, these
carrying a plurality of conductors, as required by the particular
circuit of the telephone in question. Such a complete magneto
desk-telephone set is shown in Fig. 145, this being one of the types
manufactured by the Stromberg-Carlson Manufacturing Company.

[Illustration: Fig. 144. Desk Stand]

A great variety of arrangements of the various parts of magneto
desk-telephone apparatus is employed in practice. Sometimes, as shown
in Fig. 145, the magneto bell box is equipped with binding posts for
terminating all of the conductors in the cord, the line wires also
running to some of these binding posts.

In the magneto-telephone set illustrated the box is made large enough
to accommodate only the generator and call bell, and the batteries are
mounted elsewhere, as in a drawer of the desk, while in other cases
there is no other equipment but that shown in the cut, the batteries
being mounted within the magneto bell box itself. In still other
cases, the polarized bell is contained in one box, the generator in
another, the batteries in the drawer of the desk, the induction coil
being mounted either in the base of the desk stand, in the bell box,
or in the generator box. In such cases all of the circuits of the
various scattered parts are wired to a terminal strip, located at some
convenient point, this strip containing terminals for all the wires
leading from the various parts and for the line wires themselves. By
combining the various wires on the terminals of this terminal strip,
the complete circuits of the telephone are built up. In still other
cases the induction coil is mounted on the terminal strip and separate
wires or sets of wires are run to the polarized bell and generator, to
the desk stand itself, and to the batteries. These various
arrangements are subject largely to the desire or personal ideas of
the manufacturer or user. All of them work on the same principle so
far as the operation of the talking and signaling circuits is
concerned.

[Illustration: Fig. 145. Magneto Desk Set]

Circuits of Magneto-Telephone Sets. Magneto telephones, whether of
the wall or desk type, may be divided into two general classes, series
and bridging, according to whether the magnet of the bell is included
in ser