dered to the stationary part and the other end to the movable part
of the hinge. In other forms of wall set the wires to the bell and the
transmitter lead directly from the stationary portion of the cabinet
to the back of the door, the wires being left long enough to have
sufficient flexibility to allow the door to be opened and closed
without injuring the wires.

At the upper portion of the box there is mounted the hook switch, this
being, in this case, of the short lever type. The lever of the hook
projects through the side of the box so as to make the hook available
as a support for the receiver. Immediately at the right of the hook
switch is mounted the induction coil, and immediately below this the
generator, its crank handle projecting through the right-hand side of
the box so as to be available for use there. The generator is usually
mounted on a transverse shelf across the middle of the cabinet, this
shelf serving to form a compartment below it in which the dry battery
of two or three cells is placed.

The wall telephone-set cabinets have assumed a multitude of forms.
When wet cells rather than dry cells were ordinarily employed, as was
the case up to about the year 1895, the magneto generator, polarized
bell, and hook switch were usually mounted in a rectangular box placed
at the top of a long backboard. Immediately below this on the
backboard was mounted the transmitter arm, and sometimes the base of
this included the induction coil. Below this was the battery box, this
being a large affair usually adapted to accommodate two and sometimes
three ordinary LeClanche cells side by side.

The dry cell has almost completely replaced the wet cell in this
country, and as a result, the general type of wall set as shown in
Figs. 142 and 143, has gradually replaced the old wet-cell type, which
was more cumbrous and unsightly. It is usual on wall sets to provide
some sort of a shelf, as indicated in Fig. 142, for the convenience of
the user in making notes and memoranda.

_Desk._ In the magneto desk-telephone sets, the so-called desk stand,
containing the transmitter, the receiver, and the hook switch, with
the standard upon which they are mounted, is shown in Fig. 144. This
desk stand evidently does not comprise the complete equipment for a
magneto desk-telephone set, since the generator, polarized bell, and
battery are lacking. The generator and bell are usually mounted
together in a box, either on the under side of