used in the frame. For this reason the system has been given the form of
a hexagonal prism, whose faces are formed of flat electro-magnets, A, A,
xxx, constituting the inductors.

The internal angles of this prism are filled by polar expansions, P, P,
xxx, alternately north and south, that thus form in the interior of the
apparatus an inscribed cylinder designed to receive the armature. This
latter belongs to the kinds that are wound upon a cylinder in which the
wire is external thereto.

The conductors are placed upon the iron drum longitudinally and parallel
with its axis. But instead of being connected with each other at the
posterier end of the armature, as in the Siemens system, they are
connected according to chords that correspond to a fourth, a sixth,
or any equal fraction whatever of the circumference. Fig. 4 gives a
perspective view of the cylinder, upon which the conductors 1, 2, 3,
4, and so on, are placed according to generatrices. The armature is
supposed to be divided into six parts, each conductor passing over the
bases of the drum through a chord equal to the radius, that is to say,
corresponding to a sixth of the circumference.

Three conductors are all connected together in such a way as to form
but a single circuit closed upon itself. Conductor 1, for example, is
connected with No. 6 in such a way that the end issuing from 1 becomes
the end that enters No. 6. Conductor No. 3 is connected in the same way
with No. 8, and so on, up to the last conductor, which is connected in
its turn with the end that enters the first.

As the figure shows, the conductor before passing from 3 to 8, for
example, returns several times upon itself in following 6 and 3, and the