ical compound condensing engine of the same power, running at 180
revolutions. The dynamo generator is a four-pole 600 volt direct
current machine, series wound, and may be distinguished in the
engraving next to the switch board; while the motor receiver
connected to it, and erected in another portion of the Swiss section,
is of exactly the same size and type. The field, which is hexagonal in
shape, is cast in two pieces, bolted together horizontally, the
cross-sectional area of iron being 170 square inches. The armature is
cylindrical, and built up of flat rings stamped out of soft sheet
iron, eight notches in the same being provided to fit over the arms of
the spider keyed to the shaft. The spider is in halves, which are
bolted together longitudinally after the rings are in position. It is
Gramme wound, and measures over the winding 7 in. radial depth, 37 in.
outside diameter, and 22 in. in length. The current is collected by
four brushes. The fitting and mechanical build of the dynamos leaves
nothing to be desired. All the working parts of the dynamos and
engines are turned up to gauge and template, so as to be
interchangeable. As an instance of this, the armature of the generator
was built in the works, while the field magnets were being erected in
the exhibition, and, on arrival, fitted in position perfectly, and ran
at once without trouble.

The energy taken off on the motor shaft is close on 200 horse power,
but varies according to the machines at work; the speed of the motor
does not, however, vary more than 3 per cent., and the brushes need no
adjustment. About 6 ft. of shafting is coupled on in line with the
motor shaft, and an extra plummer block fixed at the end. This
shafting carries at its extremity an additional 2 ft. pulley, the
power being delivered by belting from these pulleys to two large
pulleys on the main shaft.

The machines run by this transmission consist of the looms of Rieter &
Co., of Winterthur; the large flour mill and lift of A. Millot & Co.;
the flour milling machinery of Frederick Wegmann & Co., of Zurich; the
brick and tile making machines of the Rorschach foundries; and the
looms of Messrs. Houget & Teston, of Verviers, in the Belgian section.
A 15 horse power two-pole Oerlikon dynamo is also run by a belt from
the main shaft, and generates power to drive a motor of similar type
in the Swiss section of the upper gallery. This runs a length of
countershafting supplying power to three