The natural
repulsion between its like electrified particles causes the shower to
issue in spray. As the paper moves over the pulleys a delicate hair
line is marked, straight when the siphon is stationary, but curved when
the siphon is pulled from side to side by the oscillations of the signal
coil.
It is to the mouse-mill that me must look both for the electricity which
is used to electrify the ink and for the motive power which drives the
paper. This unique and interesting little motor owes its somewhat
epigrammatic title to the resemblance of the drum to one of those
sparred wheels turned by white mice, and to the amusing fact of its
capacity for performing work having been originally computed in terms of
a 'mouse-power.' The mill is turned by a stream of electricity flowing
from the battery above described, and is, in fact, an electro-magnetic
engine worked by the current.
The alphabet of signals employed is the 'Morse code,' so generally in
vogue throughout the world. In the Morse code the letters of the
alphabet are represented by combinations of two distinct elementary
signals, technically called 'dots' and 'dashes,' from the fact that the
Morse recorder actually marks the message in long and short lines, or
dots and dashes.
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