of the cylinders, while that on the high is adjustable; of course, in this
case, the position of the quadrants must be only changed for reversing. In
arranging the independent cut-off on the Joy gear, it is only necessary to
increase the length of the vibrating link beyond the point of attachment
for the main valve spindle connection to obtain a point from which motion
may be taken to actuate the cut-off valve; even then the cost of the Joy
gear for both cylinders is but little more than for a single set of link
gear.

This arrangement gives an absolutely perfect distribution of steam for
compounding, also equalizes the power developed by both cylinders, and is
far more simple and inexpensive than any other gear in existence.

* * * * *




THE STEAM BELL.


[Illustration: FIG. 1.]

[Illustration: FIG. 2.]

The secondary railways in rural districts in Austria having no gates or
bars at the level crossings, or guards at such points, but being open like
tramways, special precautions are required to avoid accidents, and the
public has to be warned of the approach of the train from a sufficient
distance. This is done by ringing bells preferably to sounding whistles,