longitudinal shaft, drives two cross shafts to which bevel wheels are
attached. By this means the chamber is lowered and raised. The screw
rods are so powerful that they sustain the entire weight of the lock
chamber, and the pitch of the thread is such that spontaneous sliding
or slipping is impossible, the chamber being, therefore, kept
constantly in the desired position.

It is interesting to note that the hollow space in the screw rods is
heated by steam during winter, thus preventing the formation of ice in
the machinery.

During the eighties, locks for ships of 400 tons capacity were
erected in England and France, at Anderton, Les Fontinettes and La
Louvière. The lock at Henrichenburg, however, exceeds all its
predecessors, not only in size, but also in security. At all events,
the structure is a worthy memorial of the energy and genius of
German engineers.--Illustrirte Zeitung.

* * * * *

Paper hanging by machine is the latest achievement, according to a
German contemporary, says The Engineer. The arrangement used for this
purpose is provided with a rod upon which the roll of paper is placed.
A paste receptacle with a brushing arrangement is attached in such a
manner that the paste is applied automatically on the back of the
paper. The end of the wall paper is fixed at the bottom of the wall
and the implement rises on the wall and only needs to be set by one
workman. While the wall paper unrolls and, provided with paste, is
held against the wall, an elastic roller follows on the outside, which
presses it firmly to the wall. When the wall paper has reached the