The difficulties attending the management of a physical laboratory are
much greater than those of a chemical one. The cause of this lies in the
fact that in the latter the apparatus is less complicated and the pieces
less varied. Any contrivance that will reduce the labor and worry
connected with the running of a laboratory is valuable.

A physical laboratory may be arranged in several ways. The apparatus may
be kept in a store room and such as is needed may be given to the
student each day and removed after the experiments are performed; or the
apparatus for each experiment or system of experiments may be kept in a
fixed place in the laboratory ready for assembling; for certain
experiments the apparatus may be kept in a fixed place in the laboratory
and permanently arranged for service.

Each student may have his own desk and apparatus or he may be required
to pass from desk to desk. The latter method is preferable.

When a store room is used the services of a man are required to
distribute and afterward to collect. If the apparatus is permanently
distributed, a large room is necessary, but the labor of collecting and
distributing is done away with.

There are certain general experiments intended to show the use of
measuring instruments which all students must perform. To illustrate the
use of the indicator I have selected an elementary class, although the
instrument is equally applicable to all classes of experiments.

Having selected a suitable room, tables may be placed against the walls
between the windows and at other convenient places. Shallow closets are