t work.

One summer, policemen were pressed into the service. They were stationed
on all the roads leading out of the infected districts to examine every
vehicle that drove through, to see that none of the caterpillars escaped
into the surrounding country by clinging to the wheels or the body of the
wagon.

That year there were such myriads of these caterpillars, that they would
fall by hundreds on the vehicles as they drove under the trees.

The moth policemen were both necessary and useful.

The Commission starts in, this year, with several new inventions for
destroying both caterpillars and eggs, and hopes to make good progress.

Thus far Massachusetts has spent nearly $1,000,000 in her effort to rid
herself of the Gipsy moth.

GENIE H. ROSENFELD.

INVENTION AND DISCOVERY.

[Illustration]

Summer trips will be more easy to arrange and pack for, if we have such
space-saving inventions as the travelling or military hair-brush, as the
inventor calls it. It is a handleless brush, the back forming a box deep
enough to contain a comb, and provided with a sliding lid which pushes in
or out like the lid of a child's pencil-box.

[Illustration]

This invention comes from the ever-inventive West, and consists of a
penholder formed of tightly rolled paper which in some ingenious manner
holds the pen permanently in place.

At last we seem to have a mucilage brush that is going to answer every
requirement.

We have had them in plenty with the handles so arranged that the mucilage
would not get on one's fingers, and so that the neck of the bottle would
not get clogged. But so far every invention has fallen short in one very
important particular. The brush has always been left in the mucilage,
where it got hard and stiff and unusable for a time, or had to be lifted
out and put in a fresh compartment, where it again dries and hardens.

The new brush is so arranged that it does not touch the mucilage, but is
held above it by a spring in the handle. When the gum is to be used, the
top of the handle is pressed, and the brush is forced down into the bottle
until it meets the liquid.

The moment the finger is taken off the handle, the brush springs back into
place; and when taken out of the bottle it is found to be furnished with a
metal rim which prevents any of the liquid from touching the fingers.

[Illustration]

We have chronometers which can register time, and