THE TREATMENT OF GLAUCOMA.

As this disease is so fatal to vision, any remedy that may be
suggested to diminish the frequency of its termination in blindness
cannot fail to be read of with interest. M. Nicati, in the _Revue
generate de clinique et de therapeutique_, has had marked success in
the treatment of glaucoma by drainage of the posterior chamber, either
by sclerotomy or by sclero-iritomy, as the conditions of the
individual case may require.--_N.Y. Med. Jour._

* * * * *




A TWIN SCREW LAUNCH RUN BY A COMPOUND ENGINE.


[Illustration: TWIN SCREW STEAM LAUNCH GEMINI.]

The launch shown in our illustration was built in New Westminster,
British Columbia, Canada. She is 42 ft. keel and 7 ft. beam, and has 4
ft. depth of hold. She has an improved Clarke compound engine, also
shown in an accompanying illustration, with a high pressure piston
four inches in diameter, and a low pressure piston eight inches in
diameter, the stroke being six inches, and the engine driving two
twenty-six inch screws. With 130 pounds of steam, and making 275
revolutions per minute, the launch attains a speed of nine miles per
hour, thus fully demonstrating the adaptability of this engine to the
successful working of twin screws.