THE FALKE TYPE TORPEDO BOAT.
THE GERMAN NAVY--THE NEW GUNBOAT EBER.
NEW BRITISH TORPEDO EXPERIMENTS.
AN ENGLISH CAR COUPLING.
MAGAZINE RIFLES.
PRESERVATIVE LIQUID. For a few weeks' preservation of organic objects in their
original form, dimensions, and color, Prof. Grawitz recommends a
mixture composed of 2½ ounces of chloride of sodium,
2¾ drachms of saltpeter, and 1 pint of water, to which is to
be added 3 per cent. of boric acid.--Annales des Travaux
Publics.
KENT'S TORSION BALANCE.
LINK BELTING.
A NEW
PROCESS OF CASTING IRON AND OTHER METALS
RECENT PROGRESS IN GAS ENGINEERING.
To varnish chromos, take equal quantities of linseed oil and oil
of turpentine; thicken by exposure to the sun and air until it
becomes resinous and half evaporated; then add a portion of melted
beeswax. Varnishing pictures should always be performed in fair
weather, and out of any current of cold or damp air.
THE NEW BRITISH COINAGE AND JUBILEE MEDAL.
BRICKS AND BRICKWORK.
A fireproof whitewash can be readily made by adding one part
silicate of soda (or potash) to every five parts of whitewash. The
addition of a solution of alum to whitewash is recommended as a
means to prevent the rubbing off of the wash. A coating of a good
glue size made by dissolving half a pound of glue in a gallon of
water is employed when the wall is to be papered.
PHENOMENA OF ALTERNATING CURRENTS.
PHOTOGRAPHIC STUDY OF STELLAR SPECTRA, HARVARD COLLEGE
OBSERVATORY.
THE WINNER OF THE DERBY.
THE FALLS OF GAIRSOPPA.
SPONGES.
HERBET'S TEPID DOUCHE.
HOW TO MAKE A STAR FINDER.
The best mode of finding or tracing trichinae in pork by means
of a microscope is the following: Cut a very thin longitudinal
slice of the muscle by means of a very sharp knife or razor. Press
it between two glass slips, and examine by transmitted light, The
coiled trichinae may be readily distinguished from the muscle
fiber.
PATENTS.
