THE RETIRO VIADUCT.
SEA-GOING TORPEDO BOATS.
FIRING TRIAL OF THE 110½ TON B.L. ELSWICK GUN.
GAS ENGINE FOR USE ON RAILROADS.
WESTERN NORTH CAROLINA LOCATION OVER THE BLUE RIDGE.
NEW GASHOLDER AT ERDBERG.
A new bleaching compound has been discovered, consisting of
three parts by measure of mustard-seed oil, four of melted
paraffin, three of caustic soda 20° Baume, well mixed to form a
soapy compound. Of this one part of weight and two of pure tallow
soap are mixed, and of this mixture one ounce for each gallon of
water is used for the bleaching bath, and one ounce caustic soda
20° Baume for each gallon is added, when the bath is heated in
a close vessel, the goods entered, and boiled till sufficiently
bleached.
GEORGE W. WHISTLER, C.E.
PRINTING LANTERN PICTURES BY ARTIFICIAL LIGHT ON BROMIDE PLATES
EXPERIMENTS IN TONING GELATINO-CHLORIDE PAPER.
THE "SENSIM" PREPARING BOX.
NOTES ON GARMENT DYEING.
FUEL AND SMOKE.
Near Colorados, in the Argentine Republic, a large bed of
superior coal has been opened, and to the west of the Province of
Buenos Ayres extensive borax deposits have been discovered.
THE ANTI-FRICTION CONVEYER.
STUDIES IN PYROTECHNY.
IMPROVEMENT IN LAYING OUT FRAMES OF VESSELS—THE FRAME
TRACER.
TAR FOR FIRING RETORTS.
A NEW MERCURY PUMP.
NO ELECTRICITY FROM THE CONDENSATION OF VAPOR.—It has been
maintained by Palmieri and others that the condensation of vapor
results in the production of an electrical charge. Herr S. Kalischer has renewed his investigations upon this point, and
believes that he has proved that no electricity results from such
condensation. Atmospheric vapor was condensed upon a vessel coated
with tin foil, filled with ice, carefully insulated, and connected
with a very sensitive electrometer. No evidence could be obtained
of electricity.—Ann. der Physik und Chemie.
THE ELECTRO-MAGNETIC TELEPHONE TRANSMITTER.
ON ELECTRO-DISSOLUTION, AND ITS USE AS REGARDS ANALYSIS.
A NEWLY DISCOVERED SUBSTANCE IN URINE.
FURNACE FOR DECOMPOSING CHLORIDE OF MAGNESIUM.
THE FILTRATION AND THE SECRETION THEORY.
VARYING CYLINDRICAL LENS.
THE LAWS OF THE ABSORPTION OF LIGHT IN CRYSTALS.
HISTORY OF THE WORLD'S POSTAL SERVICE.
ON NICKEL PLATING.
CHILLED CAST IRON.
SNOW HALL.
ELIMINATION OF POISONS.
