NEW YORK, DECEMBER 24, 1881 Scientific American Supplement.
IMPROVED FIFTEEN TON CRANE.
IMPROVED STEAM-BOILER.
THE ELEVATED RAILWAYS OF NEW YORK.
SOME OF THE DEVELOPMENTS OF MECHANICAL ENGINEERING DURING THE
AMATEUR MECHANICS. METAL TURNING.
A NEW METHOD OF KEEPING MECHANICAL DRAWINGS. 1
ACHARD'S ELECTRIC BRAKE.
ELECTRICITY; WHAT IT IS, AND WHAT MAY BE EXPECTED OF IT. 1 By Jacob Reese
ELECTRIC LIGHT APPARATUS FOR PHOTOGRAPHIC PURPOSES. By A.J. Jarman .
DESRUELLES'S ELECTRIC LIGHTER
SOLENOID UNDERGROUND WIRES IN PHILADELPHIA.
DR. HERZ'S TELEPHONIC SYSTEMS.
DECISION OF THE CONGRESS OF ELECTRICIANS ON THE UNITIES OF ELECTRIC MEASURES.
SECONDARY BATTERIES. By J. Rousse.
THE TREATMENT OF QUICKSILVER ORES IN SPAIN.
THE BALLOON IN AERONAUTICS.
ARTISTS' HOMES. NO. 12 MR. WILLIAM EMERSON'S HOUSE AT LITTLE SUTTON, CHISWICK.
MEMORABLE ENGLISH HOUSES.
DOMESTIC SUGAR PRODUCTION.
HERALD ISLAND.
FRANZ LISZT.
M. GARNIER'S NEW METHODS OF PHOTOENGRAVING. By Major J. Waterhouse, B.Sc.
DANGERS OF PYROGALLIC ACID. By Dr. T.L. Phipson.
Scientific American Supplement.
PATENTS.
