PRESERVATION OF INSECTS.
QUADRIGA FOR THE NEW HOUSE OF PARLIAMENT, AT VIENNA.
The strongest wood in the United States, according to Professor Sargent,
is that of the nutmeg hickory of the Arkansas region, and the weakest the
West Indian birch (Rur seva). The most elastic is the tamarack, the
white or shellbark hickory standing far below it. The least elastic and
the lowest in specific gravity is the wood of the Ficus aurea. The
highest specific gravity, upon which in general depends value as fuel, is
attained by the bluewood of Texas (Condalia obovata).
GLAZED WARE FINIAL.
WAGE EARNERS AND THEIR HOUSES.
HOTEL DE VILLE, ST. QUENTIN.
FIRE DOORS IN MILLS.
STEEL STRUCTURES.
Equal volumes of amyl alcohol (rectified fusel oil) and pure concentrated
hydrochloric acid, shaken together in a test tube, unite to form a single
colorless liquid; if one volume of benzine (from petroleum) be added to
this, and the tube well shaken, the contents will soon separate into
three distinct colorless fluids, the planes of demarkation being
clearly discernible by transmitted light. Drop into the tube a particle
of "acid magenta;" after again shaking the liquids together, the lower
two zones will present different shades of red, while the supernatant
hydrocarbon will remain without color.
A METHOD OF MEASURING THE ABSOLUTE SENSITIVENESS OF PHOTOGRAPHIC DRY
PLATES.
NATURAL GAS FUEL AND ITS APPLICATION TO MANUFACTURING
PURPOSES.
A GAS-ENGINE WATER-SUPPLY ALARM.
SOLDERING AND REPAIRING PLATINUM VESSELS IN THE LABORATORY.
THE HELICOIDAL OR WIRE STONE SAW.
PORTABLE PROSPECTING DRILL.
AUTOMATIC SAFETY GEAR.
THE WATER SUPPLY OF ANCIENT ROMAN CITIES.
STEAM ENGINE ECONOMY.
ELECTRICITY IN WARFARE.
MEUCCI'S CLAIMS TO THE TELEPHONE.
AN ELECTRICAL CENTRIFUGAL MACHINE FOR LABORATORIES.
TRANSMISSION OF POWER BY ELECTRICITY.
THE LOCKED AND CORDED BOX TRICK.
PRICES OF METALS.
A PERPETUAL CALENDAR.
AN ACCOMPLISHED PARROT.
THE ROSCOFF ZOOLOGICAL LABORATORY.
THE MURÆNÆ AT THE BERLIN AQUARIUM.
METAMORPHOSES OF ARCTIC INSECTS.
A YEAR'S SCIENTIFIC PROGRESS IN NERVOUS AND MENTAL DISEASES.
SCARING THE BABY OUT.
"ELASTIC LIMIT" IN METAL.
