(1872-1932) German Opera Singer who was particularly successful in her rendering of Wagner. She was…
(1850-1925) Polish operatic singer. Renowned internationally for the high quality of his singing and…
Marcella Sembrich (February 15, 1858 – January 11, 1935 was the stage name of the Polish coloratura…
A wheel or ring fixed to a framework, toothed on its inner side, and having in gear with it another…
A machine used for lifting water, thought to have been invented by Archimedes in egypt for draining…
The dynamo machine generates electric currents by converting motive power into electricity through the…
A machine that spins test tubes full of liquid. Uses centripetal forces to seperate the liquid.
"Manassasas Junction, showing the evacuated Confederate fortifications, abondoned camps and wagons,…
"Infernal machine designed by the Confederates to destroy the Federal Flotilla in the Potomac discovered…
Overbalancing wheel, gravity principle. Illustration of an unsuccessful scheme for a perpetual-motion…
Archimedean screw, gravity principle. Illustration of an unsuccessful scheme for a perpetual-motion…
Liquids of varying densities. Illustration of an unsuccessful scheme for a perpetual-motion device.
Sponge plan, capillary principle. Illustration of an unsuccessful scheme for a perpetual-motion device.
Magnetic attraction on inclined plane. Illustration of an unsuccessful scheme for a perpetual-motion…
Buoyancy chambers, hydrostatic principle. Illustration of an unsuccessful scheme for a perpetual-motion…
Magnetic pendulum, rotating field principle. Illustration of an unsuccessful scheme for a perpetual-motion…
Tredwell of Boston invented the first power press. The type is raised to meet the platen.
"The Confederate invasion of Maryland and Pennsylvania. The Confederate cavalry crossing the Potomac,…
"Five locomotives built at Vicksburg, Miss., by the Federal soldiers, under the superintendence of Colonel…
A check-row corn-planter, which plants two rows at once and rows the corn both ways.
The nightingale is renowned for its song. Its name is derrived from the Saxon meaning night-singer.
"Calenders heated internally by steam, for spreading India Rubber into sheets or upon cloth, called…
Signal Lever and Interlocking Tappet. F - Floor of Cabin G - Grove for interlocking bar N - Tappet V…
A machine or apparatus employed to reduce temperature by chemical or mechanical means.
"The guillotine was used during the Reign of Terror of the French Revolution. Now that the power of…
"A Crane is a machine for lifting weights, worked either by hand or by steam, or by hydraulic power.…
"A Fire Engine is a machine employed for throwing a jet of water for the purpose of extinguishing fires.…
"A Flying Machine is a device for enabling man to navigate the air. The feat of flying has been often…
"Galvanism is the branch of electric science to which an experiment by Galvani gave birth. His wife,…