A thermostatic motor.

A device for sealing together the inside part and bulb of an
incandescent lamp mechanically.

Regulators for dynamos and motors.

Three devices for utilizing vibrations beyond the ultra violet.

A great variety of methods for coating incandescent lamp filaments with
silicon, titanium, chromium, osmium, boron, etc.

Several methods of making porous filaments.

Several methods of making squirted filaments of a variety of materials,
of which about thirty are specified.

Seventeen different methods and devices for separating magnetic ores.

A continuously operative primary battery.

A musical instrument operating one of Helmholtz's artificial larynxes.

A siren worked by explosion of small quantities of oxygen and hydrogen
mixed.

Three other sirens made to give vocal sounds or articulate speech.

A device for projecting sound-waves to a distance without spreading and
in a straight line, on the principle of smoke rings.

A device for continuously indicating on a galvanometer the depths of the
ocean.

A method of preventing in a great measure friction of water against the
hull of a ship and incidentally preventing fouling by barnacles.

A telephone receiver whereby the vibrations of the diaphragm are
considerably amplified.

Two methods of "space" telegraphy at sea.

An improved and extended string telephone.

Devices and method of talking through water for considerable distances.

An audiphone for deaf people.

Sound-bridge for measuring resistance of tubes and other materials for
conveying sound.

A method of testing a magnet to ascertain the existence of flaws in the
iron or steel composing the same.

Method of distilling liquids by incandescent conductor immersed in the
liquid.

Method of obtaining electricity direct from coal.

An engine operated by steam produced by the hydration and dehydration of
metallic salts.

Device and method for telegraphing photographically.

Carbon crucible kept brilliantly incandescent by current in vacuo, for
obtaining reaction with refractory metals.

Device for examining combinations of odors and their changes by rotation
at different speeds.

From one of the preceding items it will be noted that even in the
eighties Edison perceived much advantage to be gained in the line of
economy by the use of lamp filaments employing refractory metals in
their construction. From another caveat, filed in 1889, we extract the
following, wh