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"Metallic flame arc lamp." —Croft 1917

Metallic Flame Arc Lamp

"Metallic flame arc lamp." —Croft 1917

"A black insect, with brilliant metallic blue or purple reflections on the under side, and well known as "wheeling its drowsy flight" during fine evenings. This it does in search of a patch of cow-dung, through which it makes its way until reaching the ground, where it bores a perpendicular tunnel about 8 inches deep, and as wide as a man's finger; then ascending to the surface it conveys a quantity of dung to the bottom, and on this it proceeds to deposit an egg; another layer of the same material and another egg follow until the entire shaft is filled." — Encyclopedia Britanica, 1893

Dung Beetle

"A black insect, with brilliant metallic blue or purple reflections on the under side, and well known…

"A black insect, with brilliant metallic blue or purple reflections on the under side, and well known as "wheeling its drowsy flight" during fine evenings. This it does in search of a patch of cow-dung, through which it makes its way until reaching the ground, where it bores a perpendicular tunnel about 8 inches deep, and as wide as a man's finger; then ascending to the surface it conveys a quantity of dung to the bottom, and on this it proceeds to deposit an egg; another layer of the same material and another egg follow until the entire shaft is filled." — Encyclopedia Britanica, 1893

Dung Beetle

"A black insect, with brilliant metallic blue or purple reflections on the under side, and well known…

"A black insect, with brilliant metallic blue or purple reflections on the under side, and well known as "wheeling its drowsy flight" during fine evenings. This it does in search of a patch of cow-dung, through which it makes its way until reaching the ground, where it bores a perpendicular tunnel about 8 inches deep, and as wide as a man's finger; then ascending to the surface it conveys a quantity of dung to the bottom, and on this it proceeds to deposit an egg; another layer of the same material and another egg follow until the entire shaft is filled." — Encyclopedia Britanica, 1893

Dung Beetle

"A black insect, with brilliant metallic blue or purple reflections on the under side, and well known…

"The Sternoxi include the Metallic Beetles, Buprestidae the most gorgeous of the coleopterous families. Some have a general coppery hue, whilst some present the beautiful contrast of fine yellow spots and marks upon a highly polished blue or green ground, and others exhibit the appearance of burnished gold or of rubies, inlaid on emerald of emony. The elytra of the Metallic Beetles are those usually employed in the embroidery of ladies' dresses and for other purposes of personal ornament. They are most plentiful in the thick forests of tropical countries, and seem partial to stage in the heart of timber." — Encyclopedia Britanica, 1893

Metallic Beetle

"The Sternoxi include the Metallic Beetles, Buprestidae the most gorgeous of the coleopterous families.…

"The Sternoxi include the Metallic Beetles, Buprestidae the most gorgeous of the coleopterous families. Some have a general coppery hue, whilst some present the beautiful contrast of fine yellow spots and marks upon a highly polished blue or green ground, and others exhibit the appearance of burnished gold or of rubies, inlaid on emerald of emony. The elytra of the Metallic Beetles are those usually employed in the embroidery of ladies' dresses and for other purposes of personal ornament. They are most plentiful in the thick forests of tropical countries, and seem partial to stage in the heart of timber." — Encyclopedia Britanica, 1893

Metallic Beetle Larva

"The Sternoxi include the Metallic Beetles, Buprestidae the most gorgeous of the coleopterous families.…

Scarabaeidae. Stout-bodied beetles, many with bright metallic colors.

Scarab Beetle

Scarabaeidae. Stout-bodied beetles, many with bright metallic colors.

"The electrical machine most usually employed consists of a large circular plate of glass, mounted upon a metallic axis, and supported upon pillars fixed to a secure base, so that the plate can, by means of a handle, w, be turned with ease. Upon the supports of the glass, and fixed so as to press easily but uniformly on the plate, are four rubbers, marked r r r r in the figure; and flaps of silk, s s, oiled on one side, are attached to these, and secured to fixed supports by several silk cords. When the machine is put in motion, these flaps of silk are drawn tightly against the glass, and thus the friction is increased, and electricity excited. The points p p collect the electricity from the glass, and convey it to the conductor, c, which is supported by the glass rod g." —Wells, 1857

Electrical Machine

"The electrical machine most usually employed consists of a large circular plate of glass, mounted upon…

"A form of an electrical machine. S being the glass cylinder turning on an axis, Y the conductor, F the rubber, A A supports." —Wells, 1857

Electrical Machine

"A form of an electrical machine. S being the glass cylinder turning on an axis, Y the conductor, F…

"Hemholtz constructed a series of resonators, each one of which responds powerfully to a single tone of certain pitch or wavelength. they are metallic vessels, nearly spherical, having an opening, as at A, for the admission of the sound waves." -Avery 1895

Hemholtz Resonator

"Hemholtz constructed a series of resonators, each one of which responds powerfully to a single tone…

"Bring a metallic sphere postively charged near an insulated cylindrical conductor with hemispherical ends and provided with pith-ball and lined thread electroscopes as shown. The divergence of the pith-balls shown electrification at the ends but not at the middle of the conductor." -Avery 1895

Electrostatic Induction

"Bring a metallic sphere postively charged near an insulated cylindrical conductor with hemispherical…

"D is a Leyden jar, fastened to a stand in such a way that its outer armature can be insulated or connected to earth at will. The inner armature is in good metallic connection with the knob C. A horizontal metal piece A is mounted on a glass pillar, and carries another knob, which can be set at any required distance from C by means of a screw and graduation. The piece A is connected with the outer armature of the jar by a thin wire B contained in a glass tube." — Encyclopedia Britannica, 1893

Lanes Jar

"D is a Leyden jar, fastened to a stand in such a way that its outer armature can be insulated or connected…

"Metallic calcium is prepared by passing an electric current through fused calcium chloride contained in a cruicible of graphite, which acts as the anode." -Brownlee 1907

Metallic Calcium Preparation

"Metallic calcium is prepared by passing an electric current through fused calcium chloride contained…

"To make the ligament, a very large number of exceedingly fine copper wirers laid close together are soldered to the upper surface of the upper trunnion." —Encyclopedia Britannica, 1910

Kelvin Flexible Metallic Ligament

"To make the ligament, a very large number of exceedingly fine copper wirers laid close together are…

A straight or slightly curved metallic bar, with teeth n one of its edge, adapted to work into the teeth of a wheel or pinion, for the purpose of converting a circular into a rectilinear motion or vice versa.

Machinery Rack

A straight or slightly curved metallic bar, with teeth n one of its edge, adapted to work into the teeth…

"If in a complete metallic circuit having junctions of disimilar metals, the juntions are at different temperatures, then generally a steady current will flow in the circuit as long as the differences of the temperatures of the junction is maintained." -Hawkins, 1917

Seebeck Effect

"If in a complete metallic circuit having junctions of disimilar metals, the juntions are at different…

"Method of using a grounded metallic comb near the driving belt to relieve the belt of static charges." —Croft 1920

Using a Grounded Metallic Comb to Reduce Static Charge, Front and Side View

"Method of using a grounded metallic comb near the driving belt to relieve the belt of static charges."…

"Method of using a grounded metallic comb near the driving belt to relieve the belt of static charges." —Croft 1920

Using a Grounded Metallic Comb to Reduce Static Charge, Perspective View

"Method of using a grounded metallic comb near the driving belt to relieve the belt of static charges."…

"It consists of a common metallic syringe, A, screwed to a cylindrical valve box, B, which contains two ovoid cavities, in each of which there is a loose, spherical metallic valve. The ends of the cavities are peirced, and the valves fit exactly, either of the orifices. Thus it makes no difference which end of the valve-box is upturned, the valve falling down and closing the orifices in either direction. The flexible india rubber tubes, C D, are attached to the opposite ends of the cavities." —Comstock, 1850

Stomach Pump

"It consists of a common metallic syringe, A, screwed to a cylindrical valve box, B, which contains…