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"Aldrovanda vesiculosa. Leaf pressed open and enlarged, showing glands, sensitive filaments, and quadrifid hairs." — The Encyclopedia Britannica, 1893

Aldrovanda

"Aldrovanda vesiculosa. Leaf pressed open and enlarged, showing glands, sensitive filaments, and quadrifid…

"A, portion of a colony of Antipathes dichotoma. B, single zooid and axis of the same magnified. m, mouth; mf, mesenterial filament; ax, axis. C, transverse section through the oral cone of Antipathella minor; st, stomodaeum; ov, ovary." — The Encyclopedia Britannica, 1910

Antipathes Dichotoma

"A, portion of a colony of Antipathes dichotoma. B, single zooid and axis of the same magnified. m,…

Wire inside an incandescent light bulb that produces light.

Lighting Filament

Wire inside an incandescent light bulb that produces light.

The incandescent light bulb is a source of electric light that works by heat driven light emissions. An electric current passes through a thin filament, heating it until it produces light.

The Light Emitting Incandescent Lamp

The incandescent light bulb is a source of electric light that works by heat driven light emissions.…

The incandescent light bulb, is a source of electric light that works by incandescence which is a general term for heat driven light emissions, which includes the simple cases of black body radiation.

Process of Producing Incandescing Bodies for Electric Lamps

The incandescent light bulb, is a source of electric light that works by incandescence which is a general…

"Edison's first lamp with a filament of bamboo fibre." -Bodmer, 1917

Edison's First Light Bulb

"Edison's first lamp with a filament of bamboo fibre." -Bodmer, 1917

"The spinal cord and nerve-roots. A, a small portion of the cord seen from the ventral side; B, the same seen laterally; C, a cross-section of the cord; D, the two roots of a spinal nerve; 1, ventral fissure; 2, dorsal fissure; 3, surface groove along the line of attachment of the ventral nerve-roots; 4, line of origin of the dorsal roots; 5, ventral root filaments of spinal nerve; 6, dorsal root filaments; 6', ganglion of the dorsal root; 7, 7', the first two divisions of the nerve-trunk after its formation by the union of the two roots. The grooves are much exaggerated." —Martin, 1917

Nerve Roots

"The spinal cord and nerve-roots. A, a small portion of the cord seen from the ventral side; B, the…

"Section of Unstratified Thallus of Collema conglomeratum, with Moniliform Gonimia scattered amongst the Hyphal Filaments." —The Encyclopedia Britannica, 1910

Thallus

"Section of Unstratified Thallus of Collema conglomeratum, with Moniliform Gonimia scattered amongst…

"Sensitive glands of Dionaea muscipula, x 300." — The Encyclopedia Britannica, 1893

Venus Fly-trap

"Sensitive glands of Dionaea muscipula, x 300." — The Encyclopedia Britannica, 1893