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"Transverse section of a closed fibro-vascular bundle. r, annular vessel; s, spiral vessel; I, inter-cellular canal; g, pitted vessel; v, cambiform tissue which has become permanent. Between v and s are reticulated vessels. p, surrounding parenchyms. Outer cells a of the bundle are parenchymatous, i marks the inner side of the bundle." — Encyclopedia Britanica, 1893

Fibro-vascular Bundle

"Transverse section of a closed fibro-vascular bundle. r, annular vessel; s, spiral vessel; I, inter-cellular…

"An annular vessel taken from the Melon plant." — Encyclopedia Britanica, 1893

Melon Plant

"An annular vessel taken from the Melon plant." — Encyclopedia Britanica, 1893

"1. In rope-drilling, a cylinder, provided with a valve at the bottom, which is lowered into the drill-hole from time to time to remove the pulverized rock, or sludge. Also called a sludger. 2. A powerful water-jet with an annular nozle inclosing a tube which is sunk in loose sand, and operates as an injector to lift the sand with the water which discharges back through the tube. a. sand to be removed, b. suction-pipe, c. induction-pipe, d. discharge-pipe" —Whitney, 1889

Sand Pump

"1. In rope-drilling, a cylinder, provided with a valve at the bottom, which is lowered into the drill-hole…

"Illustration showing various forms of the siphon." —Hallock 1905

Various Siphons

"Illustration showing various forms of the siphon." —Hallock 1905

The circular so-called "Temple of Vesta" at Tivoli, of the early first century BCE, has been widely admired since the Renaissance. Its ruins sit on the acropolis of the Etruscan and Roman city of Tibur (now Tivoli), overlooking the falls of the Aniene in a picturesque narrow gully.

Temple of Vesta, Tivoli

The circular so-called "Temple of Vesta" at Tivoli, of the early first century BCE, has been widely…