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Document Max. Freq Min. Freq
A Dictionary of Greek and Roman biography and mythology (ed. William Smith) 13 13 Browse Search
Knight's Mechanical Encyclopedia (ed. Knight) 2 2 Browse Search
Appian, The Foreign Wars (ed. Horace White) 1 1 Browse Search
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Knight's Mechanical Encyclopedia (ed. Knight), A. (search)
the settling of the land of Canaan by Joshua and the century before the Argonautic Expedition. The golden circle was carried away by Cambyses when he plundered Egypt, 525 B. C., about the time of Kung-fu-tze (Confucius). Ptolemy Euergetes, 246 B. C., placed in the square porch of the Alexandrian Museum an equinoctial and a solstitial armil, the graduated limbs of these instruments being divided into degrees and sixths. There were in the observatory stone structures, the precursors of our mural quadrants. On the floor a meridian line was drawn for the adjustment of the instruments. There were astrolabes and dioptras. The above were used from 246 B. C. to A. D. 417, and similar instruments at Cordova, A. D. 1000. Tubes with sights were probably used at both places; lenses being added in 1608. See articles under the following headings: — Altarimeter.Finder. Apomecometer.Heliometer. Armil.Meridian Circle. Armillary Sphere.Micrometer. Artificial Horizon.Mural Circle.