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Southern Historical Society Papers, Volume 15. (ed. Reverend J. William Jones) 7 3 Browse Search
Knight's Mechanical Encyclopedia (ed. Knight) 2 0 Browse Search
Southern Historical Society Papers, Volume 27. (ed. Reverend J. William Jones) 2 0 Browse Search
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Browsing named entities in Knight's Mechanical Encyclopedia (ed. Knight). You can also browse the collection for Richard Harris or search for Richard Harris in all documents.

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Knight's Mechanical Encyclopedia (ed. Knight), C. (search)
it their University of Cordova, had a sleep of six centuries, for it was reserved for the seventeenth century to bring it into general notice and usefulness. Early in the seventeenth century, Galileo, observing the oscillations of a suspended lamp, conceived the idea of making a pendulum a measurer of time, and in 1639 published a work on mechanics and motion, in which he discussed the isochronal properties of oscillating bodies suspended by strings of the same length. A. D. 1641, Richard Harris constructed a pendulum clock in London, for the church of St. Paul, Covent Garden. A. D. 1649, a pendulum clock was constructed by Vincenzio Galileo (the younger Galileo). A. D. 1650, Huyghens constructed clocks on this principle: — He first explained the nature, properties, and application of the pendulum, and made it perfect, except the compensation added by Graham, about 1700. Anchor pallets were introduced by Clement, in 1680, who also devised the mode of suspending the pend