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" ... surface; and KL the polisher, which is of cast-iron, and weighs (for a 36-inch speculum, to which also the other dimensions above specified correspond) about 2-£ cwt. ; M is a round disc of wood connected with the polisher by strings hooked to it... "
The Monster Telescopes, Erected by the Earl of Rosse, Parsonstown: With an ... - Page 16
by Thomas Woods - 1844 - 54 pages
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Spectacles: when to wear and how to use them

Charles A. Long - 1861 - 228 pages
...connected with the polisher by strings hooked to it in six places, each two-thirds of the radius from the centre. At M there is a swivel and hook, to which a rope is attached, connecting the disc with a lever and counterpoise weight, so adjusted as to sustain the whole weight of the polisher,...
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The Telescope

John F. W. Herschel - Telescopes - 1861 - 208 pages
...connected with the polisher by strings hooked to it in six places, each two-thirds of the radius from the centre. At M there is a swivel and hook, to which a rope is attached, connecting the disc with a lever and counterpoise weight, so adjusted as to ' sustain the whole weight of the polisher,...
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Cyclopędia of useful arts & manufactures, ed. by C. Tomlinson. 9 divs, Volume 2

Cyclopaedia - 1852 - 264 pages
...the polisher by strings hooked to it in 6 places, each two-thirds of the radins from the centre. At D is a swivel and hook, to which a rope is attached connecting the whole with the lever L, so that the polisher presses upon the speculum with a foree equal to the difference between its...
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