Account of Improvements in Chronometers
Palmer and Clayton, and sold by J. Murray, 1842 - Chronometers - 25 pages
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Common terms and phrases
action adjustment Admiralty advantage affixed Airy application arcs Astronomer Royal attached attention auxiliary power balance balance-rim bearing brass called changes of temperature character chronometer-makers chronometers circle circumstances claims commonly compared compensation consideration construction correct describe difficulty Eiffe Eiffe's error excellence Excess experiments extremes of temperature figure five give heat and cold important improvements IMPROVEMENTS IN CHRONOMETERS intended introduced invention isochronal known Lords Commissioners losing machine manner mean mean temperature mechanical modification Molyneux necessary object obtain patent perform pieces placed pocket chronometer portions position prepared present principle public trial reference Report represented reward ROBERT MOLYNEUX Royal Observatory Royal Society screws seconds seen short shown shows similar specification spring steel substance supplementary compensating temperature trial tried usual vibrations weights
Page 19 - Sheriff have hereunto set my Hand and Seal this Seventh day of September, in the fifth year of the Reign of our Sovereign Lord George the Third.
Page 15 - ... it will be deprived of a great part of its polarity. It presents to the eye a spherical action, and forms one grand universal compensating power, in connexion with the arcs of the circle. It scarcely requires any definition ; the object is at once seen to the now fully informed reader and examiner.