Sentence Examples


  • A still further facility was given to the use of the filar micrometer by the introduction of clockwork, which caused the telescope automatically to follow the diurnal motion of a star, and left the observer's hands entirely at liberty.'
  • ' So far as we can ascertain, the first telescope of large size driven by clockwork was the 9-in.
  • In 1757 he presented a telescope to the king, so accurately driven by clockwork that it would follow a star all night long.
  • One drawback to this form of instrument is that the two webs cannot be viewed simultaneously, and therefore the observer must rely on the steadiness of rate of the clockwork and uniformity in the conditions of refraction whilst the eye is moved from one eyepiece to the other.
  • Struve published an account of the application of clockwork as an aid in Repsold's method; and, later, Dr Cohn published a more elaborate paper on the same subject in the Astron.

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