Sentence Examples

  • In Short's first telescopes the specula were of glass, as suggested by Gregory, but he afterwards used metallic specula only, and succeeded in giving to them true parabolic and elliptic figures.
  • All Short's telescopes were of the Gregorian form, and some of them retain even to the present day their original high polish and sharp definition.
  • One of Short's mirrors, made about 1760 or 1770, of 6-in.