Wednesday, 9 December 2009

Monday December 9, 1894

Went to Troughton & Simms about Astrographic micrometer, Posn mic. of 28in telescope, new Altazimuth &c. Mr Simms gave me a specimen of Mantics’[?] ordinary dense flint (very transparent) for new photo-spectroscope.

William Christie, Astronomer Royal

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