Monday September 24, 1894

Went to Troughton & Simms with M^r Dyson and arranged with M^r Simms for a new Astrographic micrometer for measuring two plates at same time and for a Photographic spectroscope. Also gave M^r Simms a paper for positions of stops in new altazimuth to give a series of adopted azimuths.

William Christie, Astronomer Royal

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Went with the Astronomer Royal to Troughton & Simms’ works. M^r Simms & the Astronomer Royal discussed photographic spectroscope especially the kinds of glass obtainable, & the Micrometer for the Astrographic measures.

Frank Dyson, Chief Assistant