Thursday, 24 September 2009
Monday September 24, 1894
Went to Troughton & Simms with Mr Dyson and arranged with Mr Simms for a new Astrographic micrometer for measuring two plates at same time and for a Photographic spectroscope. Also gave Mr Simms a paper for positions of stops in new altazimuth to give a series of adopted azimuths.
William Christie, Astronomer Royal
Went with the Astronomer Royal to Troughton & Simms’ works. Mr Simms & the Astronomer Royal discussed photographic spectroscope especially the kinds of glass obtainable, & the Micrometer for the Astrographic measures.
Frank Dyson, Chief Assistant