A black enamelled and lacquered brass spectrometer , the stage inscribed W.Wilson London , the two telescopes with rack-and-pinion adjustment, the rotating stage with 'Roland' metal defraction grating showing 14510 lines to the inch, the horizontal circle with twin verniers on tripod stand with prism in carrying case - 12¾in. (32.2cm.) wide
A black enamelled and lacquered brass spectrometer , the stage inscribed W.Wilson London , the two telescopes with rack-and-pinion adjustment, the rotating stage with 'Roland' metal defraction grating showing 14510 lines to the inch, the horizontal circle with twin verniers on tripod stand with prism in carrying case - 12¾in. (32.2cm.) wide
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