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The Great Telescope, (of 52 feet focus, 6 feet clear opening of speculum) erected at Birr Castle in Ireland, by the Earl of Rosse, president of the Royal Society; Lord Rosse directing the conveyance of the Great Speculum to its position at the Base of the Tube, North Side; by William Bevan after Miss Henrietta M. Crompton, with figures by Herbert C. Herries.

Wellcome Collection, Public Domain via https://wellcomecollection.org/works/m4urzmzv

Color and cropping edits.

#telescope

Astronomy: a large refracting telescope, at Birr Castle, Ireland. Lithograph by W. Bevan after Miss Henrietta M. Crompton, with figures by H. C. Herries.

Wellcome Collection
#telescope

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