Abstract
SIR FRANK DYSON'S presidential address to the Optical Society on February 8 on the subject of “Large Telescopes” dealt with the progressive advance of astronomy so far as it was brought about by the increased optical powers of telescopes. The Copernican system was established before the discovery of the telescope, but Galileo's telescope removed many difficulties and commanded its acceptance. The great telescopes of Herschel revealed the vast extent and variety of the stellar system. At the beginning of the nineteenth century, excellent achromatic telescopes of 6 inches were made by Fraun-hofer and Merz, and in 1824 an object glass of 9.6 inches was made for Struve at Dorpat with which the carried out his great work on double stars.
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Large Telescopes and their Work. Nature 111, 447–448 (1923). https://doi.org/10.1038/111447a0
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DOI: https://doi.org/10.1038/111447a0