Abstract
PREVIOUS to the designing of the f/0-36 Spectrographic object-glass referred to in Dr. G. E. Hale's article (see special supplement to NATURE of February 8) observations made at Mount Wilson Observatory by means of the f/0-59 Ray ton lens had shown that the apparent velocities of recession of the more remote nebulae are extraordinarily high and that they increase with the distances of the nebulae. These observations had been extended as far into space as appeared to be practicable with the f/O-59 Ray ton lens, and it was with the object of increasing the range within which the nebulae could be investigated spectrographically that the designing of a Spectrographic lens of larger aperture was undertaken by the British Scientific Instrument Research Association.
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Spectrographic Equipment of the 200-inch Telescope. Nature 137, 643–645 (1936). https://doi.org/10.1038/137643a0
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DOI: https://doi.org/10.1038/137643a0