Other
Scientific paper
Mar 1882
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1882natur..25..507c&link_type=abstract
Nature, Volume 25, Issue 648, pp. 507 (1882).
Other
Scientific paper
IN your present week's ``Notes'' you have referred to the curious experiences of MM. Macé de Lepinay and Nicati, in finding the town lights appear green, after five hours among snow-fields. On the Cima di Jazi, some 16,000 feet or more high, I found another effect. On removing my blue snow-glasses, the sky (at about 10 a.m.) appeared of the deepest indigo colour, while the sun could be looked at without pain, and resembled a harvest-moon close to the horizon, of a red yellow tint, and with a well-defined outline. The effect disappeared as we descended the mountain. As another instance of temporary affliction of the retina, I had been using on the sun, as examined with an 8¼-inch reflector, a miniature spectroscope with fine slit, notwithstanding which the spectrum was very bright. Some hours (not immediately) after, all the gas lamps, candles, &c, appeared of a blood red, and so continued for some hours. This effect still persisted at dinner-time, hut gradually a-nd entirely passed off during the meal. No trace of green tint was, in this case, seen. In the sun-glare it is not uncommon with some persons, to find leaves and other small objects on the path, of a red tint.
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