Abstract
MOREHOUSE'S COMET, 1908c.—Writing to the Astronomische Nachrichten (No. 4284, p. 194, November 21), Prof. E. C. Pickering transmits a message from Prof. Frost directing attention to the increased brightness of Morehouse's comet towards the end of October. It was easily seen, at the Yerkes Observatory, with the unaided eye, whilst with a small field-glass three or four degrees of tail became visible. With the Zeiss ultra-violet objective-prism camera three exposures on spectrum plates were made by Mr. Parkhurst and Prof. Frost, two of them each of one hour's duration. At the time of writing the measurement of the spectra was not complete, but Prof. Frost suggests that they are of the ordinary hydrocarbon type. As no continuous spectrum is perceptible, it is concluded that the radiations at the time of exposure (October 28) were, to a very large extent, intrinsic.
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Our Astronomical Column . Nature 79, 142–143 (1908). https://doi.org/10.1038/079142a0
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DOI: https://doi.org/10.1038/079142a0