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File:The American Museum journal (c1900-(1918)) (17972626308).jpg

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Title: The American Museum journal
Identifier: americanmuseumjo15amer (find matches)
Year: c1900-(1918) (c190s)
Authors: American Museum of Natural History
Subjects: Natural history
Publisher: New York : American Museum of Natural History
Contributing Library: American Museum of Natural History Library
Digitizing Sponsor: Biodiversity Heritage Library

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About This Book: Catalog Entry
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Text Appearing Before Image:
The dark-line nebula in the constellation Virgo. Photographed with the 40-inch reflector, April 18, 1911. An object of unusual interest on account of Vts rapid motion — 600 miles per second in the line of sight — and also because it is the first nebula for which rotation about an axis and proper-motion have been observed
Text Appearing After Image:
The "dumb-bell" nebula in the constellation Vulpecula. graphed with the 40-inch reflector of the Lowell Observatory in the tail gives evidence of solar forces repelling them. Both slit and slit- less prismatic photo- graphs of Halley's, (yale's, Brook's and other comets of recent years, segregate and make known the va- rious constituents. In this analysis the prism differentiates the con- stitution of the head and tail, and even the substances composing different streamers in the tail can be iden- tified. In general, comet spectra are quite similar; they show the existence, usually, of cyanogen, sodium and hydro- carbons in the head while carbon mon- oxide and solid sun- lit particles produce mainly comet tails. The spectrograph serves also as a ba- rometer which enables one to read many of the existing conditions of planetary atmos- pheres. It tells us that Jupiter, Saturn, Uranus and Neptune are surrounded by very dense atmos- pheres and that the densities of these in- crease with the dis- tances of the planets from the sun. It was by this means that evidence has been secured at the Lowell Photo-

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https://www.flickr.com/photos/internetarchivebookimages/17972626308/

Author Internet Archive Book Images
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(Reusing this file)		 At the time of upload, the image license was automatically confirmed using the Flickr API. For more information see Flickr API detail.
Volume
InfoField
1915
Flickr tags
InfoField
  • bookid:americanmuseumjo15amer
  • bookyear:c1900-[1918]
  • bookdecade:c190
  • bookcentury:c100
  • bookauthor:American_Museum_of_Natural_History
  • booksubject:Natural_history
  • bookpublisher:New_York_American_Museum_of_Natural_History
  • bookcontributor:American_Museum_of_Natural_History_Library
  • booksponsor:Biodiversity_Heritage_Library
  • bookleafnumber:268
  • bookcollection:biodiversity
  • bookcollection:americanmuseumnaturalhistory
  • bookcollection:americana
  • BHL Collection
  • BHL Consortium
Flickr posted date
InfoField
27 May 2015


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