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Image from page 81 of "The London, Edinburgh and Dublin philosophical magazine and journal of science" (1840)

Image from page 81 of
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Identifier: londonedinburgh5321891lon
Title: The London, Edinburgh and Dublin philosophical magazine and journal of science
Year: 1840 (1840s)
Authors:
Subjects: Science
Publisher: London : Taylor & Francis
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library


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Text Appearing Before Image:
cept that the line of light formingthe diagram would have been finer. We have only been able to run this toy engine at a maxi-mum speed of about 900 revolutions per minute, and indeedat this speed it was rather dangerous to run it, as, throughwant of balance, it set the floor and everything in the rooma-shaking; but even at this high speed there was no evidenceon the diagram of any waviness due to the natural vibrationsof the disk of the indicator. There was, however, a musicalnote in evidence of the existence of such vibrations. Mr. Holland has used a tapering wooden box as if it werea camera for photographing the diagram and its atmo-spheric line, and he tells me that it is quite easy to takesuch photographs. He is, however, accustomed to such work,and I do not think that an ordinary engine-driver would careto try the photographic method. I here exhibit some of Mr.Hollands photographs. This one, fig. 4, required an ex-posure of one minute, the light being that of an ordinary Fie. 4.

Text Appearing After Image:
Fig. 5.


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Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.
Date: 2014-07-28 16:06:08



bookid:londonedinburgh5321891lon bookyear:1840 bookdecade:1840 bookcentury:1800 booksubject:Science bookpublisher:London___Taylor___Francis bookcontributor:Smithsonian_Libraries booksponsor:Biodiversity_Heritage_Library bookleafnumber:81 bookcollection:biodiversity BHL Collection BHL Consortium

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