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Monthly Notices of the Royal Astronomical Society Volume 22 (Paperback) Loot Price: R384
Discovery Miles 3 840
Monthly Notices of the Royal Astronomical Society Volume 22 (Paperback): Royal Astronomical Society

Monthly Notices of the Royal Astronomical Society Volume 22 (Paperback)

Royal Astronomical Society

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Loot Price R384 Discovery Miles 3 840

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1862 Excerpt: ...as the Fellows of this Society well know, was one of extreme complexity; for not only must the motion of the clock-work be perfectly smooth and equable, but it must also be capable of acceleration and retardation, to keep pace, so to speak, with the ever-varying velocity of the Moon in the heavens--a variation compounded of its diurnal motion and its ever-changing velocity in its orbit. Lastly, by a rare and happy combination of chemical with mechanical skill, the time necessary for the exposure of the collodion film was materially shortened. The final result is this, --that images of the Moon have been repeatedly taken in the focus of the mirror, admitting of very considerable amplification, and exhibiting details on the Moon's surface sufficiently clear to admit of delineation under a microscope provided with a camera lucida, and thereby furnishing materials for a more accurate selenography than has heretofore existed. Neither must we altogether omit that by stereoscopically combining images of the Moon taken in different phases of her librations, more particularly enlarged copies eight inches in diameter, Mr. De La Rue has brought to light details of dykes, and terraces, and furrows, and undulations on the lunar surface, of which no certain knowledge had previously existed, and which I have had the exquisite pleasure of beholding in his Observatory at Cranford. "Man looks aloft, and, with erected eyes, Beholds his own hereditary skies." I must now turn to a department in Celestial Photography, where Mr. De La Rue stands almost alone. I speak of Heliography: In April 1854, Sir John Herschel, in a letter to Colonel Sabine, recommended that daily photographic records of the Sun should be obtained at some observatory. Accordingly, the Royal Society ...


Imprint: Rarebooksclub.com
Country of origin: United States
Release date: March 2012
First published: March 2012
Authors: Royal Astronomical Society
Dimensions: 246 x 189 x 5mm (L x W x T)
Format: Paperback - Trade
Pages: 86
ISBN-13: 978-1-130-03093-8
Categories: Books > Humanities > History
Books > Humanities > History > General
Books > History > General
LSN: 1-130-03093-8
Barcode: 9781130030938

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