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Home > History and Archaeology > History > Common Things Explained, Containing; Earth, Fire, Water, Time, the Almanack, Clocks and Watches Spectacles, Colour, Kaleidoskope, Pumps, from the Museum of Science and Art: With One Hundred and Fourteen Illustrations
Common Things Explained, Containing; Earth, Fire, Water, Time, the Almanack, Clocks and Watches Spectacles, Colour, Kaleidoskope, Pumps, from the Museum of Science and Art: With One Hundred and Fourteen Illustrations

Common Things Explained, Containing; Earth, Fire, Water, Time, the Almanack, Clocks and Watches Spectacles, Colour, Kaleidoskope, Pumps, from the Museum of Science and Art: With One Hundred and Fourteen Illustrations


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About the Book

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. 1855 Excerpt: ...moon be understood, this rule (after the explanation given above of the mode of expressing the age of the moon) is clear and definite. It will be observed, that, according to the terms of the rule, if the 14th day be Sunday, Easter-day must be the following Sunday; but the 21st of March may itself be the 14th day. It remains, therefore, only to explain the conditions which define the fictitious object which we have here called the ECCLESIASTICAL MOON. HOW TO PREDICT EASTER. 22. Let it be remembered that the astronomical year consists of 365 days, 5 hours, 48 minutes, and 48 seconds, and that a lunar month varies in length from about 29 days to 29J days, its average length being exactly 29 days, 12 hours, 44 minutes, and 3 seconds. It will appear from these numbers that 19 astronomical years consist of about D. B. m. S. 6939 14 27 12, while 235 average lunar months consist of about D. H. M. S. 6939 16 31 45. It appears, therefore, that 235 average lunar months exceed 19 astronomical years by only 2 hours, 4 minutes, and 33 seconds. It follows from this, that if the course of time be resolved into a succession of periods, or cycles, of 19 astronomical years, the same phases of the moon which are presented in any year of one cycle will be reproduced in the corresponding year of the next cycle, on the same days, but 2 hours, 4 minutes, and 33 seconds later. If, therefore, the dates of the phases, those of the new moons for example, in each successive year of any one such cycle be ascertained, either by immediate observation or by calculation, their dates in the successive years of the next cycle will be on the same days, but 2 hours, 4 minutes, and 33 seconds later. If, therefore, time were counted by astronomical years, and if the period of the lunar cha...


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Product Details
  • ISBN-13: 9781130495294
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 120
  • Spine Width: 6 mm
  • Weight: 227 gr
  • ISBN-10: 1130495299
  • Publisher Date: 01 Mar 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Sub Title: With One Hundred and Fourteen Illustrations
  • Width: 189 mm

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Common Things Explained, Containing; Earth, Fire, Water, Time, the Almanack, Clocks and Watches Spectacles, Colour, Kaleidoskope, Pumps, from the Museum of Science and Art: With One Hundred and Fourteen Illustrations
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