The British Almanac Of The Society For The Diffusion Of Useful Knowledge For The Year 1839 Classic Reprint

Download or read book The British Almanac of the Society for the Diffusion of Useful Knowledge, for the Year 1839 (Classic Reprint) written by Diffusion Of Useful Knowledge Society and published by Forgotten Books. This book was released on 2017-12-26 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The British Almanac of the Society for the Diffusion of Useful Knowledge, for the Year 1839 IN the Almanacs of the Society the calculations are all made for meantime (given by the clock), instead of apparent time (given by the sun-dial), which latter had been used up to the year 1833. It must be obvious that, for all practical purposes, mean time is the most useful, and to obtain it from apparent time, the columns in the Almanac headed Equation of Time should be used. The column Equation of Time ought, for exam le, to be consulted, when persons are desirous of setting their clocks by a sun-dial. Hen clock after sun is written above the number of minutes and seconds Opposite to the day, then the clock ought to be set so much slower than the sun-dial, and the contrary. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.