Other editions of book An Elementary Treatise On Astronomy: In Two Parts. the First Containing, a Clear and Compendious View of the Theory; the Second, a Number of Practical ... Solar, Lunar, and Other Astronomical Tables

This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Excerpt from An Elementary Treatise on Astronomy: In Two Parts; The First Containing, a Clear and Compendious View of the Theory; The Second, a Number of Practical Problems, to Which Are Added, Solar, Lunar, and Other Astronomical TablesIn a work of this description, particularly when printed from manuscript, errors must be expected to occur; some proceeding from inadvertencies on the part of the author, and others occurring in the press. Such as have been discovered, which, it is believed, include all that are im portant, are enumerated at the end of the volume.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

This book was originally published prior to 1923, and represents a reproduction of an important historical work, maintaining the same format as the original work. While some publishers have opted to apply OCR (optical character recognition) technology to the process, we believe this leads to sub-optimal results (frequent typographical errors, strange characters and confusing formatting) and does not adequately preserve the historical character of the original artifact. We believe this work is culturally important in its original archival form. While we strive to adequately clean and digitally enhance the original work, there are occasionally instances where imperfections such as blurred or missing pages, poor pictures or errant marks may have been introduced due to either the quality of the original work or the scanning process itself. Despite these occasional imperfections, we have brought it back into print as part of our ongoing global book preservation commitment, providing customers with access to the best possible historical reprints. We appreciate your understanding of these occasional imperfections, and sincerely hope you enjoy seeing the book in a format as close as possible to that intended by the original publisher.

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. 1822 Excerpt: ...of the expression, that we obtain a near value of /3, if the terms, in which they enter, are omitted. Hence by taking, a Eu x G», E'tt' + GV we obtain a very near approximate value of P. Then, taking n = uP, « = rP, IT = u'P', and «.' = «'P, and again calculating the values of £ and we obtain the correct value of P. 49. If v = the sun's borozontal parallax at the time of the transit, being the mean parallax, and V the radius vector, we have «.' =.y » At the time of a transit, the latitude of Venus is so small that we may consider its sine as equal to its tangent, and its cosine = 1. Hence 35), v. sin. 2 J,o«n T_,and(37), a-sin A v v. sin I V--v wv 50. The transit of 1769 was observed at.Wardhus, a small island on the north coast of Europe, and at Otahcitc in the South Sea, and the duration was found to be longer at the former place, than at the latter, by 23 m. 10 sec. The sun's mean horizontal parallax, determined from the observations, made at those places, is 8".7-From observations made at other places, results a little different were obtained. By taking the mean of the results deduced from the most accurate observations, astronomers have fixed the parallax at 8".6 or 8".7j some adopting one number, and some the other. 51. Taking the sun's parallax 8".7, the earth's mean distance from the sun is 23708 semidiameters of the earth (5 8), or 94.000,000 English miles, nearly. Thence, from the sidereal revolutions of the earth and.Venus, the mean distance of Venus from thesun, found by Kepler's third law (7'30), is 68 millions of miles. From the, observed diameter of Venus, when at a known distance from the earth, its real diameter is easily found. It is about 7600 miles. 62. It is found that Venus re...