A New Library of Poetry and Song

Read Books, 2007 - 616 páginas
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. 1902 Excerpt: ...earth. r' = radius of moon, or other body. P = moon's horizontal parallax = earth's angular semidiameter as seen from the moon. f = moon's angular semidiameter. Now = P (in circular measure), r'-r = r (in circular measure);.'. r: r':: P: P', or (radius of earth): (radios of moon):: (moon's parallax): (moon's semidiameter). Examples. 1. Taking the moon's horizontal parallax as 57', and its angular diameter as 32', find its radius in miles, assuming the earth's radius to be 4000 miles. Here moon's semidiameter = 16';.-. 4000::: 57': 16';.-. r = 400 16 = 1123 miles. 2. The sun's horizontal parallax being 8"8, and his angular diameter 32V find his diameter in miles. ' Am. 872,727 miles. 3. The synodic period of Venus being 584 days, find the angle gained in each minute of time on the earth round the sun as centre. Am. l"-54 per minute. 4. Find the angular velocity with which Venus crosses the sun's disc, assuming the distances of Venus and the earth from the sun are as 7 to 10, as given by Bode's Law. Since (fig. 50) S V: VA:: 7: 3. But Srhas a relative angular velocity round the sun of l"-54 per minute (see Example 3); therefore, the relative angular velocity of A V round A is greater than this in the ratio of 7: 3, which gives an approximate result of 3"-6 per minute, the true rate being about 4" per minute. Annual ParaUax. 95. We have already seen that no displacement of the observer due to a change of position on the earth's surface could apparently affect the direction of a fixed star. However, as the earth in its annual motion describes an orbit of about 92 million miles radius round the sun, the different positions in space from which an observer views the fixed stars from time to time throughout the year must be separated ...

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Referencias a este libro

 Three Voices from Paumanok: The Influence of Long Island on James Fenimore ...Joan D. BerbrichVista de fragmentos - 1969

Acerca del autor (2007)

Like so many successful New Yorkers during the nineteenth century, William C. Bryant was born and reared in New England. There, in his native Massachusetts, among the beautiful highlands of the Berkshires, he learned early to be a close observer of nature and a careful student of English versification. A child prodigy, he began to make rhymes before his tenth birthday, and in 1808 he gained some fame as the author of The Embargo, or Sketches of the Time, a satire in verse in which he echoed the conservative political sentiments of his elders. Soon, however, he found his own voice and point of view, and the poetry that followed, unlike so much of the literature that was being produced in the United States in the early decades of the nineteenth century, was considered by his contemporaries to be unmistakably American. During his own lifetime and since, his most famous poem has been "Thanatopsis" (from the Greek thanato and opsis, meaning "a meditation on death"), which was first published in the North American Review in 1817. Other poems, such as "Inscription for the Entrance to a Wood" (1817), "A Forest Hymn" (1825), and "To the Fringed Gentian" (1832), printed during the next several decades, brought him recognition both at home and abroad as the leading poet in the United States. Always solemn and stately, his verse seemed cold to James Russell Lowell, who humorously spoke of Bryant's "iceolation." But others praised Bryant for his careful artisanship, his commitment to romantic aesthetics, his celebration of nature, and his liberal faith in the historical destiny of the United States. Matthew Arnold called "To a Waterfowl" (1818) one of the finest short lyrics in the English language, and "The Prairies" (1833) and "Earth" (1835) have been seen as noble literary expressions "of the Jacksonian version of the American Dream." By training a lawyer and by profession a journalist, Bryant was editor-in-chief of the New York Evening Post from 1829 until his death in 1878. This position gave him enormous influence on national affairs, and his early support for the fledgling Republican party in the 1850s helped insure that party's success. When he was nearly 80 years old, he translated the Iliad and Odyssey of Homer into English blank verse. Bryant died in 1878.