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 ...

Mojave Desert Trails explores some of the most interesting historic and geological sites in the Mojave Desert. Ecologically and environmentally diverse, the Mojave Desert encompasses a dramatic and enchanting landscape of ancient volcanic cinder cones, Joshua tree forests, sand dunes and rugged mountains. Weather in the Mojave changes as dramatically as its terrain: triple digits from late spring to early fall with winter temps often dropping below freezing. A wet winter, with both rain and snow, will prepare the Mojave Desert for a spectacular display of spring flowers.

This edition of our Trails series contains detailed backcountry trail information for 51 offroad routes located near the towns of Lone Pine (east), Panamint Springs, Death Valley area, Ridgecrest, Barstow, Baker and Blythe. NEW, full COLOR addition to our Trails series! These handy 6x9? books include scenic drives plus a whole lot more! Including some of America's best mountain biking, hiking, camping and fishing areas! Ghost towns galore? Step back into the past while wandering through abandoned mining areas, old buildings, and even entire towns. INCLUDES GPS coordinates throughout each book.

Presents 65 desert trips from Bishop to the Mexican border, including expanded coverage of popular destinations such as Death Valley National Park, Mojave National Preserve, and Anza-Borrego Desert State Park. This book makes high-walled canyons, lonely ghost towns, and soaring peaks from Mexico to the Great Basin easily accessible to recreational drivers. Tony Huegel's glove-box-sized Byways have been leading drivers to the hidden surprises found along unpaved backroads for more than 10 years. These books are for recreational drivers who want to use their four-wheel-drive or sport-utility vehicle beyond the pavement to explore, but who might not want to do hard-core or lengthy off-road driving. They are also for adventurers who use these trips as jumping-off points for muscle-powered exploration, such as hiking and mountain biking.

Backpacking California is a collection of more than 70 of the most intriguing backpacking adventures in Wilderness Press's home territory of California. With contributions from more than a dozen Wilderness Press authors, the book describes routes ranging from one night to one week. Backpacking novices as well as "old hand" California hikers will find expert-crafted trips in the Coast Ranges, the Sierra, the Cascades, and the Warner Mountains. Expanded coverage includes trips in Big Sur, Anza-Borrego, Death Valley, and the White Mountains. Several trips have been described in print nowhere else. Each trip includes a trail map and essential logistical information for trip planning.

Field guide to the gems and minerals of the Mohave and Colorado Deserts. Includes maps and photos.