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. 1907 Excerpt: ... section at EE. There is nothing shown by this section which is not evident from a study of the contour-lines. On the contrary the contour-iines show the exact shape of the hill better than the section From the latter, one might suppose the ground to run in the form of a ridge, but from the contours it is seen to be a ...
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. 1907 Excerpt: ... section at EE. There is nothing shown by this section which is not evident from a study of the contour-lines. On the contrary the contour-iines show the exact shape of the hill better than the section From the latter, one might suppose the ground to run in the form of a ridge, but from the contours it is seen to be a coneshaped MIL Question. If the hill were a perfect cone, would the contour-lines be perfect circles with a common center? 399. Contour-lines, Fundamental Principles. 1. All points on the same contour-line have the same elevation. 2. Two contour-lines of different elevations cannot cross each other. If they did, the point of their intersection would have two different elevations, which is absurd. (How can an overhanging cliff or a cave be an exception to this rule?) Contourlines of different elevations sometimes appear to merge in one line as in the case of a vertical cliff. 3. Two different contour-lines of the same elevation cannot merge and continue as one line. For the single line would indicate a knife-edge ridge or depression, something which does not occur in nature. Different contours of the same elevation, 'however, often approach very near to each other. 4. Contour lines near together indicate a steep slope, --far apart a gentle slope, --equally spaced a uniform slope. It is evident that the horizontal distance between successive contourlines indicates the rate of slope. 5. A contour passing through any point is perpendicular to the line of steepest slope at that point. This agrees with (4), since the perpendicular distance between contour-lines is the shortest distance. Ridge and valley lines cross contours at right angles, 6. A closed contour-line with one or more higher ones inclosed indicates a hill Fig. 398); with one or more lowe.
Fair. John Wiley 1906 1st edition cloth softcover, worn edges beginning to fray, gilt lettering on spine, gilt edged pages, water stain bottom corner inside cover and front end page, tight binding, good foldout chart, 1 loose diagram from book? , name inside, clean text Prompt, reliable service, shipped next business day. Int'l mailed via first class or priority.
Used; Good. Flexible boards, Gilt on all edges. 794 pages including illustrations, tables diagrams folded map, folded diagrams 18 cm. 12/34 on copyright page. A few (very few) pencil margin marks observed. Binding tight and square. Gently used.
12 mo., hardcover, burgundy treated boards, gilt lettering on spine. All page edges in gilt. Corner wear and spine extremities chipped, front hinge cracked else VG. 794 pp. b/w line drawings; fold-out isogonic chart of US for 1905; tables of tangents, sines, cosines etc.
Very Good. B0031RBKUI Clean, unmarked copy with some edge wear. Good binding. Dust jacket included if issued with one. We ship in recyclable American-made mailers. 100% money-back guarantee on all orders.
B/W Illustrations. Very Good. 7" x 4 3/4" (2) xxvii, 794 pp. Indexed. Fold-out chart ca 1920 in fine condition. Age-toned contents are clean and complete. End pages have prev. owner i.d. and date stamps. Boards are in very good condition with gold, gilt lettering and light shelf rubbing at spine ends and corners. Technology. Enineering.
Good. Reference. 12mo-over 6¾"-7¾" tall. This book is in good condition. The interior is clean. Isogonic Chart of the United States included. 3rd printing, total issue of 78, 000. The boards are black with the lettering in gold on the spine. There is creasing on the covers, probably from being in a pocket! There are two names and a date on the first page.
Alibris, the Alibris logo, and Alibris.com are registered trademarks of Alibris, Inc.
Copyright in bibliographic data and cover images is held by Nielsen Book Services Limited, Baker & Taylor, Inc., or by their respective licensors, or by the publishers, or by their respective licensors. For personal use only. All rights reserved. All rights in images of books or other publications are reserved by the original copyright holders.