Items related to Linear drawing; an introduction to technical drawing
Synopsis
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. 1874 edition. Excerpt: ... and with a radius of two-thirds of fe or fc, meeting those previously drawn. The outer ares of the serpentine band must be drawn from the same centres at a distance from the inner equal to the width of the zigzag band. In describing the circles of the outer border of the table, make the distance x n equal to the width of the serpentine band m m, and n o equal to half of x n, and lastly o p, again equal to x n. PLATE XVIII.. Figubk 64.--Design for an embossed book or album cover. Make the rectangle A B C D, with a length of 43, and a width of 28 equal parts of, say a quarter of an inch each, and number the divisions as on the plate. Through the points 8 draw g g parallel to the sides of the rectangle, forming, by their intersection, the inner rectangle e e e e. Through the points 14 in A D and B C, and through 21J in A B and D C, draw the lines E F and G H, making the latter of any indefinite length. Through 6 draw the four lines a a intersecting E F in b b, and G H in c c; the distance 6 b will be the length of the major axis, and the distance c c, the length of the minor axis of the large oval, which must be constructed according to directions for figure 27, Plate IV. The divisions of the line b b into 6 equal parts are lettered o, d, d, r, r, corresponding to E, a, a, 1, 1, of figure 27. The smaller oval in the centre is to be constructed according to directions for figure 22, Plate IV.; its larger axis//, corresponding with A B, its smaller one d d, with D C, its centres m, m with 1,1, and the centres n, n with 2, 2. For the construction of the circles, make the distances b h equal to c f, and the radius r h is obtained. The sides of the triangular figures z z z must be drawn parallel to the ovals and circles respectively, at a distance from...
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