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Excerpt from Practical Geometry and Engineering Drawing Two drawing pens, one for fine and the other for thick lines. Great care is required in their use and treatment. They should be held steadily and at a constant angle to the paper. The ink must be introduced between the nibs by means of a small brush or the feather of a quill pen, and as soon as it begins to thicken the points should be wiped clean with blotting-paper previous to refilling. After use drawing pens should be carefully wiped with wash-leather. Two pairs of compasses, one smaller for use as dividers only, in transferring lengths from scales, setting off distances, &c.; the other larger, with a movable limb which can be replaced at pleasure by an ink or pencil leg. These latter compasses should have needle points. In using dividers care must be taken not to make holes in the paper, a very slight indent being all that is necessary to mark a point. Two small compasses, one having a fixed pencil and the other a fixed pen leg. These are required for drawing small pencil and ink circles. Both should have needle points and jointed limbs. In drawing circles the jointed limbs of the compasses should be bent so as to stand at right angles to the paper. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This 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.
Broad appeal to undergraduate teachers, students, and engineers; Concise descriptions of properties of basic planar curves from different perspectives; useful handbook for software engineers; A special chapter---"Geometry on the Web"---will further enhance the usefulness of this book as an informal tutorial resource.; Good mathematical notation, descriptions of properties of lines and curves, and the illustration of geometric concepts facilitate the design of computer graphics tools and computer animation.; Video game designers, for example, will find a clear discussion and illustration of hard-to-understand trajectory design concepts.; Good supplementary text for geometry courses at the undergraduate and advanced high school levels
Presents an introduction to the origins and principles of geometry, describing geometric constructions that can be achieved through the use of rulers and compasses.