Synopses & Reviews
Isometric Drawing; A Treatise On Mechanical Illustrating Dealing With Typical Constructions And Outlining; A Course In The Art - 1911 - PREFACE - THE writer has been a teacher of mechanical drawing since the year 1895 during this time it has been his privilege and pleasure to instruct many students. As a part of the course administered, each student has been given some instruction and practice in Isometric Drawing this practice has been limited, because of lack of time to devote to it most of the time assigned being given to straight mechanical drawing, but has always been of interest to, and appreciated by, the student. Isometric Drawing is growing in popular usefulness, and one can hardly pick up a technical paper or magazine without. finding one or more examples its convenience and its aclaptability are being recognized, and a knowleclge of its execution is desirable and necessary for all draughtsmen. All treatments of the subject known to the writer accompany a treatise on Descriptive Geometry, or are too short in every case the subject is treated with more attention to theory than to its practicability. The broad fielrl for its use, its growing popularity, the enthusiasm with which a student takes hold, and the nature of the present known to the writer tests on the subject have led the writer to believe that a plain exposition of the How of the art, with no reference to the TThy, may be of some service to teachers, students, and draughtsmen. It is, therefore, with the object of presenting the subject in a new light or way, in the hope that others may find the art as useful as the writer has found it, in the hope of service, and not in the nature of a This is better than thinespirit, or in criticism of what has been written, that this work is offered. A. P. JAJIISON. PUBDU U E S IVERSITP, VEST LAFAYETTE I, s D., June 13, 1911. v CHAPTER I PRELIJIISARYD ISCUSSIOS d S D EXPLAXATIOSS SECTlOS PAGE 1 . Introductory ................................................. 1 2 . Dehitions ................................................... 1 . 3 . Usesofthe Art .......................... ..................... 3 4 . Timeelement ................................................. 8 5 . Characteristics ................................................ 9 6. Toolsused .................................................... 10 i . Center lines and axes .......................................... 11 S . Flexibility .................................................... 12 CHAPTER I1 9 . To draw a square ............................................. 16 10 . Todrawahexagon ............................................ 16 11 . To draw an octagon ................. .-. ......................... IS 12 . To draw any polygon .......................................... 19 13 . To draw a circle ................................................ 2 0 1 a First method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 . 6 Second method .......................................... 22 c Error of the first method ................................. 22 4 To draw an inscribed hexagon ............................. 24 e To draw a circumscribed hexagon .......................... 24 To draw a series of circles ................................. 23 14 . To draw an ellipse ............................................. 26 l5 . To draw an hyperbola......................................... 27 16 . To draw a parabola ............. .........................