Essentials of drafting; a text and problem book for apprentice, trade and evening technical schools (1918)
Svensen, Carl L. (Carl Lars), 1884- · New York, D. Van Nostrand company · leaf 148
/^/^. S08 Fig. 309 on the actual cube. For drawing purposes the lines BD, BC,and BA, etc. are made the same length as on the actual cube.The angles formed by the three lines which meet at point B areequal to 120° each. The three Unes are called the isometric axesand form the basis for isometric… … rig. 3/0
Mechanical drawing
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