Sullivan, Christine [Gordon]. [from old catalog] · New York, Cincinnati [etc.] American book company · leaf 18
Fig. 18. … Fig. QUESTIONS FOR CLASS EXERCISES. It is advisable to have a number of pupils, six or eight, at work atthe blackboard ; the remainder of the class preparing the exercisesat their desks. 14 ELEMEXTS OF MECHANICAL DRAWING, Exercises in Drawing Horizofital Li7ies. 1. Define the term horizofital. 2.…
Mechanical drawing
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