Practical engineering drawing and third angle projection, for students in scientific, technical and manual training schools and for ... draughtsmen .. (1897)
Willson, Frederick Newton, 1855-1939 · Princeton, N.J., The author · leaf 131
the fourth equalsIF 6 in the second. The fourth elevation is a view in the direction of arrow No. 5, giving the equivalent of a ninety-degree rotation of the object from its last position. To obtain it take a reference line r r throughsome point of the second plan, and parallel to OR,; then R R… … THE DEVELOPMENT OF SURFACES. 405. The developjment of surfaces is a topic not altogether new to the student who has readChapter V and the earlier articles of this chapter;* so far, however, it has occurred only incidentally,but its importance necessitates the following more formal treatment, which…
Mechanical drawing · Lettering
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