Elementary projection drawing. Theory and practice. For preparatory and higher scientific schools, industrial and normal classes; and the self-instruction of teachers, inventors, draftsmen, and artisans. In six divisions .. (1880)
Warren, S. Edward (Samuel Edward), 1831-1909 · New York, J. Wiley & sons · leaf 82
CHAPTER H. OONSTEITCTIONS IN WOOD § I.— General Remarks. 80. Two or more beams may be framed together, so as to makeany angle with each other, from 0° to 180° ; and so that the planeof two united pieces may be vertical, horizontal, or oblique. 81. To make the present graphical study of framings…
Geometrical drawing · Mechanical drawing
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