Industrial drawing and geometry; an introduction to various branches of technical drawing (1911)
Spooner, Henry John, 1856- · London, New York [etc.] Longmans, Green, and co. · leaf 20
he two dimensions 24 and 17 signifies multiplication or the word hy.Thus the above would read, 24 inches by 17 inches, one dimension being multiplied by the other giving the area of the board. - The sufSx () signifies degrees: thus 15° reads—15 degrees. Degrees are divided for measuring purposes… … Fig. 1.—Battened draw-ing board.B 0^^ 2 INDUSTRIAL DRAWING AND GEOMETRY rough use in a school, but the raahogauy ones, with the workhig edges of ebony, are generally used for office work, and shouldalways be used by those who can afford them. An enlarged section of the ruling edge is shown at A on…
Mechanical drawing · Geometrical drawing
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