Practical draughtsmen's work, with numerous engravings and diagrams (1903)
Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 23
of which the T-squares are made, itwill be found difficult to prevent it warping, and care should betaken to keep the squares in a place free from damp or exces-sive heat. The working edges of the butt and blade should befurnished with narrow strips of ebony slightly bevelled on theupper side. Some… … 14,—Top View of T-sqaare. use two set squares with which to draw lines at an angle. TheT-square must be worked on the left-hand edge of the drawing-board, and it should be used for drawing horizontal lines only ;the perpendiculars being always drawn by a set-square workingagainst the T-square. A…
Mechanical drawing
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