A mechanical drawing board.
A mechanical drawing board with t-square.
Drawing board with t-square and two triangles.
To fasten the paper, lay a sheet on the board with the left edge an inch or so from the ending, place…
Using a drawing board and pairs of triangles to draw parallel lines.
Side view of a hand drawing on a mechanical drawing board.
A hand demonstrating inking parallel lines using a t-square and a drafting board.
Drawing perpendicular lines using a drawing board and pairs of triangles.
Do not hold the pen over the drawing while filing. Keep the blades parallel to the direction of the…