Estimating Lines using Pencil

| View Cart ⇗ | Info

“Holding the pencil in a plane perpendicular to the line of sight, marking with the thumb the length of pencil which covers a line of the model rotating the arm, with the thumb held in position, until the pencil coincides with another line, and estimating the proportion of this measurement to the second line.” —French, 1911

Source

French, Thomas E A Manual of Engineering Drawing for Students and Draftsmen (New York, NY: McGraw-Hill, 1911)

Downloads

TIFF (full resolution)

1757×2400, 373.4 KiB

Large GIF

749×1024, 67.0 KiB

Medium GIF

468×640, 35.7 KiB

Small GIF

234×320, 13.3 KiB