Mechanical drawing; a treatise on the drawing of mechanical and machine details (1920)
Jones, Franklin Day, 1879-1967 · New York, The Industrial press; [etc., etc.] · leaf 59
ght line) so thatthe two lines will join neatly together, and that is where boththe lines are tangent to the same radius where they join. Inany other case, there will be a break or sharp place whichwill be apparent to the eye, and further, a piece made afterthe drawing will not be so strong as… … Fig. 20. Method of drawing a Symmetrical Figure requiring Right-handand Left-hand Curves on Each Side of a Center Line radial lines) which are at right angles to the tangents of thecurves at the points chosen. Figure 21 shows an irregularcurve on which radial lines perpendicular to the tangents…
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Il terzo [-qvinto] libro ... (1551)](https://img.insideoutlibrary.com/img/200/ia-ilterzoqvintolib00serl-34-52.webp)