Sound : an elementary text-book for schools and colleges
An elementary physics textbook on sound by John Walton Capstick, issued in 1913 for school and college students. The 22 plates are plain black-line geometric diagrams: labeled circles and annular rings traced with chords and arrows, expanding wavefronts meeting a reflecting line, and a sine curve plotted from a spoked circle on a numbered grid, usable as ready-made technical line art, ruled construction grids, and lettered point notation.
