scale.eps (source link in file list below) : Scale Slide-Rule -- shows a scale as horizontal lines, acoustically spaced. This is intended to be printed as a full page, cut in two pieces, folded & interlocked, so that any two intervals in the scale can be compared visually (by sliding one by the other). Optionally includes an equal-tempered scale for comparison.

Variation

Here is another example of the use of this file: 

scale2.eps : another Scale Slide-Rule -- this example compares 16-tone harmonic scale to 22-tet, with labels on the 22-tet dotted lines and without the vertical cut & fold lines.