Disk No. 3 has--

Distances.

On circle No. 1 24 holes, distances 15°

" " 2 24 " " 15° & 27 holes, 13-1/3°

" " 3 24 " " 15° " 30 " 12°

" " 4 24 " " 15° " 32 " 11-1/4°

" " 5 24 " " 15° " 36 " 10°

" " 6 24 " " 15° " 40 " 9°

" " 7 24 " " 15° " 45 " 8°

" " 8 24 " " 15° " 30, 36, & 48 holes

Circle 1 produces a single note, circle 2 a second, circle 3 a third,

circle 4 a fourth, 5 a fifth, 6 a sixth, 7 a seventh, and 8 a perfect

chord.

Scientific American Supplement, No. 401, September 8, 1883 · 第 35 / 67 题