1130.
Tymbals to be played like the monochord, or the soft flute.
[6] Here there is to be a cylinder of cane after the manner of clappers with a musical round called a Canon, which is sung in four parts; each singer singing the whole round. Therefore I here make a wheel with 4 teeth so that each tooth takes by itself the part of a singer.
[Footnote: In the original there are some more sketches, to which the text, from line 6, refers. They are studies for a contrivance exactly like the cylinder in our musical boxes.]
1131.
Of decorations.
White and sky-blue cloths, woven in checks to make a decoration.
Cloths with the threads drawn at a b c d e f g h i k, to go round the decoration.
XIX.
Philosophical Maxims. Morals. Polemics and Speculations.