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eighth. Lines 9-16 are at the bottom in the middle. The remainder of
the text is at the side of the drawing at the bottom.]
A square drum of which the parchment may be drawn tight or slackened
by the lever a b [5].
A drum for harmony [6].
[7] A clapper for harmony; that is, three clappers together.
[
9] Just as one and the same drum makes a deep or acute sound
according as the parchments are more or less tightened, so these
parchments variously tightened on one and the same drum will make
various sounds [16].
Keys narrow and close together; (bicchi) far apart; these will be
right for the trumpet shown above.
a must enter in the place of the ordinary keys which have the ...
in the openings of a flute.
1
130.
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
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