Tyndall, John, 1820-1893 · London : Longmans, Green · leaf 73
that you may readily count them. Buta mass of metal differently shaped may be caused to * Galileo, finding the number of notches on his metal to be great -whenthe pitch of the note -was high, inferred that the pitch depended oo therapidity of the impulses. E 2 52 LECTURE II. vibrate more briskly,… … pressed against the lead, the vibrations are rendered morerapid, and the taps link themselves together to a deepmusical tone. A second rocker, which oscillates morequickly than the last, produces music without any other Fig. 17.
Sound
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