CONTEN T 8.

their Use in Measuring D islands , - • • 244

the Depth of a Well* ibid., 245

the Nature and Theory of Otacoustic Instru- *raents, 242—*-246

Of the Stentorophonic Tube, or SpeakingTrumpet, . 247—250

GROUNDS of MUSIC,

Of the Nature of the Note, Tone, or ■ Tuneof Sounds, 248—^250

O/ the Magnitude, Length, and Tension of■ Musical Strings, 251—-255

Mathematical Calculations relating thereto ,

256—260

Of the Nature of the Spinet or Harpsichord,

252

--—————— of the Flute , Organ , &c. ibid.

. . .. of Concords and Discords,.

253

Of the Diatonic Scale, and its Divisions ,

254

Of the Greater and Lesser Notes of Music,

254> 255-

Of Melody and Harmony, 055