Merchant, F. W. (Francis Walter), 1855-1937, Chant, Clarence Augustus, 1865-1956 · Toronto : Copp Clark · leaf 203
his assumed, and the note is higher than the former. Bydamping with two finger-tips the form c is obtained and amuch higher note is produced. The sand is tossed away from certain parts of the surfaceand collects along the nodal lines, that is, those portions whichare at rest. Some of the forms… … Fia. 221.—Sand-flgures showing nodal lines invibrating plates. VIBRATIONS OF AIR COLUMNS : RESONANCE 193
Physics
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