FIG. LIST OF ILLUSTRATIONS. 1.-Vibrations of Stretched String. 2. Harmonic Sounds. Nodes and Ventral Segments of a Vibrating String . 3. Harmonics. Nodes and Ventral Segments of a Vibrating String 4. Sonometer 5.-Longitudinal Vibrations of Rods. 6. Marloye's Harp 7.-Vibrations of a Metal Rod. 8.-Nail Fiddle. 9.-Zanze 10. Marimba 11.-A Tuning-fork mounted on a Sounding-box. 12. Vibrations of a Plate. 15. 16. 17. 13. Nodal Lines of Vibrating Circular, or Polygonal Plates, according to Chladni and Savart. 14.--Nodes and Segments of a Vibrating Bell Section of a Bell Proof of the Vibration of a Glass Bell, Striking Reed 18.--Free Reed 19.-Egyptian Flute 20.-Prismatic Sonorous Pipes b FIG. 21.-Cylindrical Sonorous Pipes 22.-Trevelyan's Instrument. 23. 99 Cause of Vibratory Movements. 24-Philosophical Lamp or Chemical Harmonicon . 25.-Kundt's Tube . 26.-Experimental Study of the Laws of Reflection of Sound 27.-Sonorous Refraction. M. Sondhauss's Instrument 28.-Propagation of a Sonorous Wave through an Unlimited Medium 29.-M. Helmholtz's Resonance Globe 30.-Beats of Imperfect Unison. Ordinates of Ten Waves. 31.-Ordinates of Eleven Waves transmitted in the same time. 32. Sums of the Corresponding Ordinates 33.-Savart's Toothed Wheel 34.-Seebeck's Siren 35.-Cagniard de Latour's Siren . 36. Interior View of the Siren 37.-Helmholtz's Double Siren 38.-Vibroscope. 39.-Combination of two Parallel Vibratory Movements. 40.-Vibrations of Compound Sounds . . 41.-Optical Study of Vibratory Movements 42.--Optical Curves representing the Rectangular Vibrations 43.-Combination of Two Rectangular Vibratory Movements 46.-Apparatus for the Comparison of the Vibratory Move- 47. Manometric Flames. Fundamental Note, and the Octave |
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