464 



Acoustics. 



No. 53 610 



53 610. 1 : 5. 



53 612. 1 : 3. 



53 615 an.l 53 617. I : '>. 



53 619. 1 : 



53.610. Acoustic Reaction Wheel, Figure (Fig. 5), tuned to the tone g, (so! 3 ), with glass s. d. 

 resonators, without glass vessel 0. (i. o 



53.611. - - idem, tuned to g t (so! 3 ), with spherical Aluminium Resonators 1. 0.0 



53.612. - - id e m, tuned to c 2 (ut 4 ), Figure, consisting of 4 aluminium Resonators joined 



by a light aluminium cross-piece, on stand 1. 16. o 



A tuning fork c, (ut,) with resonance box is necessary for working this apparatus. 



53.613. Resonator with 4 Apertures (Fig. 4) u. 7. n 



53.614. Glass Cylinder for the Acoustic Reaction Wheel (Fig. 5) ' 0. l.o 



53.615. Stand with Steel Pivot for setting up the rotating bodies, Figure, adjustable 0. 4.0 



53.616. Reed Pipe (Fig. 7) 1. 4. o 



The horn without reed, No. 53,622, is inserted into the aperture of the same. 



53.617. Small Paper Wheel (Wind Wheel), Figure (Fig. 8) 0. 2. 6 



53.618. Glass Resonator, arranged to float (Fig. 3) 0. (i. o 



53.619. Resonator for Tone g, (so! 3 ) with stand, Figure (Fig. 8) 0. 10. 



53.620. Massive Tuning Fork g, (so! 3 ), with resonance box 1. -'. o 



53,62.1. Sound Radiometer, consisting of four perforated sheets of paper fixed on a wood cross 



(Ztschr. f. Instrumentenkunde, 3, 1883, p. 130) . 0.6.0 



53,284. Horn, with Reed, g, (so! 8 ) (Fig. 6), see Figure 53,284, p. 429 0. -I. o 



53.622. Horn without R*ed, g, (sol,) (p. 186 and Fig. 6) 0. 3. 



53.623. Phonometer (of. Fig. 9), on stand and with tilting board 0. 12. o 



Cl. 1196.11U7. lliis. HOT. 





