No. 53 523. 



Resonators. Frequency Curves. 



451 



53519. 1 : 8. 



53521. 1 : 8. 



53 522. 1 : 8. 



53.517. 10 Resonators for preceding, after Helmholtz, Figure, spherical, in perfect tone, s- d. 

 for fundamental tone c = 128 compound vibrations (ut. 2 = 256 v. s.) and its first nine 

 overtones, on board, with wood pegs 5. 0. 



In this set of resonators the fundamental tone c (ut 2 ) (first partial tone) is not included. 



53.518. 14 Universal Resonators after Konig, Figure, consisting of two cylinders sliding 

 one in the other, with graduation, to be employed for all tones from g- l (solj) to e s (mi 5 ), 



the tones of the chromatic scale being indicated singly 18. 0. 



The compass of the individual resonators is as follows: (1) g_, to b-, (so^tosi,); (2) b_, to d* (sij to 

 re* 2 ; (3) d* to f* (re* 2 to fa* 2 ); (4) M= to a (fa* 2 to Ia 2 ); (5) a to c t (Ia 2 to ut 3 ); (6) c l to e t (ut 3 to mi 3 ); 

 (7) e^o a t (mi 3 to Ia 3 ); (8) aisj to d 2 (la* 3 to re,); (9) c, to e. (ut 4 to mi 4 ); (10) d 2 to f 2 (re 4 tofa 4 ): (11) e 2 i 

 to g*jj (mi 4 to sol* 4 ); (12) L, to a 2 (fa 4 to Ia 4 ); (13) g* 2 to c 3 (sol* 4 to ut s ); (14) c 3 to e 3 (ut s to mi 5 ). ! 



Demonstration of Lissajous Curves. 



* 53,519. Apparatus for Demonstrating the Lissajous Curves by Crank Motion, Figure, for 

 projection as well as for drawing the curves on blackened glass plates (Fr. phys. Techn. 1, 2, 

 Fig. 3393 [I, 494]; W. D. Fig. 234, 220), with wheels for obtaining the ratios 20, 24, 30, 

 36, 40, 48, 50, 59 and 60 : 60 4. 4. 



53.520. Kaleidophone after Wheatstone, simple, one steel bar with spherical mirror on metal 



base (M. P. I, Fig. 704, 728) 0. 10. 



53.521. Kaleidophone (Wheatstone's), Figure, with 6 rods having spherical metal mirrors, 



on iron stand with levelling screw, for producing 6 phases (M. P. I., Fig. 706 [730]) 2. 10. 



When struck, the differently shaped rods give directly the corresponding Lissajous curves The 

 figures shine well and large on the ceiling under incident light. 



53.522. Universal Kaleidophone, after Melde, Figure, with adjustable metal strips and 

 spherical metal mirror (M. P. I., Fig. 707 [731]), with screw clamp 1. 10. 



52,124. Double Pendulum after Airy, Fig. 52,124 A and B, pp. 296 and 297 1. 0. 



53.523. Pendulum Apparatus for obtaining the vibration curves of Wheatstone and Lissajous, 

 Figure (Eisenlohr, Lehrb. d. Phys., Fig. 181) 1.16.0 



* Can be used with the Projection Apparatus. 



Cl. 5842, 



6032, 6008, 4014. 29* 



