414 



Wave Motions. 



Nc,. :,3155 



53161. I:.", 



53155. 



53 162. 1 : 40. 



53164. 1 : 12. 



53 166. 1 : 9. 



53,155. Rope Wave Apparatus after Volkinann, Figure (Fr. phys. Techn. I, 2, Figs. 3426, 

 3436, 3437; Ztschr. ,,Natur und Schnle", Vol. I, pp. 273282 and pp. 342350), for 

 demonstrating the propagation, reflection, interference and polarisation of simple waves 

 and trains of waves, the influence of the cord tension and of the cord weight on the 

 wave-velocity, and of the compensation of waves of opposite phases 2. 5. o 



The apparatus consists of two end supports with hooks, 1 swinging lever for interference experi- 

 ments. 2 polarisers, and 18 wire spirals. In addition, 3 to 4 stands are necessary for the experiments 

 and are not included in the price: it is also advisable to provide stand clamps. 



53,15*!. 4 Stands for Yolkmann's Eope Wave Apparatus J. I), it 



53.157. 4 Stand Clamps for preceding Stands 1. o. o 



53.158. Indiarubber Cords for transverse waves. 3 m long (\Y. 1). p. 244 |217'J) 0. 3. 



5.").I.V.t. -- idem, weighted for half their length with wood balls 0. 12. 



53,lfi(. Brass Wire Spiral on Silk Fibre, for reflection of transverse waxes (\V. I), p. 245 |218]) 0. 5. o 



53. Hil. Brass Wire Spiral with Steel Rod for clamping, Figure (.M. T. pp. Sti and 87). 



for generating transverse and longitudinal waves 0. 2. 



53.1<>2. Apparatus after Rosenberg, Figure, for demonstrating the propagation and inter- 

 ference of oscillatory motions , 0. 12. 



The apparatus consists of a long metal wire to which small wood pieces of square section are 



fixed at ecpial distances apart, these piece,s being of eqiuil length. 



OL 3363.4516. 1031, 

 1036, 1037. 



