428 



Acoustics. 



No. 53260 



53260. 

 1 : 9. 



53261. 

 1 : 10. 



53263. 1:11. 



53262. 1:10. 



53 265. 1 : 8. 



53266. 1 : 13. 



A B 

 53 267. 1 : 8. 



53.260. Labial Pipe with adjustable membrane, for showing the vibratory nodes, Figure, s - d. 

 of wood, with glass wall 0. 16. 



53.261. Labial Pipe with adjustable membrane, Figure (M. P. I, Fig. 653 [687]), for 

 showing the vibratory nodes, with long glass tube 1. 0. 



53.262. Labial Pipe with long glass tube and sliding piston, Figure 1. 4. 



When the piston is in a vibratory node, the fundamental tone of the pipe is maintained, while 

 in the other case it is altered. 



* 53,263. Manometric Flame Pipe, after Konig, Figure, with three gas flame manometers, 

 for demonstrating the nodal points, with glass wall and brass fittings, also with sheet 

 iron inset so as to be able to project the phenomenon in reflected light by means of soap 

 bubbles (W. D. Fig. 209 A [195 A]) 1.16.0 



The pipe is placed on the small table supplied with our Projection Lanterns. The objective, 

 however, must be set up, at right angles to its usual position, alongside the projection lantern, at a 

 corresponding height, e. g. on one of the small tables Nos. 51,133 4, 51,136 7, or 51,139 40. Tilt- 

 projection lantern itself is set up parallel to the screen. The optical bench is then unscrewed, tin- 

 lantern alone rotated, and the pipe, with the objective, placed on the optical bench (cf. W. I). 

 Fig. 210 [196]). 



53.264. -- idem, with Topler's Flame Indicators (W. D. Fig. 209 B [195 B]) L. 12. fl 



53.265. Kundt's Covered Pipe, Figure, with 3 Water manometers and valves seals . . 2. s. o 



53.266. Labial Pipe, Figure, in the nodes of which holes of different diameter can be 

 opened 0. 16. 



53.267. 2 similar Labial Pipes, Figs. A & B, with mouthpieces in different directions, for 

 showing that the position of the mouthpiece is without influence on the tone ... 1. -4.0 



53.268. 2 Labial Pipes, Figure, the open ones giving the tones, 1, 2, 3, 4, the closed ones 



the tones 1, 3, 5, 7; with directions for use 1. TJ. n 



53.269. Open Pipe, of boxwood (Fr. phys. Techn., 6 lh Edn., II, Fig. 977), for showing tlmt 

 higher tones can be produced in a narrow pipe by intensified blowing; without wind 

 chamber 0. S. 



53.270. Cubic Pipe with adjustable wall, Figure 0.16.0 



53.271. Cubic Labial Pipe, open 0. 12. o 



53.272. 2 Closed Cubic Pipes, of different size, Figs. A and B, for demonstrating I lit- influence 



of the volume of air on the tone 0. 16. 



53.273. 2 Covered Triangular Prismatic Labial Pipes, for the same law 0. 16. 



Cl. 5982, 



* Can be used with the Projection Apparatus. 4978, 1089, 1000, 5989, 5976, 5077. 



