No. 53232. 



Blowing Tables and Bellows. 



425 



53 232. 1 : 15. 



53.221. Blowing Table for Acoustic Experiments, Figure, with two large and four small s. d. 

 tube attachments with valves | 7. 0. 



The Blowing Table has a large valve for receiving large reed pipes, a tube attachment with plug 

 seal for the overtone apparatus or a special wind chest; four valves for sirens and pipes, and two 

 tube unions of different sizes with plugs, for various purposes. The table frame is constructed of pine, 

 the top of oak. 



53.222. - - idem, with eight valves, otherwise as No. 53,221 8. 0. 



53.223. - - idem, with thirteen valves, otherwise as No. 53.221 9. 0. 



53.224. Blowing Table with Wind Chest and Keyboard, Figure, for all acoustic experiments; 

 with a large valve for a large reed pipe or a tonometer; with eight small valves and two 

 different pipe attachments for rubber tube connections. The valves are opened by 



a keyboard which can be regulated and fixed in place. Size of bellows 37 X 57 cm |15. 0. 



63.225. - - idem, with twelve valves 18. 0. 



53.226. Blowing Table with Electric Motor Drive, Figure, with 110 volt D. C. Motor, with 



fuse, switch and starting resistance, in lock-up cabinet with doors 24. 0. 



With two large conical pipe attachments with plug seals, for taking tonometers and overtone 

 apparatus; a large valve for large reed pipe; four valves for sirens and pipes and two hose unions of 

 different sizes with plug seals, for various purposes. The table frame is of pine, the top of oak. 



53.227. - - idem, with eight valves 25. 0. 



53.228. - - idem, with thirteen valves 26. 0. 



53.229. Blowing Table for Constant Pressure, Figure, specially adapted for use in ex- 

 periments with tone variators Nos. 53,481 et seq., for continuous experiments with 

 Galton's whistle, Quincke's tubes, etc. Price without tone variators 9. 0. 



53.230. Double Blower, after Whipple, for constant pressure, Figure, with two wind 

 chambers arranged as gasometers. The chambers are employed alternately, the transfer 



being made quite easily {22. 0. 



The blower gives a very uniform wind both when the chamber is filled and empty. The in- 

 fluence of the alteration in water level on the height of pressure is compensated by efficient arrange- 

 ments. The pressure can be regulated. A Stern Tone Variator can be supplied with air for about 

 2 5 /2 minutes without interruption. 



r>.'),231. Wind Chest on Table, with four small and three large valves, cf. F i g. 53,506, for 



use with the Whipple Double Blower No. 53,230 | 7. 10. 



53,232. Acoustic Bellows, Figure, with four valves and a pipe attachment for taking 



reed pipes j 4. 10. 



01. 3371, 5995. 



