No. r>3436. 



Accessories for Tuning Forks. Monochords. 



441 



53431. 1:15. 



53434. 1 : 9. 



53436. 1 : 10. 



53,428. Monochord. smaller and simpler, with two strings stretched from pegs 



53,429. Monochord with 4 Strings, two stretched by pegs and two by weights , F i g u r e, 



on iron legs 



53.430. 4 Iron Weights with Hooks, 20, 10, 5 and 1 kg, for stretching the centre strings (W. D. p. 279 [253]) 



If the above Monochords are desired to be divided in millimetres the price is increased by 0. 15. 

 each. 



53.431. Monochord for School Use, after Hahn, Figure (Halm, Schiileriibungen Fig. 155), 

 with spring balance and striking hammer 



53.432. Tuning Fork for above, with groove in the base of the fork handle, c, = 256 compound vibrations 

 (ut 3 = 512 v. s.) 



.Vi.433. idem, d l = 288 compound vibrations (re 3 = 576 v. s.) . 



53,434. Polychord after Antolik, Figure, with 12 strings, iron frame and stretching device 



Two metal rails are arranged laterally on the iron frame of the Polychord, and clamps can be 

 slipped along the rails. Each clamp has a compression cheek with the aid of which the lengths vibrating 

 ran be shortened to any extent. Tne length is read off on two metal rules. Trie apparatus can be. used 

 advantageously for forming musical scales. See: Tonleitersystem von Prof. Dr. Karl Antolik, Pressburg, 

 and Ztschr. f. d. phys. u. chem. U. 4, 1890/91, p. 177). 



53,435. 10 Riders of Aluminium Wire, after Antolik, for the Monochord 



s. d. 

 0. 15. 



3. 0.0 

 1. 2. i) 



0. 12. 



0. 10. 



0. lo. o 



20. 0.0 



0. 1. 



53,43(>. Monochord after Zahlbruckner, Figure, with two strings, with tension indicators. 



Can be used also as a Tensile Apparatus to 50 kg pull, for metal wires, etc. With 4 bridges |17. 0. 



The two metal strings are connected at one end with spring dynamometers for 50kg tension and at the 

 other end with stretching devices actuated by worm gearing. The tensive forces exerted on the dynamo- 

 meters can be read off on a scale. In order to render the measurements accurate the bridges are lifted 

 by wedges only when the strings are stretched. A plain centimetre scale is fitted on the side of the re- 

 sonance box for showing the position of the bridges. 



(.']. 5053, 1151, 1152. 



