No. 52202. 



Elasticity. 



309 



T 



52 196. 1 : 16. 



52199. 1:10. 



52 202. 1 : 5. 



52.195. Apparatus for Determining Torsional Elasticity, Figure (W. and E. phys. Prakt., 

 Fig. 65) 



The apparatus is (not as shown in figure) built into a massive frame 1.4 m high and has an 

 adjustable tension clip at the top for the wire to be tested, 3-stage aluminium disc, ribbed and gra- 

 duated, 2 rollers turning about pillars and 1 vertical rule. Six different wires and 1 set of perforated 

 lead weights pcrtair>. to the apparatus. 



52.196. Apparatus for Determining Torsional Elasticity, Figure 



The apparatus is constructed in a similar manner to No. 52,195. Four scales can be fixed to 

 the wires to be tested at equal distances. 



Weiler uses it (as per Ztschr. f. d. phys. u. chem. U. 11, 1898, p. 282) constructed in this manner 

 as a mechanical model for demonstrating the potential drop in electric conductors. 



52.197. Apparatus for Testing the Torsional Strength of Metal Bars, Friedr. C. G. Miiller's 

 (M. T., p. 50), consisting of a shaft with crank and clamping device on one base-board 



r>2.198. Torsional Force Model, Friedr. C. G. Muller's (M. T., Fig. 25) 



52,199. Spring Balance (Jolly's), Figure (M. P. I, Fig. 330 [322]), with three different 

 spiral springs, with metal stand, scale backed with silvered glass for avoiding parallax 

 in reading 



s. d. 

 5.10.0 



6.10.0 



52,200. Simple Spring Balance for stress, Figure 



VJ.201. - - idem, with stand and balance pan, as suggested by Kleiber, Figure. . 



.~>L'.202. Spring Balance (Friedr. C. G. Muller's), Figure, going up to 300 g, with two marks 

 for showing maximum and minimum load (M. P., Fig. 7 and 74) . J 



1.10.0 

 0.15.0 



3. 0.0 



0. 5.0 

 0.10.0 



1. 5.0 



f'l. 3321, 691, 4181. 



