304 



Molecular Effects of Solids. 



No. :,'2 176 



52176. 1:8. 



52 179 A. 1 : 20. 



52 179 B. 1 : 20. 



52 180. 1 : 13. 



52,176. Apparatus for determining elasticity in bending, Figure (W. u. E. phys. Prakt., 

 Fig. 63) 



The apparatus consists of two wood blocks fixed on boards, those blosks being fitted with clamps 

 for screwing down the wires; the blocks can be weighted by means of weights. In addition the fol- 

 lowing pertain to the apparatus: 1 vertical scale on base, one pointer for sliding along the rod to bo 

 tested; 3 steel rods and 1 copper rod. Weights not included in above price. 



52.177. --idem, with small glass scale, graduated in 

 Microscope No. 51,474 



The soalc is fixed to the rod instead of the pointer. 



52.178. One Set Weights, suitable for No. 52,176 and 52,177 



mm, for reading with Reading 



s. (1. 

 1. IL'.O 



2. 0.0 



1. 5.0 



52.179. Transverse Strength Apparatus, as suggested by Prof. Fug. Meyer. F i g s. A and B, 

 for explaining the calculation of the transverse strength of straight bars, also for ex- 

 plaining the conception of bending moment (Z. d. V. d. I., 53. 1000, p. 1301 el se<|.. 



No. 3, and text-sheet 13, Figs. 7 and 8) 6.15.0 



The wire maintained in tension at one end is loaded at the other end, Pig. A. The end of 

 the bar in tin- clip is then moved up to a nick F, at which the l>;ir run be dismounted: and forces 

 of such direction and magnitude are applied to the loaded portion that the portion of the bar in the 

 original position is again in a state of equilibrium. F i g. B. 



52.180. Bent Crankshaft, as suggested by Prof. Kug. Meyer. I-' i g 11 re. a model for demon- 

 strating the bcndini: moment, the turning moment and the thrusts in a crankshaft (Z. 



d. V. d. I., 53, 1000, pp. 1301 et se,.. No. }. and text-sheet 13, Figs. 1012) . . 10. i:>.0 



Tile crankshaft can be divided in the centre of the crank pin in order to explain the actions 

 of the individual forces at this section. 



Registering Apparatus for Sag in Bridge Constructions, etc. quoted for on application. 



. Wi38, 





