Xo. :a in. 



Bending, Breaking, Tension. 



307 



52188. 1:10. 



52 189. 1 : 12. 



52 190. 1 : 13. 



52191. 1:12. 



52.188. Model for Explaining Tension, as suggested by Prof. Eugen Meyer, Figure (Ztschr. 

 d. V. d. I., 53, 1909, pp. 1301 et seq., No. 11, Fig. 35, and text-sheet 14, Fig. 35) 



The rubber plate submitted to the forces PI, P 2 , P 3 and P 4 has a cut in the direction a b and 

 forms a gap.' The division of the forces working on the cut into normal tension and shearing stress 

 is explained. 



52.189. Apparatus (PrandtPs), for Demonstrating the Angular Changes at the edges of a body 

 by shearing stresses occurring in pairs (Ztschr. d. V. d. I. 53, 1909, pp. 1301 et seq., 

 No. 12, Figs. 36 and 37, and text-sheet 14, Figs. 38 and 39) 



The apparatus consists of a system of spiral springs arranged between two glass discs as in the 

 illustration. If these are pulled as shown in the illustration no angular changes result at the corners A, 

 B', C' and D; this case corresponds to ordinary bending. Shearing forces can be applied at the same 

 time; in this case angular changes also take place at the corners, i. e., the right angles are sometimes 

 acute and sometimes obtuse. 



52.190. Apparatus for Demonstrating the Deformation of a Parallelepipedic Body on the end 

 surfaces of which normal shearing stresses act simultaneously, as suggested by Prof. 

 Eugen Meyer, Figure (Ztschr. d. V. d. I. 53, 1909, pp. 1301 et seq., No. 13, and 

 text-sheet 13, Fig. 42) 



A base plate (angle iron W) can be raised and thus intercepts all the weights, and accordingly 

 the elastic slab is unloaded and it assumes its original rectangular shape. 



52.191. --idem, Figure, constructed as per Fig.~43 in the publication mentioned . 



Complete description of Prof. Eugen Meyer's models on application. 



s. d. 

 1.15.0 



Price 

 on appli- 

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10. 0.0 



6. 5.0 



Cl. 5660, 5661, 



5663, 5664. 20* 



