490 



Frofessor F. T. Trouton 



[March 11, 



found in this way is shown in the table. The agreement with the 

 values found by other methods is satisfactory for experiments of this 

 character. 



Bending of Bars. 



When a bar of pitch is laid horizontally, supported only at its 

 ends, it sags in the middle. In doing so the upper parts of the 





Fig. 6. 



material become compressed, while the lower are drawn out. This 

 is shown in Fig. 6. Two little squares are put in to help us to under- 



DcfLcdian of Viscous Beam,. 



PlCcli 



-K -3 JT 



Fig. 7. 



To — rrr 



stand the movement of the material; these are subsequently trans- 

 formed into the skew shape we have seen to be associated with 

 viscous flow. 



