122 



THE DISSIPATION OF ENERGY 



ANNEALING FROM HIGH TEMPERATURES 



A length of brass wire heated to 535 C. was annealed and 

 then tested. The values got, 



o=l, w=2-30, 



a=l, w=2-70, 



show no change from those for wire heated to 535 C., and 

 quickly withdrawn from the furnace. On that occasion the 

 values got were a=4, w=2'30 and 2*60. An experiment when 

 the wire was annealed from 485 C. also showed no change. 



RESULTS WITH VARIOUS OTHER WIRES 



THE EFFECTS OF FATIGUE ON TORSIONAL OSCILLATIONS 



In the preceding observations it was noted that the appli- 

 cation of a large extensional force had a great effect in some 

 cases, notably in the case of several of the metals after having 



