ON THE MODULUS OF TORSION AL RIGIDITY OF METAL WIRES. 



55 



TABLE XIII. 



I cannot conclude an account of this work without expressing my sincere thanks 

 for the help I have received from Professor POYNTING. The research was entered 

 upon at his suggestion and continued for some months under his supervision, and all 

 through 1 have had the benefit of his encouragement and advice. I am also indebted 

 to him for the privilege of working in the Physical Laboratory of the University of 

 Birmingham during the Cambridge vacations. 



T wish also to acknowledge my indebtedness and sincere thanks to Professor THOMSON 

 for his kind encouragement and valuable suggestions during the course of the experi- 

 ments at the Cavendish Laboratory. 



