PROPERTIES OF PHOSPHOR-BRONZE WIRES 



21! 



CERTAIN ELASTIC PROPERTIES OF PHOSPHOR 

 BRONZE WIRES. 



A. J. OEHLER. 

 INTRODUCTION. 



The work by Guthe 1 , Guthe and Sieg 2 , and Sieg 3 , on platinum- 

 indium wires when used as suspensions for torsion pendulums, 

 showed some remarkable elastic properties of that alloy. The 

 principal one of these was the variation of the period with the 

 amplitude of vibration. It was these studies that made it seem 

 very desirable to test other alloys commonly used for suspen- 

 sions, by a similar method. 



Fig. 2 7. 



The wires employed in this research were of a phosphor- 

 bronze alloy and represented thirteen successive drawings from 

 an original sample. These ranged in diameter from .508 mm. 

 to .100 mm. The wires were very kindly supplied by the Ameri- 

 can Electrical Works of Phillipsdale, Rhode Island. 



15, 1908, p. 1 17. Abst. in Phys. B 



1 K. E. Guthe, Iowa Acad 

 p. 201, 1908 



Sci., 



26, 



2 K. E. Guthe and L. P. Sieg, Phys. 

 3 L. P. Sieg, Phys. Rev., 31, No. !, 



::0, 1910, p. 610. 

 1910, p. 421. 



