00/9/ 0099/ oosS/ ooQ ooi $/ 
PHOSPHOR BRONZE WIRES -325 
J7n/ 'f/ct/ A/n/=* Qur-i/e. 
/ o* Cm H— H — • 
r. „ 
O '< •' - X— X— 
" -0-6— 
+ 
1 
+ 
+ 
m 
+ 
y 

+ 
► 

K 
•x + 
1 
/OO 2.00 300 4<?0 ' ^oo 
Am/=>. 
Fig. 25. — Diagram showing effect on wires of varying amplitudes. 
Conclusions . — The specific results of the experiments on phos- 
phor bronze wires that are for record in this paper are the fol- 
lowing : 
1. The effect of drawing these wires is to make the departure 
from ideal elastic solids increase steadily with the increased fine- 
ness of the drawn wires. 
2. A new effect, which might be classed as a second order ef- 
fect, superimposed on the one noted above, has been discovered. 
This effect is the increase in period wilh decreasing amplitude 
after a certain limiting amplitude has been reached. From the 
results of the above experiments it is quite evident that great care 
should be used by all experimenters who use such wires, and 
