THE STRENGTH AND DUCTILITY OF FLAT STEEL BARS. 197 
Experiments by investigators subsequent to Bara have thrown some doubt upon 
_ the existence of such a maximum. Appiesy (3) found that the extension increased 
continuously up to the ratio width/thickness=8, the highest ratio employed in his 
experiments, but he used a hard grade of Bessemer steel. The results obtained by 
4 
WIDTH 
THICKNESS 
1.—Variation of extension of flat test-pieces with change in the ratio of width to thickness ; measurements obtained 
from bars of soft steel having widths from 10 to 80 mm., a constant thickness of 10 mm., and gauge-lengths of 50 and 
100 mm. (Barsa). 
