.SOS 



I NS1 MMKTKK'AI, l.n.\m\:. 



Referring to the experiments of Mr. Strohmeyer and 

 Sir I'.i'iijaiiiiii linker, tliree conclusions of importance, as 

 regards the proportioning of test pieces and the interpre- 

 tation of test results, may be drawn. These are : 



Firstli/. \Ylu-n the effective length of the specimen is 

 diminished, as in B and C (Fig. 150) and in D (Fig. 157), 

 the strength per square inch of the metal is increased 



A P- 



rti 



Y P 



Fift. 158. UNSYMMETRICALLY LOADED BAR. 



beyond that of the original metal to a greater or less 

 extent, according to the proportions of the indentations. 

 This increase is due to the localisation of the extension and 

 the suppression of the drawing out caused by the retarda- 

 tion of the flow of the metal towards the neighbourhood 

 of the fracture. 



