ON THE MECHANICAL PROPERTIES OF METALS. 



93 



Table IV.— Fourth Melting. 



These bars gave indications of greater hardness, particularly at the 

 corners, where the crystals were more compact, and rather more porous in 

 the centre of the fracture. Colour the same as the last bars. 



Results reduced to those of bars 1*00 in. square. 



Specific 

 gravity. 



Breaking 

 weight 



Ultimate 



deflection 



(d). 



Product b X 



d, or power 



of resisting 



impact, 



Experiment 1, bar 4 ft. 6 in. between 

 supports 



Experiment 2, bar 4 ft. 6 in. between 

 supports 



Experiment 3, bar 4 ft. 6 in. between 

 supports 



Mean 



6^938 



347 

 415^6 



477-7 



101 

 1-22 

 1-55 



350^4 

 508^0 

 740^4 



6-938 



413-4 



120 



520-8 



