ON THE MECHANICAL PROPERTIES OF METALS, 103 



Table XIV. — Fourteenth Melting. 



The bars from this melting are something like their prede- 

 cessors in the last table, close and hard, with pointed angles 

 rising on the surface of the fracture. This is a hard iron, very 

 diflScult to work, and indicates brittleness when subjected to 

 blows from a hammer. In its powers to resist impact it is how- 

 ever more ductile than might otherwise be supposed, as the 

 deflections were considerable, and not much inferior to those in 

 the last two tables. Colour a hght sparkling gray, as exhibited 

 in the annexed figure. 



Results reduced to those of bars TOO in, square. 



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 



Specific 

 gravity. 



7^530 



7^530 



Breaking 



weight 



(d). 



595-8 

 605-2 

 609^4 



603^4 



Ultimate 

 deflection 



V43 

 1-49 

 1-62 



Product * X 



d, or power 



of resisting! 



impact 



852 



901-7 



985^4 



1^513 



912-9 



