128 



Mr. A. Mallock. 



[Dec. 8, 



resemble almost any of the others, and at the same time the forces 

 required to take large cnts were not greater than conld be conveniently 

 applied by hand. 



Sections were made of many of the metallic shavings, and the 

 polished surfaces of these when washed with dilnte nitric acid showed 

 their internal structure very well. 



Figs. 1 to 8 show some of these sections enlarged. 



Fig. 1. 



Shaving of wrought iron (armour plate). Actual thickness '25 inch. 



Fig. 2. 



Shaving of cast iron. Actual thicknes "1 inch. 



