Smithsonian Report, 1896. 



Plate XXVI. 



brought 



Compound 



iron. 



plate. 



188S. 



1888. 



9f 



^11 



it' 



%*] 



Steel. 



Steel. 



Nickel-steel 



Harveyed, 



1888. 



1894. 



1894. 



nickel-steel 



1 







1894. 



Attack of 6-inch Armor Plates by 4.72-inch Shells, weighing 57.2 Pounds. 



1 



1 



° 1 



Rarer Metals and their Alloys. 



1. The upper series of projectiles are Palliser chilled-iron shells, and the lower are chrome steel. In 

 each case the velocity of the projectile is approximately 1,640 foot-seconds and the energy 1,070 foot 

 tons. 



2. Section of barbette of the Majestic. 



3. Half section midship of aluminum torpedo boat. 



4. Preparations for the microscope of diamonds and other forms of carbon obtained from carburized 

 iron. 



