That is the beginning.By the last page(100),we learn how to calculate a built-up gun, the Mark 7,mod 3, 12".As designed in 1914, the tube was nickel steel tensile-90,000;elastic-55,000,the jacket was nickel steel tensile 90,000;elastic 60,000, and the hoops were nickel steel tensile 95,000;elastic 65,000.Max pressure 37,500 velocity 2900,projectile weight 870 lbs;weight of charge 336 lbs.Although my favorite is the 16" 50 caliber as on the Iowa class.However, you will notice that in 1914 some pretty good steel was available.