Text Book of Gunnery, 1887

8-inch howitzer accuracy angle of departure angle of descent angle of elevation approximately armour axis B.L. gun Ballistic Table Bashforth's bore breach bullets bursting charge calculation calibres carriage case-shot cast-iron causes centre chronograph column common shell compound armour correct corresponding curve cylinder deflection degs diagram diameter Diff difference direction distance effect elongated employed equation error experiments exterior feet field magazines fire flight foot-tons fuzes given gives gravimetric density hoop stress hoop tension horizontal howitzer impact increased Krupp length less Lydd mean muzzle velocity obtained ordnance Palliser shot parapet penetration piece plates powder pressure Price projectile proportion radius range tables recoil remaining velocity resistance rifled rotation round scale screen secs Shoeburyness shrapnel shell sight square inch steel shells stress striking velocity Suppose tabulated tangent thickness tons trajectory trunnions tube twist weight whence wrought iron yards zone