my of Sciences on The Action of TerrestrialMagnetism upon a Tube of Nickel Steel (Invar) In-tended for Use as a Geodetic Pendulum, by M. G.Lippman. The alloy of nickel and iron known as invar,which possesses a coefficient of expansion only one-twentieth that of brass, has obvious advantages… … Model of 16-inch Army Gun, with Row of Projectiles and Powder Charges for 6-inch to 12-inch Guns. Weight of 16-inch Gun is 130 Tons; Muzzle Velocity, 23,000 feet per Second, and Maximum Range 21 Miles. UNITED STATES WAR DEPARTMENT EXHIBIT AT ST. LOUIS FAIR. in war-time operations. The outside…
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