Gunmetal

"The beſt Guns are not made of malleable Metal, and cannot be made of pure Copper or Braß; but it is neceſſary to put in courſer Metals to make it run cloſer and ſounder, as Lead and Pot-metal. […] About 20l. of Lead is uſually put into 100l. of Pot-metal; but about 6l. is ſufficient to put into 100l. of Gun-metal."

"The pump [of the steam fire-engine], being at the forward end, was made of gun metal and was double acting, having eight brass suction-valves, four on each side, and four discharge valves, opening into the air vessels, to which a double discharge valve, having one opening on the inside and two on the outside, was attached for the purpose of using two lines of hose."

"Yet even asleep, a Sabre, Jaguar, Harrier, Phantom, Falcon or Eagle holds the eye as a design classic, and that worrisome beauty is still there close up—the cared for, nurtured, spoiled feel, the expensive finish, the quality of the materials, the craftsmanship evident in the flush rivets, the highly polished canopy, the gunmetal sheen of the external instrument sensors, each carefully protected by rubber sheaths with flapping red tags to remind the pilot to take them off before flight."