Word: vapor
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Dates: during 1930-1939
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...make a daguerreotype, a silver-plated copper plate, scrupulously clean, was subjected to the vapor from iodine until it turned a golden orange color. With the subject's neck held rigidly in an iron clamp the plate was exposed in a camera for from three to 30 minutes, developed by holding it over a cup of hot mercury, fixed by dipping in a mixture of hyposulphite of soda and gold chloride. Finger marks and heat ruin the image of a daguerreotype...
Traffic slowed, necks craned upward one sunny afternoon last week as the airship Los Angeles, convoyed by a half-dozen planes, poked her way across mid-Manhattan. Presently the biggest of the planes began to fly in a mile-circle around the dirigible, spewing a lengthening white plume of vapor behind her. The trail of smoke dripped downward until it hung like a great white curtain completely concealing the airship. Paramount Sound News men, who staged the stunt, ground their cameras busily. As the Los Angeles climbed above the smoke screen and headed for home, the white vapor continued...
...installed in the airplane. When the pilot operates a valve, air is forced into the tank by the speed of the plane in flight, the pressure expelling the Ti CL 4 through a nozzle at the rear. On contact with the atmosphere, the liquid is changed to a cloudlike vapor. Under "unusual" atmospheric conditions, it is said, the tetrachloride joins with moisture in the air to form hydroscopic smoke particles containing hydrochloric acid which may damage leather or rubber compositions, bright dyes, cloth fabric other than wool. Chemical warfare experts of the Army stated that soldiers habitually handle...
...balloon with liquid air. As in the case of the Graf Zeppelin and many smaller craft, it was planned that the Navy's great Akron should be named to the accompaniment of a flask smashed against the nose of her control car, a quick puff of white vapor...
...bridge of platinum and nickel wires (weight i½ Ib.) over which the exhaust gases pass. This bridge is electrically connected, through a tiny battery, to a sensitive ammeter on the pilot's (chauffeur's) instrument board. If the fuel mixture is too rich, the unburned gasoline vapor-hydrogen, carbon monoxide-will cause the platinum wires to glow hot (by its catalytic property), resist electricity. The battery current is thus shunted back through the nickel wires, to register on the graduated scale of the dial exactly what percentage of fuel is not being burned. Dr. Hutchison estimated...