Word: oxygen
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...acidified water a piece of soft iron sends up bubbles of hydrogen (the metal reacts with the dilute acid and hydrogen is given off). But when the submerged bar was magnetized, Professor Ehrenhaft found oxygen as well as hydrogen bubbles. The only place the oxygen could come from was the water. It seemed that the water decomposed under the influence of the magnet just as water does when an electric current runs through an electrolytic solution. Professor Ehrenhaft argued from this that as no electric current was involved in the experiment, a magnetic current must have done the trick...
British expert G. Geoffrey Smith, whose authoritative work, Gas Turbines and, Jet Propulsion for Aircraft, will soon be published in the U.S. by Aerosphere, Inc., makes this distinction: a rocket carries its own combustion mixture, including oxygen; a jet-propulsion device has fuel but draws oxygen for combustion from the surrounding atmosphere...
...final medieval touch: a helmet hinged on each side of the head just above the ears and locking over the center of the chin. It stems directly from a 15th-Century Italian helmet called armet-a-rondelle. But it fits handily over an oxygen mask...
Somewhere along the skyway, a U.S. bomb-group commander signaled over the interplane radio to P-47s buzzing above the Fortress formation: "Jesus, you guys look good up there." Fighter pilots grinned behind their oxygen masks. Gone were the days when bomber gunners used to spray lead at any fighter that strayed too close...
...inventor of this "electron microanalyzer" is a fledgling still in his late 20s, James Hillier, co-inventor of the electron microscope (TIME, Oct. 28, 1940). The general atomic composition of bacteria and viruses is well known-they are mostly carbon, nitrogen, hydrogen, oxygen. But under high electronic magnification (100,000 times), bacteria often reveal granules of previously undetected substances that are hard to identify. The granules are much too small to be analyzed by a spectroscope, the conventional instrument for the quick determination of atomic components...