Word: polars
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Dates: during 1940-1940
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Invented and manufactured by J. M. Cohen of Potomac Chemical Co., Tectyl does two things: 1) separates salt water from steel, 2) forms an oily, protective coating on the metal. It is electromagnetically attracted to steel and other electrically conducting metals, forms what are called polar films. There are four grades corresponding to film thicknesses ranging from .0002 to .0008 inch. The lightest Tectyl (thinnest film) can be used for cleaning machines of oil and dust, leaves a temporary lubricating and protective layer. The heaviest grade provides longtime protection for metals exposed to weathering...
...Professor of Polar Geography was installed at Oslo University to acquaint Norwegians with their new colony...
...Polar bears have been seen swimming 300 miles from land...
...biologically speaking, Venus appears much younger than Earth, then Mars appears much older. It is smaller and colder than Earth, has lost most of its atmosphere and water. But a thin atmosphere it still has, perhaps containing a little oxygen. And Mars has a little water, as the white polar caps show. These caps melt in the Martian summer, accumulate again in winter. The excitement over possible Martian inhabitants was started in the 19th Century by the Italian astronomer Schiaparelli, who described hazy streaks on the surface, called them canali. This Italian word means "channels," was erroneously translated "canals," which...
...mounting for the telescope is of the two-pier type, but the special nature of the Schmidt-type reflector has made it necessary to include several unusual features. Construction is being super-intended by Mr. Herbert E. Hanson of the observatory staff. Except for the polar axis and counterweights, the mounting is of Dowmetal,--probably the first telescope mounting ever made of this specially light and strong magnesium alloy. The Dow Chemical Company, of Midland, Mich., cooperated in providing the difficult castings necessary for both the telescope tube and mounting...