Word: discs
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Dates: during 1920-1929
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Within the Spencer Thermostat, there will be a little disc of flexible metal. When an iron or percolator gets too hot, crick! will go the disc, convex like a bubble, and cut off the current. When the iron cools, crack! concave like a saucer, and the current will go on again. Two metals in the disc contract and expand with the temperature, but unequally, causing the disc to warp, crick . . . crack...
...weeks ago was noticeably lacking. The Yale defense appeared as strong as ever, but both Potts and Cole frequently lost the puck to the B. U. defense when, they went down the ice before they had a chance to shoot. The forwards also had considerable difficulty in keeping the disc on the end of their sticks, and the passing was woefully inaccurate...
...used by the expedition, which has been called by Dr. Miller the "best equipped single expedition that has ever gone out to observe an eclipse of the sun." Other apparatus included a two flash spectroscope with which to obtain spectra of the corona,--the gaseous haze surrounding the dark disc during totality; an Einstein camera, the gift of Professor C. L. Poor of Columbia, and especially adapted to proving the Einstein gravitational theory, and a new type of interferometer called the "etalon", designed to detect motion in the Corona. In addition the apparatus included a moving picture machine with which...
...Washington, D. C. He has transmitted " still " pictures from Washington to Philadelphia, and action pictures from one room to an adjoining one. The device is somewhat similar to that used in " telephotography," the light reflected from the pictures being cut into innumerable flashes by a " radio eye," a revolving disc composed of many mirrors. The flashes are transmitted into a photo-electric cell, which transforms them into electric waves to be relayed by wire or radio. The receiving apparatus just reverses the process. Mr. Jenkins is now working to secure longer distance in transmission...
...When Einstein propounded his theory in 1905 he said that it must withstand three tests, the second of which concerned the recent expedition. It is that any star near the limb of the sun (edge of disc) should be displaced away from the sun's disc by 1.75 seconds of are on account of the influence of the magnetic or gravitational field of the sun on the star's light which must pass near the sun in order to reach the earth. According to Newtonian physics this displacement should amount to but 87 seconds...