Word: prevents
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Dates: during 1930-1939
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...files, discovered that in his long search for a Unified Field Theory the great mathematician had not forgotten the uses of photoelectric cells. Patent No. 2,058,562, it appeared, had been issued to Dr. Albert Einstein and Gustav Bucky. Manhattan X-ray researcher, for an automatic device to prevent unskilled photographers from under-or over-exposing their plates.* A photoelectric cell attached to the camera measures the quantity of illumination available, adjusts a screen of varying transparency so that the proper amount of light is admitted to the lens when the shutter is operated. Cornered by newshawks in Princeton...
Possible explanations which have been suggested say that they are to prevent trucks from parking there and rubbing off the while paint, that they are to act as a guiding light for Freshmen wending their way homeward after 8 o'clock, and that it is part of a carefully thought out plan having something to do with the slogan "Make it a White Christmas...
...statement represents a conclusion which does not square with the facts. The Democratic organization in Chicago and Cook County, despite efforts of anti-Roosevelt forces to prevent the achievement of party harmony after the April primary, presented a united front in the Nov. 3 election...
...went back to Buffalo, had a gallows built in the jail yard, a canvas stretched overhead to prevent the curious from seeing from neighboring housetops. After taking unusual precautions to have the execution go off swiftly and without a hitch, he took a stand where he could not see Matricide Patrick, and sprung the trap...
...hair, once almost killed him with one of her pranks. Making a great fuss over his rights, Napoleon outsmarted his jailers almost from habit, played on the sympathies of Europe, started such rumors that presently a large body of troops and a good-sized fleet were assembled to prevent an escape that was literally impossible. Napoleon would hide from his guards, dress his servant in his clothing, start a panic, then shake his head gleefully over the stupidity of the English. Such small victories tightened the restrictions around him. His last struggle was his five-year fight with short, redheaded...