HOW THE SPEED OF LIGHT WAS DISCOVERED.
One of the greatest discoveries of science is due to observation of the eclipse of Jupiter's moons. It wan found that when the; earth was in the part of its orhit nearest to Jupiter these eclipses occurred sixteen minutes* earlier than when it was in the farthermost part,; whereas hy all rules of astronomy they should have occurred at the same minute each time. It was deducted from this that light was not instantaneous, and consequently too'? sixteen minutes to traverse the diameter of the earth's orbit, a distance of about two hundred million miles, thus giving to light a velocity of one hundred and eighty-six thousand miles a second, which was accurately sho.\n later by other experiments.
It is a good plan to keep one or two books ,and a few toys solely for the use of the little patient afflicted with some non infectious ailment. Familiar books and toys lose a great deal of their, interest when the patient is fretful and ill, and new pictures and toys are certain to make him forget his woes for a time. Mechanical toys are a source of great delight, and any trifling present assumes great importance in his eyes during the weary days of convalescence.
Try feeding millet seed to the little chicks. It can be grown very easily.
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Cromwell Argus, Volume XLIII, Issue 2338, 3 February 1913, Page 2
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226HOW THE SPEED OF LIGHT WAS DISCOVERED. Cromwell Argus, Volume XLIII, Issue 2338, 3 February 1913, Page 2
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