Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 449
apart, on a clean sheet of paper.The truzzle is to place a third copper belowthese, as in the diagram (judging entirely bythe eye), so that the inside measurement, AB,shall be exactly equal to the outside measure-ment, CD. Draw a circle where the coin hasrested, and mark it with your initials.… … THE COINS TRIANGLE. known beforehand. One may attain some ac-curacy in the following way: Imagine thecoin resting on the paper so that the inside dis-tances are equal, and then judge the width oftwo coins from the farther edge of the one youhave imagined to be placed. The point thusobtained,…
Children's literature
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