Power of Microscopes. Dr. Oliver has a knack of looking at who Holmes, Wende'l things from a novel point of view, has made a calculation, which conveys, he thinks, a clear idea of the magnifying power of the microsin histological research. A man, he copes, now used says, of ordinary stature, enlarged in this proportion throughout, would measure just one mile in height, ten times overtopping the loftiest of the pyramids and twenty times the tallest church "?] spires, and his weight would be sixty million tons, The Magnifying

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