The magician's own book, or The whole art of conjuring (1862)
Arnold, George, 1834-1865, Cahill, Frank · New York, Dick & Fitzgerald · leaf 280
n geometry, my young readers must bear in mind,the exact periphery or circumference, and the exact area ofany figure bounded by straight lines, may be determinedwith rigorous accuracy ; and if we draw two polygons—sayof one hundred sides, one within and one without the circle—we can ascertain the… … large as we beru suppose, may be so very nearly alike, thateither one will give the area of the circle with great close-ness. By some such means as these Archimedes found thatif the diameter of a circle be called 7, then the circum-ference will be nearly 22 ; and that if the square of thediameter…
Magic tricks
Internet Archive · University of Pittsburgh Library · Public Domain Mark 1.0. Free to use for anything.
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