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Masonic Magic Lantern Slide - The 47th Problem of Euclid
1890-1930
Maker not marked
USA
Glass; dye
overall: 3 3/16 x 4 x 1/8 in.; 8.0963 x 10.16 x .3175 cm
Scottish Rite Masonic Museum and Library Collection
UN2000.0131.7

Masonic magic lantern slide depicting the 47th problem of Euclid (squares connected at angles by oblique lines).