File:1911 Britannica - Arithmetic21.png

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1911_Britannica_-_Arithmetic21.png (296 × 239 pixels, file size: 67 KB, MIME type: image/png)

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English: The diagrams, A, B, C are simple forms of tables; A giving a sum-series, B a multiple-series, and C a series of square roots, calculated approximately.
(Illustration from Encyclopædia Britannica Eleventh Edition, 1911, article Arithmetic)
Date
Source Encyclopædia Britannica Eleventh Edition, Vol. 2, Page 537;
Author Encyclopædia Britannica, 1911

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Public domain This image comes from the 13th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1929. As such, this image is in the public domain in the United States.

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