Text-Book to Accompany Holbrook's Scientific Apparatus: Manufactured by the Holbrook School Apparatus M'F'g Co., Hartford, Conn (Classic Reprint)

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Excerpt from Text-Book to Accompany Holbrook's Scientific Apparatus: Manufactured by the Holbrook School Apparatus M'f'g Co., Hartford, Conn For Arithmetic, is a Numeral Frame, with moveable balls, or counters, to illustrate practically, numeration, addi tion, subtraction, multiplication, division, fractions, and the squares and roots of numbers. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at ... This book is a reproduction of an important historical work. ...

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