Pamphlet, A Revised Key to Gould's Patent Artihmetical Frame

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This 56-page paper pamphlet, copyrighted in 1881, has the full title A Revised Key to Gould's Patent Arithmetical Frame; Containing Much New and Valuable Matter, Including Common Fractions, Percentage, and the Metric System. It has a variety of problems in addition, subtraction, multiplication, division and decimal fractions that could be set up on a teaching device called Gould's patent arithmetical frame, along with answers. A section of the pamphlet discusses the metric system, and a variety of other arithmetic problems are included.
On the cover, Gould’s address is given as 72 Murray St., New York. This address is crossed out and Chatham, N.J., is written in in ink.
For a related object, see 1994.0038.01. For related correspondence, see 1994.0038.03.
Currently not on view
date made
Bugbee, H. K.
place made
United States: New York, New York
Physical Description
paper (overall material)
overall: .2 cm x 13.1 cm x 18.7 cm; 3/32 in x 5 5/32 in x 7 3/8 in
ID Number
accession number
catalog number
Credit Line
Gift of Joel S. and D. Hope Pratt
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Arithmetic Teaching
Data Source
National Museum of American History