Leaflet, Magic Reckoner

Leaflet, Magic Reckoner

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Description
One side of this folded paper sheet has a multiplication table for numbers from 1 to 50. The other side has instructions for using the table for both multiplication and division, a list of decimal equivalents of fraction, a table of squares, cubes, square roots and cube roots for numbers from 1 to 100, and a list of useful mathematical facts. One panel of the sheet is marked: MAGIC RECKONER and shows a rectangular base with a round scale and a round disc that rotates within the scale.
The Magic Reckoner was distributed with the Wizard Calculating Machine, an adder. For the adder, see 1980.0787.01.
Location
Currently not on view
Object Name
Leaflet
date made
1960
Physical Description
paper (overall material)
Measurements
overall: 7.6 cm x 11.5 cm; 3 in x 4 17/32 in
ID Number
1980.0787.03
accession number
1980.0787
catalog number
1980.0787.03
Credit Line
Gift of Mrs. Joan Pearson Watkins
subject
Mathematics
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Mathematical Charts and Tables
Data Source
National Museum of American History
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