Marchant Tables of Factors for Square Roots

These two paper leaflets provide numerical values needed for finding square roots to eight significant digits (Table No. 80) and to six significant digits (Table No. 81). Table 80 was copyrighted in 1951, Table 81 in 1952. These copies of the tables were issued after Marchant became a division of Smith-Corona Marchant Inc. in 1958.
Table 80 allows one to compute square roots on a calculating machine to eight significant digits using a combination of additions and two divisions. Table 81 allows one to find less precise values of the same function using additions and only one division.
Compare to MA*313984.03.
Mathematical Tables and Other Aids to Computation, 7, 1953, p. 168–169.
Currently not on view
Object Name
mathematical tables
date made
ca 1958
Marchant. Division of Smith-Corona Marchant Inc.
Physical Description
paper (overall material)
overall: .1 cm x 21.8 cm x 28 cm; 1/32 in x 8 19/32 in x 11 1/32 in
place made
United States: California, Oakland
ID Number
nonaccession number
catalog number
Science & Mathematics
Mathematical Charts and Tables
See more items in
Medicine and Science: Mathematics
Mathematical Charts and Tables
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of SCM Corporation
Additional Media

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