Addition and subtraction logarithms to seven decimal places,

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Bibliographic Details
Author / Creator:Wittstein, Theodor, 1816-1894.
Imprint:Chicago, Ill. : The Charles T. Powner co., 1943.
Description:1 p. l., v-viii, 126 p. 24 cm.
Format: Print Book
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Other uniform titles:Johnson, William Walter, 1879-
Bruhns, C. (Carl), 1830-1881. New manual of logarithms to seven places of decimals.
Notes:Pages 1-126 reproduce the tables in Wittstein's Siebenstellige Gaussische logarithmen ... published in Hannover, 1866.
"Intended to supplement Bruhn's [!] seven-figure logarithmic tables." --Introd.