TITLE

# What Is It?

AUTHOR(S)
MacG. Dawson, Robert J.
PUB. DATE
March 2009
SOURCE
Mathematical Intelligencer;Spring2009, Vol. 31 Issue 2, p57
SOURCE TYPE
DOC. TYPE
Article
ABSTRACT
The article offers information on the image found in the "Curiosum" column by Robert J. MacG. Dawson in the March 1, 2009 issue of the journal. It states that it is "complex slide rule" which could be built using a sheet of paper and an acetate photocopy. The first known planar slide rule for complex numbers was devised by J. W. M. Dumond in the 1920s according to D. J. Whyte. In 1956, Arnold Sander discovered that Faber-Castell produced an alternative design with a transparent cylinder.
ACCESSION #
42539673

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