That is, if a cycle two inches high is used for one scale, a cycle two inches high must be used for the other scale. It would not be possible to compare the "cigar consumption" curve in this chart with the "cigarette" curve in 341.
RATIO CHARTS
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REFERENCES:
Karsten, Karl G., Charts and Graphs, Prentice-Hall, Inc., New York City, 1923.
Wenzel, J.. "Graphic Charts; the Use of the Logarithmic Scale for Charting Statistics," Scientific American, 1917. This issue of Scientific American is so limited that copies are not for sale. However, it is available in most libraries.
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