the months of a year, by noting the position of JASON in the line, it is easy to determine whether the year begins with January or June.

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Federal Reserve Bank of New York, "Monthly Review." April 1. 1937

B. Money Rates in the New York Market from 1931 to 1937.

This line chart has taken the appearance of a stair chart because .•noney rates do not fluctuate a great deal from week to week except under unusual conditions. Compare with 135B and 264A.

Dun's Review. November 1938.

Scale -6

C. Failures by Federal Reserve Districts in the United States from 1936 to September 1938.

1. This arrangement of curves enaMes

one to put a great many on one grid in a very small space.

2. Note that the zero line of each curve

is the top line in the one below. Compare with 271A.

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GRAPHIC PRESENTATION

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; 1 1 ;i j a 1 9 > II { s J ; ; 1 1 s .1 1 2 s .8 s } ? Iji 11 ! .: 1

Brinton, "Graphic Methods." McGraw-Hill, 1914.

SCALE .5

A. Yearly Average of Revenue Tons per Train Mile on the Pittsburgh and Lake Erie Railroad.

1. The dotted line in this chart is a progressive average, or an average of all the items