The terms "100% band chart," "percentage chart," and "percentage band chart," designate only those charts in which material is presented qn the basis of 100%. See 297B, 299B. and 300. The terms "surface chart" and "band chart" may be used when referring to either of the two charts shown on page 300.

Pfdfral Rfservc Bank of New York. "Monthly Review," July 1. 1037. SCALE .7

A. Reserve Balance of Banks in the New York Federal Reserve Bank District from 1932 to 1937.

1. In a curve chart, showing component

parts, it is possible to plot the totals of several groups of figures and the parts of which the total is composed.

2. In order to show rulings in a solid

black or cross-hatched area, white ink is extremely useful. The white lines may be drawn after the area is completely filled in with ink.

Alexander Hamilton Institute. N. Y C . ' Busine<.s Conditions Weekly." July 2S. 1').18 8. Employment and Unemployment in the United States from 1929 to 1938.

1. Because it probably was desired to emphasize the unemployed, the division of the total supply of workers representing the unemployed was put in black ink.

2. Note that the total supply of workers

increases each year, due no doubt to the increase in population

COMPONENT PARTS SHOWN BY CURVES

U S Department of ARriculturc. Bureau of Agricultural Economics. Approximate Acreage of Crops Harvested and of Pasturage to Feed Horses and Mules in the United States from 1900 to 1936.