Idl When the horizontal rulings are dose together.

2. AT RIGHT SIDE OF GRID ONLY:

lal When interest is definitely centered of the right, (bl When a noturol reading of the chart requires reading the curve before the scale.

Noie The theory of plocing 'he scole oi the right is ihoi o oerson will normolly read the chort trom let' to right (thoi is. from the curve to the scole ro'her thon (rcn 'he scole lo the cu'vel.

3. AT LEFT SIDE OF GRID ONLY:

lal When interest is definitely centered at the left. jbl When interpretation of the chart requires reading the scale before the curve.

4. NEITHER SIDE It is sometimes feasible to place amount designations adiacent to the plotted values on the curve. iThis treatment is most effective when grid Imes ore omitted, and is especially suited to charts for popular appeal )

AMOUNT-SCALE NUMERALS

1. Amount-scale numerals should be so written and placed that they will clearly and easily indicate the value of the horizontal rulings.

Scales both sides o*rierolly recommended (See proceduie 1 1

Interest ot right

Interest at left

STANDARDS FOR TIME SERIES CHARTS

AMOUNT SCALE CAPTIONS

1. A scale caption should always accompany the amounl-scole numerals unless the character of the scale units is otherwise indicated.

2. Amount-scale captions should be located where they will most effectively mdicate the units of value.

TONS

I.

I..

CopMon

above

numerali

Caption at the tide

»io

RANGE AND SPACING OF TIME SCALE

1. The time scale should correspond to the characteristics of the data both in regard to the span of time covered and the frequency with which values ore recorded.