It is permissible to enlarge the curve segments slightly to identify the design more easily.

The curve segments should be of sufficient length to show at least one complete unit of the design.

6. USE OF COLOR. Where color is used for curves it is effective to letter the curve designations in the same colors.

The arrow and designation •'EdKc of Paper" have been added to the original in order to indicate that the outside line is not a frame. See 382.

STANDARDS FOR TIME SERIES CHARTS

RELATION OF CURVE TO PIOHED POINTS

Not* Quesiions on this subieci arise mainly in coses of very heavy curves where the difference >n volues of the upper and lower sides of the curves ore sufTiciently Qreat to give sionificanl differences of interpretation. Where extreme occurocy is required heovy or wide curves should not be employed.

1. Curves should be so drown as to depict accurately the trends and relative values of the plotted points.

2. A uniform procedure should be followed in locating the curves in relation to the plotted points.

MCOUUINOCO

NOT HCCOMUCNOCO

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Relation of elements of curve design to plotted points

irriES

1. The main title should undertake to give the reader a quick understanding of what the chart is about.

2. Titles should be so worded as to be readily understood and so executed as to be pleasing to the eye.

3. Material serving to complete or supplement the main title should be placed in a sub-title.