Note that the two curves and the bars have a common zero line, but the scales arc

different.

Ill

Chapter 44 SUGGESTIONS FOR MAKING A CHART

I HE FIRST problem in producing a chart, assuming that the data have been gathered, is in the choice of materials to be used in drawing it. Often the materials at hand in the office or drafting room are sufficient. It is also possible to plan the production of a chart, basing all the plans on the materials at hand.

PAPER

The test for the selection of paper on which to draw is to try the drawing medium upon it; that is, the ink, pencil, paint, or crayon, and see the result. Cross section paper drawing materials may be secured from the following companies: SOURCES:

Codex Book Co., Norwood, Massachusetts.

Educational Exhibition Co.. Providence, Rhode Island.

Rectangular Coordinate Graph Paper.

1. The number of lines drawn on graph paper and the spacing of the lines may quite often

indicate the use to which the paper will be put. For that reason, a wide choice of printed graph paper is offered the draftsman. The use of printed graph paper saves time and is comparatively inexpensive.

2. One type of rectangular coordinate paper, called utility paper, is shown above. It has

52 spaces on the long edge to represent one year by weeks, or 4 years by months. The 36 spaces may be used to represent one month by days, 3 years by months, or one year by months taking every third space.