SUGGESTIONS FOR MAKING A CHART

A. Triangles, T-Square, and French Curve.

1. The triangle on the left is 30 x 60 degree, while the one on the right is a 45 degree triangle.

2. French curves are available in a great

many shapes and forms. The one shown here is one of the simplest.

3. These drawing instruments arc part of

the equipment for a standard drawing board.

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ELDOPADO GRADE CHART

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B. Grade Chart for the Lead of Drawing Pencils.

1. This chart gives the difference in the grades of lead in drawing pencils as seen from the

end of the pencil.

2. In choosing a drawing pencil, the depth and width of line desired are among the various

criteria.

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370 I ■

GRAPHIC PRESENTATION

REFERENCES

Arkin. Herbert and Raymond R. Colton. Graphs: How to Make and Use Them. Harper & Brothers. New York City, 1937.

Brinton. Willard C. Graphic Methods for Presenting Facts, McGraw-Hill Book Co.. Inc.. New York City, 1914.

Brown. Theodore H.. Richmond F. Bingham, and V. A. Temnomeroff. Laboratory Handbook of Statistical Methods, McGraw-Hill Book Co., Inc., New York City, 1931.