When graphic methods are more widely used for portraying quantitative facts, there will be a tremendous gain to accuracy of thought as well as a great saving of that most valuable thing in the world -- time.

THE END

Abbreviations for chart work, 345, 346 Accidents, as affected by daylight, 140

in industrial plants, 144, 145

on railroads of United States, 134, 135 Accountants, viewpoint of, 300 Accuracy and significant figures, 326 Acker, Merrall & Condit Co., 116 Adding machines, pocket, 325 Advertising, bead maps for, 253

maps for, 238, 239

use of curves for, 77, 78 Allen, William H., 250 American Jersey Cattle Club, 278 American Machinist, 335 American Railway Association, 349 American Review of Reviews, 46, 47, 229, 231 American Society of Mechanical Engineers,

ii, 31, 52, 54, 122, 363 American Statistical Association, 167, 176,

American Telephone & Telegraph Co., 5,

179, 240, 309, 353, 354, 355, 356 Analysis of sales, 188 Angle of a cumulative curve, 150

of a curve, 131 Annalist, the, see Neiv York Times Annalist Annual reports, corporation, 307 Apples, price curves of, 127, 128, 129 Arithmetically ruled co-ordinate paper, 132 Atlas of the U. S. Census, see Statistical

Atlas Atomizer for spraying ink, 57 Authorization for curve records, 284 Automobile exports of United States, 41, 43

factory records, 263

factory schedule curves, 150

sales records, 255, 264 Automobiles, comparison of, 347, 348 Averages, moving, 97, 283

progressive, 153

weighted, 103

Babson, Roger W., 120, 121 Bacteria in river water, 20

in river water at varying depths, 85