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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, 197  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 New 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

Bald Eagle Valley Railroad, 67

Bar diagrams versus curves, 310

Bars combined with a curve, 54 certain made prominent, 29, 30 for use in comparison, 22 horizontal, 4 horizontal, representing time, 53 vertical, 46, 47 vertical, for components, 138

Bead maps, 251

Beads for map use, 247, 248 for statistical charts, 207

Bell Telephone system, 353, 354, 355, 356

Ben Day shading, 216, 220, 331, 332 shading on maps, 209 work, 331, 332

Bertillon, 220

Biologists, use of curves by, 203

Biometrika, 202

Blue-printing, 328 cards, 259, 261 curve cards, 291, 296 machines, 261, 296

Boards for pin records of costs, 191, 192

Bonus earned chart, 52, 54

Boston Elevated Railroad, 4

Boston Globe, 212

Boston Health Department Report, 30,109

Bowley, Arthur L., ii, 98

Breaks in drawings, 190

Bridges, drawing, upon photographs, 209

Brotherhood of Railroad Trainmen, 103

Building construction in United States, 120, 121

Buildings, maps for showing height of, 220

Bureau of Railway Economics, 257

Butter-fat curves, 279

Camera lenses, 330

Cameras, motion picture, for time study, 50

Campaigns, political, 338

Car-floats, dispatching, 61, 62

Cars, shortage and surplus, 349

Cardboard for blue-printing, 259, 261 models, 336