included in a chart, 24, 25, 26 Dates, position of, in curve charts, 72 Davenport, C. B., ii, 164, 165 Davis, Pierpont V., ii Day & Zimmermann, 296, 305, 306 Death rates in United States, 174, 351 Decreases shown graphically, 30 Degenerative diseases, 351 Department of Agriculture Field Service,

Dependent variable, definition, 84 Depressions, financial, 104 Dimension lines, 5, 148 Directors of corporations, 289, 298 Dispatching charts for trains, 61, 62, 67 Display fixtures for curves and maps, 305

fixtures for maps, 233 Distribution charts, 165

curves, 165

of wealth, 197 _ Dividends and earnings of Steel Corporation, 313, 314 Dixon, Frank Haigh, 115 Dodd, Mead & Co., 250 Dodge's Advanced Geography, 22 Double co-ordinates for curves, 95

scales for curves, 95 '

Draft curves for water consumption, 160 Drawing ink, 46, 47, 276 Dreyfus, Edwin D., 117, 118 Drinking, reduction in, 345 Droege, John A., Freight Terminals and Trains, 48

Earnings and dividends of Steel Corporation, 313, 314 of college graduates. 111 of wage earners in U. S., 180, 181

Earthwork curves, 163

Edison Company, New York, 108, 138, 140, 146

Eggs, price of, 100

Elderton, W. P. & E. M., ii

Election returns, methods of giving, 341

Engineering Magazine, 12, 14, 17, 18, 116,

125, 246 Engineering News, 87 Engineering Record, 79, 119, 209, 210 Equitable Life Assurance Co., 174, 175 Errors in comparison, 20 Ewerbeck, Dr., 225 Exaggeration due to scales used, 353 Examination marks, charting, 205, 206 Executive control curves, 254, 288 Executives of corporations, 289 Exhibition board, 232 Exports and imports of United States, 37 Exports from the United Kingdom, 98 Eye-catchers, 25, 26, 27, 123