Gasoline costs for motor trucks, 198

GRAPHIC METHODS

Gasoline-electric generator advertisement,

Gear teeth, strength of, 334 General Electric Revietv, 78, 239 General methods, 321 Geography books, 22 Gifford, Walter S., 179, 240 Gilbreth, Frank B., 50 Good Housekeeping, 21 Grammar for graphic work, 361 Graphic presentation, rules for, 362 Graphical charts, construction of, 335 Green ink, making line cuts from, 330, 331 Grolier Society, 358, 359 Grouping of component parts, 33 Grooves in cards for filing, 296 Gummed letters, 46

tape for map mounting, 231

Half-tones from pin maps, 235

Handling freight, cost of, 184, 188, 192

Harriman, Mrs. E. H., 250

Harvard Engineering Journal, 337

Harvard University, 212

Harvard University graduates, 251

Hazen and Whipple, 95

Health-department reports, 108

Heating and Ventilating Magazine, 93

Height of university students, 165

Hewes, Amy, 167, 176

Himman, J. J., 114

Hollerith tabulating machines, 229, 230, 231

Holmes, H. W., 208

Horizontal bars, 4

for comparison, 24 '

representing time, 53 "

Hull, G. H., 104

Human figure in comparisons, 39

Illinois Central Railroad, 310 Illusions, optical, 358, 359 Imports and exports of United States, 37 Incandescent-lamp tests, 337 Income curves, 197 Income of technical graduates, 204 Increases shown graphically, 30 Independent, the, 21, 38 Independent variable, definition, 84 Index numbers, 100 Indianapolis Department of Health, 114 Indianapolis smoke deposits, 245 Industrial depressions, 104 Industrial Engineering, 117, 118 Infectious diseases shown in contrast, 30 Information cards, 286, 290

Ink, drawing, 46, 47, 276 Internationale Baufach-Ausstellung, 225 Inversely related curves, 126 Inverted curves, 96 Iron Age, the, 110, 119 Irregular curves, use of, 201 Isometric drawings, 333 ruling, 167, 334, 335