Map pins with numbers, 243, 247
presentations, 208
tacks, 225
Maps, coloring, 209
for corporation records, 293
for election returns, 341
for wall use, 225, 229
mounting of, 231
shading, 209
Marx, Guido H., 334
Mass curves, 149
Massachusetts Institute of Technology, 11, 198
Mazda lamps, 337
McAbee, William D., 245
McGraw-Hill Book Co., 335
Mechanical shading, 331, 332
Merchant tonnage of United States, 112, 113
Methods, general, 321
Metropolitan Sewage Commission, 20, 85
Milk-analysis curves, 114
Milk-production curves, 278, 279
Misleading figures, 326
Mode, 165, 170
Models, card-board, 336
solid, 336
"More than", basis for frequency curves, 179
Morgan, J. P. & Co., 15
Motion picture cameras for time study, 50
Motor, 346, 347
Motor trucks, cost for gasoline, 198
cost of operating, 11
Mount Holyoke College, 167, 176
Mounting maps, 231
Moving-average curves, 97, 283
Municipal parades, 343
record departments, 298
Muslin facing for pin boards, 231
Naphtaly, Sam. L., 122
Natural scale for curves, 132
Need for graphic methods, 1
Newark, N. J., public schools, 2
Newburgh, N. Y., report on schools, 24
New York Edison Company, 108, 138, 140, 146
New York municipal parade, 343
New York Public Library, 299, 329
New York Times Annalist, 13, 45, 313, 350
New York Times, 120, 121, 222, 351
Newspaper circulation curves, 92
Nippon Automobile Club, 346
Numbered map pins, 243, 247
Optical illusions, 80, 81, 358, 359
Order of Railroad Conductors, 103
Orders, routing, 19
Organization charts, 14, 15
Orrok, George A., 201
Panics, financial, 104
Parades, charts shown in, 342, 343
municipal, 343
Paraffin crayons, 57
Paris, height of buildings in, 220
Paris, plaster of, 336
Passengers carried on railways, 39
Passenger service on Union Pacific, 312
Payroll curves, 260
record curves, 276
Peaked-top curves plotting, 256
Peaks of curves, 99
Pearson, Karl, 202
Peddle, John B., 335
Pencil lines, erasing, 361
Pennsylvania Farmer, 124, 127, 128
Pennsylvania Railroad, 308
profile of, 213
Percentage scales for curves, 132
Perspective routing charts, 19
Philadelphia Commercial Museum, 70, 74, 76, 112
Philadelphia Transit Commissioner, 245
Philip's Chamber of Commerce Atlas, 26, 27.
Philippines, comparative size of, 211
Photographing bead maps, 252
pin maps, 230, 234
Photographs, drawing upon, 209
progress, 49, 50
used with maps, 209
Photostat, the, 296, 330
use of, 329
Pin boards for cost analysis, 191, 192
Pin maps to scale, 246
Pins for map use, 225
for population density on maps, 221
Pipe, cast-iron, 110
Pittsburgh & Lake Erie Railroad, 81, 82
Plant, Thomas G. & Co., advertisement, 233
Plaster of Paris, 336
Plates, weight of steel, 333
Pneumonia, deaths from, at different ages, 172, 173
Polar co-ordinates for curves, 80
Political campaigns, charts in, 338
Popular Science Monthly, 164, 165
Population curves, 130
density maps, 221
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