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,

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

GRAPHIC METHODS

Portland, Oregon, 208

Power development in United States, 239

Presidential election analysis, 10

Princeton graduates, class of 1901, 73

Princeton University, 111

Production schedule curves, 150