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

Profile drawings, 211

Progress photographs, 50, 51

Progressive averages, 153

Prominent bar for contrast, 30

Prout, Curtis, ii

Proportions of charts, 355, 356

Prosperity charts, 104

Prussia, distribution of wealth in, 197

Pujo Money Report, 13

Punched-card tabulating machines, 320,

321, 322, 323, 324 Purchasing-department curves, 293

Queen Quality shoes, advertisement, 233

Races in population of the world, 4 Railway Age-Gazette, 115, 142, 224 Railroad annual reports, 309

earnings in United States, 115

operating costs, 142, 143 Rank charts, 32, 63, 65, 66 Rea, Samuel, 308 Record departments for cities, 299

room for corporations, 292 Records for the executive, 288

needless, 285 Rectangular co-ordinates, 132 Reduction of earnings, 329, 330 Reducing glass, use of, 241, 329 Reduction in size of drawings, 241 Reflecting lantern for curves, 303 Reflectoscope for curves, 304 Reports of corporations, 307 Returns, election, 341

Revenues of railroads of United States, 257 Review of Reviews, 46, 47, 229, 231 Rittenhouse, Elmer, 175, 351, 352 Road signs, Japanese, 346 Roads in New York State, map, 222 Routing charts, 17 Routing of papers in an office, 34