MacKenzie, C., 222 McKenzie, R. D., 190, 201 McLean, Francis H., 179 McMichael, Stanley L., 75, 204 Macpherson, J., 215 McVey, Frank L., 181 Maine, Sir H. A., 181 Manschke, R., 217 Marcuse, Max, 213 Markey, Gene, 222 Marpillero, G., 219 Martell, P., 207 Maunier, René, 169 Maurice, Arthur Bartlett, 192 Maxey, C. C., 185 Mayhew, Henry, 218 Mayr, G. von, 210 Meinshausen, 215 Mensch, Ella (pseudonym), 222 Mercier, Marcel, 177 Meuriot, P. M. G., 167, 211 Miller, H. A., 192 Moore, E. C., 199 Morehouse, E. W., 204 Morgan, Anna, 219 Morgan, J. E., 217 Morgan, W. S., 173 Morse, H. N., 224 Mowrer, Ernest R., 62 Mulvihill, F. J., 185 Mumford, Lewis, 203 Munro, W. B., 60, 201 Myers, C. S., 225 Nichols, C. M., 203 Noack, Victor, 218 Ober, Frederick A., 132 Odum, Howard W., 202 Olcott, George C., 205 Olden, Balder, 187 Ormiston, E., 182 Ostwald, Hans O., 189, 200, 213, 226 Palmer, George T., 227 Park, Robert E., 64, 119, 144, 192, 197, 220 Parker, Horatio Nelson, 203 Payne, George Henry, 89 Pearl, Raymond, 120 Peattie, Roderick, 224 Penck, Albrecht, 187 Perry, Clarence A., 190 Petermann, Theodor, 186 Phelan, John J., 200 Pieper, E., 215 Pirenne, Henry, 172 Pollock, H. M., 173 Pratt, Edward Ewing, 205 Preuss, Hugo, 172 Prinzing, F., 210, 211, 217, 224 Purdom, C. B., 195 Püschel, Alfred, 207 Quaife, Milo Milton, 197 Ratzel, Friedrich, 177 Ravenstein, E. G., 211 Reckless, Walter C., 62 Reeve, Sidney A., 205 Reibmayr, A., 222 Reuter, E. B., 167 Rhodes, Harrison, 176, 200 Richmond, Mary E., 198 Ridgley, Douglas C., 177, 207 Riis, Jacob A., 205 Ripley, W. Z., 209 Roberts, Kate L., 195 Roberts, Peter, 179 Roe, Clifford, 218 Röse, C., 216 Ross, E. A., 223 Rostovtzeff, Michael, 171 Roth, Lawrence V., 207 Rowntree, B. Seebohm, 218, 226 Roxby, P. M., 223 Salten, Felix, 209 Sanborn, Frank B., 179 Sanderson, Dwight, 224 Sarker, S. L., 215 Schäfer, D., 167 Scharrelmann, Heinrich, 189 Schmid, Herman, 209 Schrader, F., 166 Schuchard, Ernest, 213 Schumacher, Fritz, 203, 205 Sears, Charles, 192, 213 Sedlaczek, 207 Seiler, C. Linn, 219 Seligman, Edwin R. A., 189 Semple, Ellen C., 178, 179 Sennett, R. A., 195 Sharp, George W., 213 Shideler, E. H., 62, 203 Shine, Mary L., 181 Simkhovitch, Mark K., 218 Simmel, Georg, 219 Sims, Newell Leroy, 72, 181 Slosson, P., 181 Smith, Adam, 13 Smith, Arthur H., 224 Smith, F. Berkley, 189 Smith, Joseph Russell, 69, 166, 178, 223 Smythe, William Ellsworth, 205 Solenberger, Alice W., 218 Sombart, Werner, 168, 220 Spencer, A. G., 211 Spengler, Oswald, 1, 2, 3, 220 Steele, Rufus, 179 Steffens, Lincoln, 202 Steiner, Jesse F., 213 Steinhart, A., 211 Stella, A., 205 Stelze, Charles, 213 Stephany, H., 212 Stote, A., 195 Stow, John, 172 Strong, Josiah, 173, 213 Strunsky, Simeon, 189