Potash, 13, 77, 101, 112. Prague, 218; treaty of (1866), 38. Presburg, 237. Prescription, notion of, 19. Protestants, in Alsace, 77, 96, 113; in Mazuria, 185. Prothero, G. W., 23, 35. Provence, 90. Prussia, 17, 19, 38, 39, 40, 54f., 57, 58, 66, 67, 80, 82, 93, 117, 121, 125, 126, 132, 135, 136, 144, 146, 150, 159, 160, 167, 171, 172, 173-188, 205, 287. Quadruple Alliance, the, 236. Quai d’Orsay, the, 24, 27. Quarnero, gulf of, 247, 249. Queich, the, 80. Race, 15f., 86f., 119, 159, n. 1. Radical party, the, in Denmark, 42, 45. Ragusa, 245, 254, 260. Railroad lines, as related to frontier problems, 12, 55, 176, 180, 184f., 223, 260, 276, 277. Ranke, L. von, quoted, 98. Rationing, problems of, 5. Ratzel, F., 254. Reformation, the, 79. Reichsrat, Austrian, 250, 252. Reichstag, the German, 40, 46, 80, 81, 83, 108, 145. Religious toleration, in Poland, 166. Renan, E., 7f. Reparation, commission on, 28, 142f. ‘Republic of the Great Ukraine,’ the, 194. ‘Republic of the Western Ukraine,’ the, 192. Revolutionary covenant of 1790, in France, 138. Rheinprovinz, the, 124-132, 136, 140, 141. Rhenish Prussia, _see_ Rheinprovinz. _Rhenus finis Germaniae_, 118. Rhine, the, 12, 16, 20, 50, 55, 66, 76, 82, 92, 96, 101, 114, 117-132, 150, 151. Rhine frontier, the, 29, 119, 128. Rhine-Scheldt canal, proposed, 62. Rhode Island, 76, 146. Rhone, the, 93, 182. Right Bank, the, 111, 123, 127, 131. Rio Grande, the, 10. Risorgimento, the, 247. Rivers, unite rather than divide, 12. Röchling, family, 137. Romans, the, 166, 239. Rome, rule of, in Dalmatia, 245, 246, 252. Roosevelt, T., quoted, 286. Rotterdam, 63. Roumania, 3, 28, 156, 210, 238ff., 262, 264, 265, 266, 276, 277, 287. Roumanians, 209, 233, 238ff., 276. Rubens, 26. Ruhr, region of the, 131. Rumenes, the, 250. Russia, 11, 67, 156, 157, 158, 159, 169, 171f., 191, 195-198, 206, 207, 248, 265, 267, 270, 285, 287. Russians, 15, 17, 166, 194. Russification, 163. Ruthenians, 189-195, 233, 238. Ryksvlaanderen, 65. Saar, the, 120, 133. Saar basin (valley, district), the, 13, 21, 29, 76, 77, 80, 101, 117, 120, 125, 132-152, 186, 223. Saarbrücken, 133, 134, 135, 136, 137, 139; county of, 133. Saar Commission, _see_ Governing Commission, the, in the Saar district. Saarhölzbach, 146. Saarlouis, 78, 80, 120, 133, 134, 135, 138, 139. Saint-Germain-en-Laye, treaty of (1919), 3, 213. St. Sophia, 285. St. Thomas, 14. St. Vith, territory of, 54. Salisbury, Lord, 154. Salonica, 277. Salt mines, 77. San Marco, lion of, 246. San Stefano, treaty of (1878), 267. Saône, the, 105. Sarrebourg, 88. Sarreguemines, 146. Saxony, 54, 125, 135. Scandinavia, 11, 87. Scheldt, the, 60, 62-66, 68, 69. Schlei, the, 43, 44. Schleswig, 17, 37-48, 72. Schleswig-Holstein question, the, 38.