Rabbi ben Ezra, 60, 127 Radulph of Laon, 60, 113, 118, 124 Raets, 62 Rainer, _see_ Gemma Frisius R[=a]m[=a]yana, 18 Ramus, 2, 41, 60, 61 Raoul Glaber, 123 Rapson, 77 Rauhfuss, _see_ Dasypodius Raumer, K. von, 111 Reclus, E., 14, 96, 130 Recorde, 3, 58 Reinaud, 67, 74, 80 Reveillaud, 36 Richer, 110, 112, 115 Riese, A., 119 Robertson, 81 Robertus Cestrensis, 97, 126 Rodet, 5, 44 Roediger, J., 68 Rollandus, 144 Romagnosi, 81 Rosen, F., 5 Rotula, 60 Rudolff, 85 Rudolph, 62, 67 Ruffi, 150 Sachau, 6 Sacrobosco, 3, 58, 133 Sacy, S. de, 66, 70 Sa`d[=i], 102 ['S]aka inscriptions, 20 Sam[=u]'[=i]l ibn Ya[h.]y[=a], 93 ['S][=a]rad[=a] characters, 55 Savonne, 60 Scaliger, J. C., 73 Scheubel, 62 Schlegel, 12 Schmidt, 133 Schonerus, 87, 119 Schroeder, L. von, 13 Scylax, 75 Sedillot, 8, 34 Senart, 20, 24, 25 Sened ibn `Al[=i], 10, 98 Sfortunati, 62, 150 Shelley, W., 126 Siamese numerals, 36 Siddh[=a]nta, 8, 18 [S.]ifr, 57 Sigsboto, 55 Sih[=a]b al-D[=i]n, 67 Silberberg, 60 Simon, 13 Sin[=a]n ibn al-Fat[h.], 93 Sindbad, 100 Sindhind, 97 Sipos, 60 Sirr, H. C., 75 Skeel, C. A., 74 Smith, D. E., 11, 17, 53, 86, 141, 143 Smith, V. A., 20, 35, 46, 47 Smith, Wm., 75 Sm[r.]ti, 17 Spain, 64, 65, 100 Spitta-Bey, 5 Sprenger, 94 ['S]rautas[=u]tra, 39 Steffens, F., 116 Steinschneider, 5, 57, 65, 66, 98, 126 Stifel, 62 {160} Subandhus, 44 Suetonius, 80 Suleim[=a]n, 100 ['S][=u]nya, 43, 53, 57 Suter, 5, 9, 68, 69, 93, 116, 131 S[=u]tras, 13 Sykes, P. M., 75 Sylvester II, _see_ Gerbert Symonds, J. A., 129 Tannery, P., 62, 84, 85 Tartaglia, 4, 61 Taylor, I., 19, 30 Teca, 55, 61 Tennent, J. E., 75 Texada, 60 Theca, 58, 61 Theophanes, 64 Thibaut, G., 12, 13, 16, 44, 47 Tibetan numerals, 36 Timotheus, 103 Tonstall, C., 3, 61 Trenchant, 60 Treutlein, 5, 63, 123 Trevisa, 136 Treviso arithmetic, 145 Trivium and quadrivium, 73 Tsin, 56 Tunis, 65 Turchill, 88, 118, 123 Turnour, G., 75 Tziphra, 57, 62 [Greek: tziphra], 55, 57, 62 Tzwivel, 61, 118, 145 Ujjain, 32 Unger, 133 Upanishads, 12 Usk, 121 Valla, G., 61 Van der Schuere, 62 Var[=a]ha-Mihira, 39, 44, 78 V[=a]savadatt[=a], 44 Vaux, Carra de, 9, 74 Vaux, W. S. W., 91 Ved[=a][.n]gas, 17 Vedas, 12, 15, 17 Vergil, 80 Vincent, A. J. H., 57 Vogt, 13 Voizot, P., 36 Vossius, 4, 76, 81, 84 Wallis, 3, 62, 84, 116 Wappler, E., 54, 126 Waeschke, H., 2, 93 Wattenbach, 143 Weber, A., 31 Weidler, I. F., 34, 66 Weidler, I. F. and G. I., 63, 66 Weissenborn, 85, 110 Wertheim, G., 57, 61 Whitney, W. D., 13 Wilford, F., 75 Wilkens, 62 Wilkinson, J. G., 70 Willichius, 3 Woepcke, 3, 6, 42, 63, 64, 65, 67, 69, 70, 94, 113, 138 Wolack, G., 54 Woodruff, C. E., 32 Word and letter numerals, 38, 44 Wuestenfeld, 74 Yule, H., 107