Sabatier, A., II, _267_. Sabellius, I, _241_. Sacrobosco, I, _360_. Sadler, T., I, _238_, 241. Saint-Martin, I, 167, _168_, 206. St.-Mesmin, M. de., I, 280. St. Vincent, G. de., I, _110_, 117. St. Vitus, Patron of Cyclometers, II, 60. Sales, de, I, 167. Salicetus, I, 64. Salisbury, Earl of (1st), II, _330_. Salmasius, Claudius, II, _168_. Salusbury, Hester, I, _235_. Sanchez, Petro, I, 229, _229_. Sanders, W., I, 207. Sanderson, R., I, _135_. Sara, R., I, _297_. Saunderson, N., I, _377_; II, 301. Scaliger, I, _44_, 110, 111, 112, 113; II, 238. Scevole de St. Marthe, I, 113. Schooten, Van, II, _59_. Schopp, I, _60_. Schott, I, _64_; II, 64. Schumacher, H. C., I, _107_; II, 297. Schwab, I, _230_. Scientific paradoxes, I, 232. Scott, Michael, I, _38_. Scott's Devils, I, 38. Scott, W., I, 20, 27, 38, 39, 155, _191_. Scripture and Science, II, 261. Search, John, I, 247. Selden, J., II, _250_. Senarmont, II, _48_. Serres, De, II, _60_. Shaftesbury, Earl of, II, _181_. Shakespeare, I, 13. Shanks, II, _63_, 65, 109. Shaw, P., I, _142_. Sheepshanks, J., I, _147_. Sheepshanks, R., I, _290_. Shelley, I, 174. Shepherd, S., I, _124_. Sherburne, E., II, _295_. Sheridan, R. B., I, _175_. Sheridan, T., I, _175_. Shoberl, F., II, _270_. Shrewsbury, I, _108_. Siddons, Mrs., I, 189. Simms, W., I, _152_. Simplicius, II, _164_. Simpson, T., I, 377; II, 304. Simson, R., I, _197_, 202, 233. Sinclair, G., I, _207_. Slander Paradoxes, II, 138. Sloane, I, 24. Sluse, R. de, I, _118_, 118; II, 300. Smith, Adam, II, _112_. Smith, Jas., I, _46_; II, 103, _103_, 154, 236, 237, 238, 241, 336, 360. Smith, Jas., II, _217_. Smith, Jas. (Shepherd), II, _55_, 193. Smith, Joseph, II, _69_. Smith, Richarda, I, _242_. Smith, Thomas, I, 346, _346_. Smith, Wm., II, _152_. Smyth, C. P., I, _328_; II, 65. Snell, I, _75_, 75. Socinianism, I, 142, 143. Socinus, I, 3, _143_. Socrates Scholasticus, I, _358_. Sohncke, L. A., II, _131_. Somerville, Mrs., I, _242_. South, J., II, _181_. Southcott, Joanna, II, _58_, 97, 239. Spearman, R., I, _237_. Speculative thought in England, I, 374. Spedding, I, _76_, 82, 142. Speed, J., I, _201_. Speke, I, _70_. Spelling, phonetic, II, 81. Spence, W., I, _231_, 231. Spencer, Earl (3d), II, _9_. {386} Spinoza, I, 3, _37_. Spiritualism, II, 47, 55, 207. Spurius Cassius Viscellinus, II, _342_. Spurius Maelius, II, _342_. Squaring the circle, I, 8, 42, 44, 46, 47, 50, 52, 53, 69, 70, 75, 109, 117, 119, 129, 135, 146, 149, 159, 163, 164, 347, 348, 374; II, 10, 11, 60, 105, 154, 156, 208, 278, 314. Staeckel, I, 230. Stanhope, P. D., (Earl of Chesterfield), II, _298_. Stapulensis, I, _44_; II, 324. Star polygons, I, 229. Starkie, G., I, _126_, 126. Statter, D., II, 80. Steamship suggested, I, 147. Steel, Jas., II, 68. Stenography, II, 81.