[Roman figures refer to the chapters, Arabic to the articles.]
Christine (the Grand Duchess), vi. 125
Clairaut (1713–1765), xi. 229, 230, 231, 232, 233–235, 237, 239, 248; xiii. 290
Clement VII., iv. 73
Clerke, xiii. 289 n
Clifford, ix. 173 n
Colombe, Ludovico delle, vi. 119 n
Columbus, iii. 68
La Condamine (1701–1774), x. 219, 221
Conti, vi. 125
Cook, x. 227
Coppernicus (1473–1543), ii. 24, 41 n, 54; iii. 55, 62, 69; IV. passim; v. 93–97, 100, 105, 110, 111; vi. 117, 126, 127, 129; vii. 139, 150; ix. 186, 194; xii. 257; xiii. 279
Cornu, xiii. 283
Cosmo de Medici, vi. 121
Cotes (1682–1716), ix. 192
Crosthwait, x. 198
Cusa, Nicholas of (1401–1464), iv. 75
D'Alembert (1717–1783), x. 215; xi. 229, 230, 231 n, 232–235, 237-239, 248
Damoiseau (1768–1846), xiii. 286
Da Vinci. See Vinci
Dawes (1799–1868), xiii. 295
Delambre, ii. 44; x. 218; xi. 247 n; xiii. 272
Delaunay (1816–1872), xiii. 286, 287
De Morgan, ii. 52 n
Descartes (1596–1650), viii. 163
Diderot, xi. 232
Digges, Leonard (?–1571 ?), vi. 118
Digges, Thomas (?–1595), v. 95
Donati (1826–1873), xiii. 304
Doppler (1803–1853), xiii. 302
Dreyer, xiii. 308
Dunér, xiii. 302
Ecphantus (5th or 6th cent. B.C.), ii. 24
Eddin, Nassir (1201–1273), iii. 62, 68; iv. 73
Encke (1791–1865), x. 227; xiii. 284
Eratosthenes (276 B.C.–195 or 196 B.C.), ii. 36, 45, 54; x. 221
Euclid (fl. 300 B.C.), ii. 33, 52 n; iii. 62, 66; vi. 115; ix. 165
Eudoxus (409 B.C. ?–356 B.C. ?), ii. 26, 27, 38, 42, 51
Euler (1707–1783), x. 215, 226; xi. 229, 230, 231 n, 233–236, 237, 239, 242, 243; xiii. 290
Fabricius, John (1587–1615 ?), vi. 124
Ferdinand (the Emperor), vii. 137, 147
Fernel (1497–1558),iii. 69
Ferrel, xiii. 287
Field (1525?–1587), v. 95
Fizeau (1819–1896), xiii. 283
Flamsteed (1646–1720), ix. 192; x. 197, 198, 199, 204, 207 n, 218, 225; xii. 257; xiii. 275, 281
Fracastor (1483–1553), iii. 69; iv. 89; vii. 146
Fraunhofer (1787–1826), xiii. 299, 311
Frederick II. (of Denmark), v. 101, 102, 106
