[Roman figures refer to the chapters, Arabic to the articles.]
Hooke (1635–1703), ix. 174, 176; x. 207, 212
Horky, vi. 121
Horrocks (1617 ?–1641), viii. 156; ix. 183; x. 204
Howlett, xiii. 298
Huggins, xiii. 301, 304, 311–313
Hulagu Khan, iii. 62
Humboldt, xiii. 298
Hutton (1737–1823), x. 219
Huygens (1629–1695), v. 98 n; vi. 123; viii. 154, 155, 157, 158; ix. 170–172, 191
Hypatia (?–415), ii. 53
Ibn Yunos. See Yunos
Ishak ben Honein (?–910 or 911), iii. 56
James II., ix. 192
Joachim. See Rheticus
Kaas, v. 106
Kant, xi. 250; xii. 258, 260; xiii. 287
Kapteyn, xiii. 280
Kelvin, xiii. 292
Kepler (1571–1630), ii. 23, 51 n, 54; iv. 91; v. 94, 100, 104, 108–110; vi. 113, 121, 130, 132; VII. passim; viii. 152, 156, 160; ix. 168–170, 172, 175, 176, 190, 194, 195; x. 202, 205, 220; xi. 228, 244; xiii. 294, 301, 309
Kirchhoff (1824–1887), xiii. 299, 300, 311
Kirkwood (1815–1895), xiii. 294, 297
Koppernigk, iv. 71
Korra, Tabit ben. See Tabit
Lacaille (1713–1762), x. 222–224, 225, 227; xi. 230, 233, 235; xii. 257, 259
La Condamine (1701–1774), x. 219, 221
Lagrange (1736–1813), ix. 193; xi. 229, 231 n, 233 n, 236, 237, 238–240, 242–245, 247, 248; xii. 251; xiii. 293, 294
Lalande (1732–1807), xi. 235, 241, 247 n; xii. 265
Lambert (1728–1777), xi. 243; xii. 265
Lami, ix. 180 n
Landgrave of Hesse. See William IV.
Langley, xiii. 307
Lansberg (1561–1632), viii. 156
Laplace (1749–1827), xi. 229, 231 n, 238–248,; xii. 251, 256; xiii. 272, 273, 282, 286–288, 290, 293, 297, 318–320
Lassell (1799–1880), xii. 267; xiii. 295
Lavoisier, xi. 237
Legendre (1752–1833), xiii. 275, 276
Lemaire, xii. 255
Leverrier(1811–1877), xiii. 282, 284, 288, 289, 290, 293, 294
Lexell (1740–1784), xii. 253
Lindenau, xi. 247 n
Lionardo da Vinci. See Vinci
Lippersheim (?–1619), vi. 118
Locke, ix. 191
Loewy, xiii. 283 n
Louis XIV., viii. 160
Louis XVI., xi. 237
Louville (1671–1732), xi. 229