Ibn Yunis used armillæ, 316; time determination by altitudes, 323; lunar inclination, 343; trigonometrical formulæ, 361.
Inclination of lunar orbit, 342.
Income of T., 257, 279. See Endowment.
Instruments of T., descriptions of, 19, 38, 101, 103, 107, 211; dismantled, 235; illustrated account of, 260; brought to Prague, 279, 283, 284; principle of, 317; subsequent fate, 365, 366, 368.
Interregnum, 198.
Iser Elver, 282.
James VI. visits T., 202.
Jeppe, T.'s fool, 128.
Jessenius of Wittenberg, 272, 295. 296, 311.
Joestelius, assistant to T., 288, 302, 362.
Johannes of Hamburg, assistant to T., 280.
Kaas, Chancellor, 115, 198, 199, 211, 222.
Karen, Andersdatter, 376.
Kepler, J., dates revival of astronomy from Tycho, 20; first correspondence with T., 259, 266; early life, 289; joins T., 293; quarrels with him, 295, 296; reconciled, 297; returns to Gratz, 297; settles at Prague, 299; new quarrel, 300; theory of Mars, 303, 304, 305; refutation of Reymers, 304; at T.'s death, 309, 386; later work, 312; annual equation, 341; on solar excentricity, 346; T.'s successor at Prague, 365; publishes T.'s book, 368; report on his unpublished works, 370; uses and retains T.'s MSS., 370; intends to publish them, 371.
Kepler, L., son of J. Kepler, possessed T.'s MSS., 374 ; sells them, 375.
Knieper, painter, 101.
Knudstrup, T.'s estate, 11, 35, 223, 378.
Krag, professor at Copenhagen, 225.
Kronborg Castle, 85, 101, 140, 143.
Kullagaard, 108.
Kullen lighthouse, 108, 109.
Lacaille, orbit of comet, 1593, 162.
La Hire, 375.
Lange, friend of T., 183, 201, 274, 275.
Latitudes, geographical, supposed to vary, 213, 263.
Lectures by T., 73.
Leipzig University, 16.
Leopold, Bishop of Passau, 367.
Leovitius, Cyprianus, 29, 63, 65.
Liddel, mathematician, 137, 184.
Lindauer, early observation of new star, 62.
Live, maid in T.'s house, 127.
Longitudes, absolute, 348; T.'s plan, 349; determined at Cassel, 352.
Longomontanus, assistant to T., his youth, 126; leaves T., 241; observes eclipse of 1598, 259; T.'s letter to him, 268, 283, 287; travels, 272; arrives at Prague, 288; works on lunar theory, 294, 305, 339; on Mars, 294, 303; returns to Denmark, 299; inscription on globe, 366.
Louis XIV., 374.
Lübeck, Bishop of, 266.
Lunar theory, 187, 294, 305, 338.
Luther, his horoscope, 69; his opinion of Copernican system, 177.
Maestlin, new star, 59; comet of 1577, 171, 181; Kepler's teacher, 289; consulted by Kepler, 297.
Magdeburg, T.'s instruments at, 278, 285.
Magini, T. sends him book on comet, 181; corresponds with T., 212, 262, 271; observes Mars, 214; book on instruments sent to him, 266; criticises T.'s lunar theory, 339; prostaphæresis, 362.
