INDEX.
Abul Hassan, inclination of lunar orbit, 343.
Abul Wefa, armillas, 316; meridian circle, 318; lunar variation, 339. Accuracy of T.'s observations, 356, 387.
Ahmed Ibn Abdallah, eclipse of year 829, 323.
Al Batraki, trepidation, 355.
Al Battani, time determinations, 323; fixed stars, 354; trepidation, 355.
Albumassar, distance of comets, 48.
Al Chogandi, sextant of, 326, 328.
Alhazen, refraction, 80, 334, 336.
Almegist, translations of, 3, 347.
Alphonsine tables, 3, 18, 19, 30, 52, 54, 133, 145, 155, 175 334, 355.
Al Sagani, quadrant of, 328.
Altitudes for time determinations, 323, 325.
Alzerkali, trepidation, 355.
Andreas, servant of T., 272; pupil of T., 275.
Annual equation, 306, 339, 340.
Apianus, Peter, book on astronomy, 6, 79; direction of comets' tails, 45, 166; latitude of Königsberg, 124.
Apianus, Philip, son of Peter, 34.
Apollonius of Perga, planetary system of, 274, 304.
Arbuthnot suggests to publish T.'s observations, 375.
Argelander, place of Nova, 67; accuracy of T.'s observations, 356.
Aristarchus, solar system, 167.
Aristillus used armillæ, 315.
Aristotle, ideas about comets, 63, 160.
Armillæ, 315.
D'Arrest, region about Nova, 67; ruins at Hveen, 379.
Assistants, 117, 280, 288, 302, 381, 382.
Astrolabium, 316, 318.
Astrology, practice of, 21, 24, 49, 54, 68; oration on, 74; calendar, 133; principles of, 146; T.'s opinion of, 155, 384.
Augsburg, T.'s visits to, 30, 81. See Quadrant.
Augustin on T.'s meridian line, 359.
Aurora observed at Hveen, 206.
Axelsen, Cort, assistant to T., 215, 384.
Azimuth, circles, 321; supposed error of, 358.
Bachazek, rector, Prague University, 303.
Bachmeister, professor at Rostock, 26, 308.
Barleben succeeds T. at Hveen, 376.
Barneweld, Dutch statesman, 270.
Bartholin, E., prepares to publish T.'s observations, 373, 374.
Barwitz, Austrian statesman, 269, 278, 369.
Basle, visits to, 29, 81; T. proposes to live at, 84.
Battus, professor at Rostock, 25.
Behaim, geographer, 5.
Below, friend of T., 155, 163, 384.
Benatky Castle, description, 281; new buildings, 286; T. leaves, 298.387
