Page 681 - 89 history of astronomy_opt

21, 55, 57 Proctor, R.A., 111 Pritchett, 115
Ptolemy, 11, 13, 21, 22, 23, 24, 93 Puiseux
and Loewy, 108 Pulfrich, 131 Purbach, G.,
24 Pythagoras, 14, 17, 25, 29
Ramsay, W., 106 Ransome and May, 81
Reflecting telescopes invented, 87 Regiomon-
˜
tanus (MAller), 24 Respighi, 82 Retrograde
motion of planets, 22 Riccioli, 107 Roberts,
˜
137 RAmer, O.,78, 114 Rosse, Earl of, 88,
681