Medy Motions of the Planets Motion o} =%e Apsid88 Nodox of the Panets, to the Bod of the cat 7d Golden Age. Planet , Ap85 Nods. Sun Mercury Venus, MAYe, Jupite) 88 turn (re.} (ze.) 3 (175) 0 7 28 12 (165) 5 4 48 (220) 8 116 48 (941) 118 210 (403) 4 | 35 48 2) 38 14 34 (96) $ 11 0 24 (40) { (४) 8 8 56 24 (17) 7 19 35 24 (288) 4 40 18 12 r!a nethod of finding the man places of the planets for midnight on the prime meridian having been now fully explained, bhe breatise proceeds so show how they may be found for other places, and for ०hhey titnes of the day. To this pa first requisite is to know the dimensions of the earth. 59. 'wice eight hundred yojwas are the diameter of the 8arth: the square koet of ton times the square of that is the earth's circumference. 6. 'his, multiplied by the sine of the co-latitude (k¢mbj५%) of any place, and divided by radius (trijjux), is the corrected (sphata) circumference of the earth at that place. There is the sainue difficulty in the way of ascextaining the exactness of the Hindu measurement of the ength As of the Greek; the uncer thin value, nanmely, of the unit of measure uployed, 'ne goject rdinarily divided into ®a, series (.e., distancos to which a certain ७ry lay be heard); the word into thisboxlengtsoy ago poles atd these again into ha8 t, cubits. By ite origin, the letter ०ught not to k*y far from eighteen inches; but the higher measures differ greatly in their relation to t. The usual reckoning makes the yojana equai 32,000 cubits, but it is also sometimes regarded as corm posed of i6,000 eubits; and it is accordingly estimated by diferent authoi ties at from fourand a half to rathey more than then milca Engli . This uncertainty is no Imerely modern condition of : HiuenThsang, things - the Chinese monk who vigited India in the middle of the seventh cen. i bury, reports { see Stanislas Julien's Mémoires as Eiouen-Thsang, . 60, atc.) that in India according to ancient tradition a yojana equala forty i: according to the customary use of the Indian lkingdoms, it is thirty t; but the yojany nontioned in the sacred books contains only sixteen
