Note 185 — Chapter XXXVIII

Printed in 1497, 1537, and 1546 as Brevis ac perutilis compilatio or Rudimenta astronomiae. Digby 190, 13-14th century, fol. 87, gives the Arabic year as 529, while its 1173 should obviously not be A. D. but of the Spanish era. Corpus Christi 224 gives the Arabic year as 528, and the era date has been altered to clxx. m. (1170), probably from mclxxiii (1173), the initial ‘m’ dropping out, and the final ‘iii’ in consequence being misread by a copyist as ‘m.’ The same careless copyist has perhaps dropped an ‘i’ from the arabic year. In BN 6506 and 7377B, according to Jourdain (1819) pp. 115-6, the Arabic year is 529, but the other 1070, a further error. I suppose this is the same treatise as the Liber in scientia astrorum et radicibus motuum celestium or Theoria planetarum et stellarum of “El-Fargânî” which Sudhoff (1917) p. 27, following J. Brinkmann, Die apokryphen Gesundheitsregeln des Aristoteles, 1914, says John of Toledo translated into Latin in 1134.