Note 2615 — Chapter XXVIII · ARABIC OCCULT SCIENCE OF THE NINTH CENTURY

The distinction between these various works is made quite clear in BN 16204, 13th century, where at pp. 1-183 is John of Spain’s translation of the Liber introductorius maior in eight parts; at 183-302 the Conjunctions, also in eight parts; at 302-333 the Revolutio annorum mundi or Liber experimentorum; at 333-353 the Flores, and at 353-369 the De revolutione annorum in revolutione nativitatum, which opens “Omne tempus breve est operandi....” At the same time the Explicit of this treatise bears witness to the ease with which these works of Albumasar are confused, for it was at first written, “Explicit liber albumasar de revolutione annorum mundi,” and some other hand has crossed out this last word and substituted “nativitatis.”