176 GREEK PHILOSOPHY. 



XVII. On the Locomotion of Animals. (Kepi Tropa'ae 



XVIII. On the Engendering of Animals, (i. II. in. IV. V.) 



XIX. On Colours, (vrept 



This has been considered by some critics to be the work of Theo- 

 phrastus. Plutarch speaks of a treatise by Aristotle of the same name 

 in two books. 



XX. From the Book on Sounds. (EK rov nepl a.Kov<rr<5v.') 

 Apparently a fragment ; although Porphyry, who has preserved it 



in his commentary on the ' Harmonicon' of Ptolemy, says that he has 

 given the whole work. 



XXI. Physiognomica. (^tmoyroyura.) 



Of this tract the last chapter of the ' Former Analytics' is a sort of 

 compendium. Buhle considers it spurious. It is not mentioned by 

 any of the old commentators, but is by Stobaeus and by Diogenes 

 Laertius in his catalogue. 



XXII. On Plants, (i. u.) (vrtpi <urw>'.) 



Aristotle wrote two books on plants, but not these which we have. 

 They are a translation into Greek from the Latin ; and even this ver- 

 sion was considerably removed from a Greek original, having been 

 made by some Gaul from an Arabian version, which, again, was only 

 derived from a more ancient Latin translation. The original of all 

 these, according to Scaliger, was only a cento of scraps, taken partly 

 from Aristotle, and partly from the first book of Theophrastus's ' His- 

 tory of Plants.' Aristotle's work was already lost in the time of 

 Alexander of Aphrodisias. 



XXIII. On Wonderful Stories. (Trepi flav/iao-iW <k-ovo-/ua7-wi>.) 

 This book, in spite of its title, is nothing more than a collection of 



strange accounts, nor does it appear to have formed a part of a larger 

 work of at all a different description. The latter part is obviously 

 spurious, and with respect to the remainder various opinions have 

 been held. Dodwell considers Theophrastus to have been the author ; 

 Scaliger, Aristotle. Buhle regards the whole as a patchwork of 

 extracts from the works of the latter. Our opinion is that the germ 

 of the work is to be looked for in one of those note-books or I/TTO/ZV?/- 

 /mra which were appropriated to collections, and from which supplies 

 were occasionally drawn for more systematic works ; and that this 

 was in its transmission down to our times added to by several hands, 

 and some of these most unskilful ones. See our notice of the ' Pro- 

 blems ' below. (No. XXV.) 



XXIV. Mechanics, (/ur/^avtfca.) 



The first part of this work touches upon the principles of me- 

 chanics, and is followed by a number of questions, which are resolved 

 by a reference to them. This latter part is probably only a few of 

 the 7rpo/3/\j?/Liara cyjcvArXta, or questions on the whole cycle of science, 

 which we find mentioned as a work of Aristotle's, in two books, by 

 Diogenes Laertius, and which is quoted by Aulus Gellius. 



