70 



" 2. ' Tractatus de Geometria.' 



" This is an Irish tract with a Latin title, and consists of 

 only one page, containing the simplest rules of geometrical 

 measurement, applied to one example of finding the height 

 of a tower. No mention occurs of any of the old geome- 

 ters. 



" 3. A treatise on the signs of the zodiac. 



" An astrological tract with very curious drawings of the 

 various signs. Messabalah, the famous Arabic astronomer, 

 is mentioned at the commencement, and this tract is very 

 probably translated from one of that author's works. 



" 4. A treatise on the length of the days, in the year. 



" 5. A fragment (one half page). 



" This terminates the contents of this manuscript, and is 

 written in Latin. It appears to relate to abacal arithmetic, 

 but as I confess myself unable to understand its meaning, I 

 give it here entire, in the hopes that some other may be 

 more fortunate in attempting to decipher its meaning. 



" Intervalla autem in quibus distribuuntur. dicimus sedes 

 horum numerorum. qui in abaci regula secundum geometri- 

 cam habitudinem sic proportionaliter ordinali continentur. 

 ut juxta numerum novem caracterum nonis termis alternati 

 distinctis terminis. secundum propor. * * *' 



" I have pointed this exactly as in the original manuscript, 

 but the fragment appears to be altogether unconnected. 



" In addition to the above, I may mention, that in the 

 library of Trinity College, Cambridge, under the pressmark 

 R. xiv. 48, is preserved a short poem in the Irish language on 

 astronomy, of the early part of the thirteenth century.* 

 And in the the Bodleian Library, MS. Rawhnson, B. 490, is 

 a translation of the ' Secreta Secretorum,' of Aristotle, by 

 James Yonge, on vellum, of the early part of the fifteenth 



* This I learn from Mr. Wright. In the printed catalogue, it is said to be in 

 t>axon characters. 



