MENSURATION OF HEIGHTS AND DISTANCES. 57 



metros. Jrat es mesure on englisch. J?an es geome- 

 tri als erthly mesure. for it es one of J?e sevene 

 science techyng to mesure }?e erth in heght. 

 depnes and brede. and length. THIS TRETIS ES 

 DEPARTED IN THRE. f>at es to say. hegh mesure. 



after the "good kyng Adlestone." Adelard translated the 

 Elements from the Arabic into Latin, and early MSS. of the 

 translation occur in so many libraries, that we may fairly conclude 

 that it was in general circulation among mathematicians for 

 a considerable time after it was written. Tiraboschi was the 

 first who remarked, that the translation attributed to Campanus, 

 was in reality Adelard's, with a commentary by the former, 

 (Libri Hist, des Mat. torn. n. p. 48) ; there are also several 

 MSS. in the titles to which this is expressly stated, (MS. Bib. 

 Bodl. Seld. Arch. B. 29. MS. Bodl. 3623. MSS. Paris, Lat. 

 7213, 7214, 7215. MS. Harl. Mus. Brit. 5266 : " per Adelar- 

 dum Bathoniensum de Arabico in Latinum translatus, cum Com- 

 mento Campani Novariensis."). In the Library of Queens' Col- 

 lege, Cambridge, there was formerly a MS. entitled " Geometria 

 Euclidis cum Commentario Adelardi" (Lelandi Collect, tom.iii. 

 p. 19), and Chasles (Aperfu Historique, p. 509,) mentions one 

 in the library of the Dominicans of St. Marc at Florence, under 

 the same title ; this would appear to intimate that the com- 

 mentary is also by Adelard, and many MSS. in which the name 

 of Campanus does not appear, contain the commentary, (MS. 

 Oxon. in Coll. S. Trin. 30, iv. MS. Harl. Mus. Brit. 5404. 

 MS. Bib. Pub. Cant. Dd. 12, 61). Doctor John Dee, in the 

 Catalogue of his Collection of MSS. (MS. Harl. 1879. MS. Bib. 

 Trin. Coll. Cant. Collect. Gal. O. 4, 20. MS. Ashm. 1142.) 

 gives the title of one, in which the books of Euclid on Optics 

 and Catoptrics, as well as the Elements, appear under Adelard's 

 name. 



There have been two independent notices of the plagiarism 

 of Campanus ; one by Charles Butler, (the author of the " In- 

 troduction to the Mathematics," 8vo. 1814,) in some MS. 

 papers in the Editor's possession : the other by the Author of 

 the article Geometry, in the " Penny Cyclopaedia." 



