TRANSLATOR'S INTRODUCTION, xvii 



Scholion (LXVII LXXIV). 



Plurium errorum haud animadversorum 

 numerus minuitur (LXXV LXXVI). 



Recensio per auctorem ipsum facta 

 (LXXVII LXXVIII) . 



Err ores recentius detecti (LXXV- 

 XCVIII). 



Now comes the body of the text (pages 

 1502). 



Then, with special paging, and a new title 

 page, comes the immortal Appendix, here 

 given in English. 



Professors Staeckel and Engel make a mis- 

 take in their " Parallellinien " in supposing 

 that this Appendix is referred to in the title 

 of " Tentamen." On page 241 they quote this 

 title, including the words ' * Cum appendice 

 triplici," and say: "In dem dritten Anhange, 

 der nur 28 Seiten umfasst, hat Johann Bolyai 

 seine neue Geometrie entwickelt." 



It is not a third Appendix, nor is it refer- 

 red to at all in the words ' ' Cum appendice 

 triplici." 



These words, as explained in a prospectus 

 in the Magyar language, issued by Bolyai 

 Parkas, asking for subscribers, referred to a 

 real triple Appendix, which appears, as it 



