Full text of "Non-Euclidean geometry; a critical and historical study of its development" See other formats NON-EUCLIDEAN GEOMETRY BO N OL A NON-EUCLIDEAN GEOMETRY A CRITICAL AND HISTORICAL STUDY OF ITS DEVELOPMENT BY ROBERTO BONOLA PROFESSOR IN THE UNIVERSITY OF PAVIA AUTHORISED ENGLISH TRANSLATION WITH ADDITIONAL APPENDICES BY H. S. CARSLAW PROFESSOR IN THE UNIVERSITY OF SYD..