Introduction, p. xxxix 
The System of the World (1800)
                                    
Johann Heinrich Lambert: Idézetek angolul
Sect. 4, Lemma 26, Insigniores orbitae cometarum proprietates (1761) [Notable properties of comets' orbits] translated by Florian Cajori, A History of Mathematics https://books.google.com/books?id=kqQPAAAAYAAJ (1906) p. 259, from the German of Michel Chasles, Geschichte der Geometrie, haupsächlich mit Bezug auf die neuern Methoden https://books.google.com/books?id=NgYHAAAAcAAJ (1839) p. 183.
                                        
                                        Introduction, p. xxxix 
The System of the World (1800)
                                    
The System of the World (1800)
