ABSOLUTE OF SPA a-:. 



angles of the triangle have necessarily been 

 equal to four right angles. 



&quot;The answer to which is, that there is no 

 connexion between the things at all, and that 

 the result will just as much take place- where 

 the exterior angles are avowedly not equal to 

 four right angles. 



Take, for example, the plane triangle f &amp;gt;nm &amp;lt; 1 

 by three small arcs of the same or equal circles, 



as in the margin; 

 and it is man i test 

 that an arc of this 

 circle may be car 

 ried round pre 

 cisely in tlie way 

 described and re 

 turn to its old sit- 

 u a t i o n. and yet 

 there be no pre 

 tense for infer 

 ring that the exterior angles were equal to 

 four right angles. 



&quot;And if it i- urged that these are curved 

 lines and the &amp;gt;tatement made was of straight; 

 then the answer i&amp;gt; bv demanding to know, 

 what propertv of straight lines has been laid 

 down or established, which determines that 

 what is not true in the case of other lines is 



