THE SCIENCE ABSOLUTE OF SPACE, 



1. If the ray AM is not cut by the ray [3] 

 M p N BN, situated in the same plane, but 

 is cut by every ray BP comprised 

 in the angle ABN, we will call ray 

 BN parallel to ray AM; this is 

 designated by BN II AM. 



It is evident that there is one 

 such ray BN, and only one, pass 

 ing through any point B (taken out 

 side of the straight AM), and that 

 the sum of the angles BAM, ABN 

 can not exceed a st. / ; for in moving BC 

 around B until BAM+ABC^st. /, somewhere 

 ray BC first does not cut ray AM, and it is 

 then BCIIAM. It is clear that BN II EM, 

 wherever the point E be taken on the straight 

 AM (supposing in all such cases AM&amp;gt;AE). 



If while the point C goes away to infinity 

 on ray AM, always CD = CB, we will have con 

 stantly CDB=(CBD&amp;lt; NBC); butNBC=M); and 

 so also ADB^O. 



