THE SCIENCE ABSOLUTE OF SPACE. 



the ray AM is not cut by the ray [3] 

 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 

 exceed a st. Z ; for in moving BC 

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

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

 then BCNAM. It is clear that BN II EM, 

 wherever the point E be taken on the straight 

 AM (supposing in all such cases AM>AE). 



If while the point C goes away to infinity 

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

 stantly CDB=(CBD< NBC); butNBC=0; and 

 so also ADB=0. 



FIG. 1. 

 can not 



