304 Proceedings of Royal Society of Edinburgh. [sess. 
An angle of 225° or upwards cannot, however, be thus divided 
into five equal angles. But if half of it be so divided, then the 
entire angle will be equal to five angles, each of which is two-fifths 
of that half of it. An angle of not much less than 225° may 
be most conveniently divided by this latter process into five equal 
angles. 
( Issued separately August 19 , 1902 .) 
