traced upon the Surface of the Sphere. 415 



P. 315, 1. 17, far (4.) read (5.) 



1. 28, far upon in the read upon it in the 



317, 1. 10, after than a, insert and i + a^ir 



1. 12, for read x and for (sin read sin ( 



318, 1. 12, for uniformity read conformity 



Ib. Note. I have attributed that question erroneously. It was not pro- 

 posed by Professor WALLACE, but by Professor LOWRY, and I learn from 

 my valued friend that he had not entertained any idea of treating it in the 

 manner developed in these papers. My mistake arose from its being pro- 

 posed anonymously, and from my accidentally interchanging in my own 

 mind the signatures used by those distinguished geometers. 



322, 1. 16, In would not then dele not 



19, for to search for some read to search for some 



-r- 323, 1. 16, for interesting amusement read instructive employment 



324, 1. 8, for were read was 



~~ 325, 1. 14, for R r or R r read R + r or R r 

 ~~ 327, For From equation (13.) read From equation (12.) 

 From equation (14.) read From equation 13.) 

 ~~ 333, 1. 8, for triangle is in reality read triangle which he employs is 



in reality ; and^r the, at the end of the same sentence, 



read his 



ON THE LOXODROME. 

 (Vid. sect. XXX. XXXIV.y 



The mathematical continuousness of the ship's course in returning to 

 the same place without changing her rhumb, it has been objected by a 

 learned friend, was not satisfactorily established in my former paper. He 



