[s. E. DAWSON] 



THE LINES OF DEMARCATION 



B13 



Reference to a Traverse Table, in any work on navigation, will 

 show these figures to be correct. For comparison, the statement in 

 tabular form is as follows : — 



Enciso's 8uma is a rare book. There are four editions of it, A.D. 

 1519, 1530, 1530, 1546, all of which are in the Lenox Library and 

 tlirough the courtesy of the librarian, Mr. Wilberforce Eames, I am able 

 to give the following tracing of the upper half of the windrose. 

 (Fig. 2). 



Figure 2. 



Close inspection will show a misprint over the north point. A 

 stroke is dropped and it reads XVI instead of XVII ; but it is clearly 

 a misprint for the text underneath gives the distance at length dezisiete' 

 léguas e media seventeen leagues and a half. The error is corrected in 

 the later editions. It is apparent by Fig. 1, for the course of four points 



