18 



pupil are utterly lost. I must, therefore, enlarge 

 upon it a little ; and for this reason, as well as 

 for the sake of correcting some other errors, 

 and of more amply elucidating and inculcating 

 the whole lesson, I shall make out a bit of a 

 diagram, like the tracing of a seaman's courses 

 on his chart, in order the better to explain 

 myself. 



N. 



Let the above represent a Beat to windward, 

 with a Breeze from the North. 



