[«9] 



too much ; for, fuppofing an error in my run from 

 more to more 10 miles, it would only make the 

 diftance 50 miles, which is 25 or 30 miles lefs than 

 the charts give. 



Latitude obferved at Mocha 13 23' N. 

 Variation of the compafs i%° 33' W« 



Vol. LX1L N XII. An 



