A P P E N D I X. 225 



*' the difference of thefe mean times will give the longi- 

 tude of the Ihip. 



a 



" For example, June 19th, in the afternoon, the 

 " watch was i' 24" too flow for mean time at the place 

 *' where we obferved ; therefore, when the watch (hews 

 " twelve hours, the mean time at this place was 1 2^ i' 24". 

 " At this time I find by the table, that according to 

 *' Kendal's time-keeper, the mean time at Greenwich was 

 ic J2h 2' y": from this fubtrading 12'' 1' 24", the mean 

 " time at the ihip, the remainder, o' 43" is the difference 

 '' of meridians; which, converted into parts of a degree, 

 *' gives 0° 10' 45" for the longitude of the fhip according 

 " to Kendal, which is to the Weftward, becaufe the mean 

 " time at the fhip is lefs than that at Greenwich. 



*' When we were on fhore, the obfervations were 

 " made with an Aftronomical Quadrant, divided by Mr. 

 " Ramfden, of eighteen inches radius, which was 

 placed on a folid rock of marble; the error of the line 

 of collimation was found by inverting the quadrant, 

 " which was adjufted by a fpirit level. The weather did 

 *' not permit us to take correfponding altitudes of the 

 " Sun, fo that we determined the apparent time by com- 

 *' putation from altitudes of the Sun's limb; having before 

 *' fettled the latitude of the place of obfervation, from 

 *' meridian altitudes of the Sun's limbs taken with 

 ** the fame inftrument. 



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