OPERATIONS IN THE PENINSULA. S6d 



11. Latitude and longitude o^ Kylasghur. 



Let Y be Yerracondah, K Kylasghur, and P the 

 pole. Then in the spherical triangle PYK there are 

 given YP = 77° 7' 45".74, the co-latitude of Yerra- 

 C£>;2r7«/i,YK = 46'33'.5], 

 the oblique arc as com- 

 puted on the spheroid ; 

 and the angle PYK = 

 92" 1 3'46". 1 ], as observed 

 at Yerracojidah, to find 

 PK, the co-latitude of 

 Kylasghur which by 

 spherical computation 

 will be had equal 77° 

 9' 38".7, and therefore 

 the latitude equal 12'' 

 50' 21".3, with which 

 latitude the azimuths being reduced, the pole star 

 observations at Kylasghur will stand as follow : 



1803. 



Month. 



Dec. 3. 



7. 

 12. 



13. 



Apparent Polar 

 Distance. 



1°43' 54".74 

 1 43 53.82 

 1 43 52 .84 

 1 43 52.5 



Latitude 



Azimuths. 



r 46' 35".41 

 1 46 34.51 

 I 46 33 .56 

 1 46 33 .46 



Angle between 

 the Pole-star and 

 Referring Lamp. 



3" 28' 57" 

 3 28 52.4 

 3 28 55.25 

 3 28 53 .5 



Angle between the North Pole and Referring Lamp* < 

 Angle between the Referring Lamp and Yerracondah 



Angle between the North Pole and Yerracondah 



Angle between the 

 North Pole and 

 Referring Lamp. 



10 42' 21".59 

 1 42 17.89 

 1 42 21 .69 



1 42 20 .04 



1 42 20.30 E, 



89 17 57.607 



87 35 37 .307 W. 



If the same angle be brought out by using the 

 co-latitudes of Yerracondah and Kylasghur , and the 

 observed angle at Yerracondah^ between the N. pole 

 and Kylasghur, it will be 87° 35' 37", very nearly the 

 same as was observed. 



Then again, as the sine of either of the co-latitudes, 

 is to the sine of the opposite angle, so is the sine of 

 the oblique arc-KY, to sine of the angle KPY, equal 



Bb 



