APPENDIX. 



As 6967885 Co. Ar. 3,1568990 



To 6966387 f 6,8430076 



Sois Sine E AB 90° 43' 17" 9,9998040 



To fine B 87 54 30 ^9,9997106 



179 37 47 

 Subtradled from 180 o o 



i05 



022 13 the diflance. 

 Therefore the dlftance is 22,22 minutes, or nautical miles. 

 This multiplied by - 2040 the number of yards in 



— — — — one minute, 

 The product 45328,8 is the diftance in yards. 



To find the Height. 



To the apparent altitude of the objed: above the fen- 

 fible horizon, add the complement of the dip anfwering 

 to the height of the obferver's eye above the fea, the fum 

 is the angle B A E ; to this add the horizontal diftance of 

 the eye and objed: in degrees and minutes, and fubtracft 

 the fum from 180°, the remainder is the angle B: then 

 fay, as the fine of B is to the fine of B A E, fo is the 

 femidiameter of the earth increafed by the height of the 

 eye to a fourth number; from which fubtracling the 

 femidiameter of the earth, the remainder is the height of 

 the objedt. 



S EXAMPLE. 



