4$ METHOD OF CLEARING OBSERVED LUNAR DISTANCES 



from the requifite tables, are all the tables neceflary (after 

 having found the moon and the fun or ftars true altitude) ac- 

 cording to the new method, for finding the true diftance re- 

 quired. And as they require to be opened only about feven 

 times, the whole operation might be eafily performed in about 

 five minutes ; and if carefully done, the anfwer will not vary 

 one fccond of a degree from the truth. 



EXAMPLES. 

 JExample*» ] . Given the apparent altitude of the moon's center, 35° 49.57, 



and the trtfe altitude 36° 33' 9" ; the apparent altitude of 

 the fun's center 28° 49' 54", and true altitude 28° 48' 19 v , 

 and the apparent diftance of their centers 95° 31' 2" req rf 

 the true diftance. 



2) 7 3 19.8514014 2) 7 44 50 -f- 



3 30 l! NatTtinG* 0037278 3 52 25 - 



| App. dift. 47 45 31 Nat. fine 1 5480725 - 



Difference 5443447 Log. + 



5394990 

 \ Diff. true alt. 3 52 25 N. S*.* 0045638 



| Truedifl. 47 31 40 N. S. 1 5440628 

 2 



95 3 20 



True diftance* 



Log. Cofines* 



9.9048840 

 9.9426341 



19.8475181 



19.8514014 



0.0038833 



9.735874Q 



= 9.7319907 



gd. Example from the Requifite Tables, page 38, 3d Edition, ad Jin. 



App. alt. * A 17 , /t True alt. * 11 12 21 



— — 3 9 38 Ho. Par. 54 42 - - JJ 10 26 28 



43 31 2\ = True diftance 

 3. Example 



