368 FERGUSON'S LECTURES. 



Sun's meridian altitude 70 20* North 



Sun's declination, add 23 20 North 



The sum is 93 40 



From which subtract 90 



Remains the latitude 3 40 North. 



4. If the sun has south declination, and is north of 

 your place at noon, subtract the declination from the 

 north meridian altitude, and the remainder is the com- 

 plement of the latitude south. 



Sun's meridian altitude ...... 50 30' North 



Sun's declination, subtract ... 20 10 South 



Complement of the latitude .... 32 20 

 Subtract this from 90 



And the remainder is the latitude . 57 40 South. 



5. If the sun has no declination, and is south of your 

 place at noon, the meridian altitude is the complement 

 of the latitude north : but if the sun be then north of 

 your place, his meridian altitude is the complement of 

 the latitude south. 



EXAMPLES. 



Sun's meridian altitude . . . . 38 30' South 

 Subtract from 90 



Remains the latitude 51 30 North. 



Sun's meridian altitude 38 30' North 



Subtract from 90 



Remains the latitude 51 30 Sonth. 



