294 FERGUSON'S LECTURES. 



LECT. meridian, on which the degrees are numbered from the 

 ^ equator ; and observe what degree of the meridian the 

 place then lies under ; which is its latitude, north or 

 south, as the place is north or south of the equator. 



The globe remaining in this position, the degree of 

 the equator, which is under the brazen meridian, is the 

 longitude of the place (from the meridian of London on 

 the English globes) which is east or west, as the place 

 lies on the east or west side of the first meridian of the 

 globe. All the Atlantic Ocean and America, is on the 

 west side of the meridian of London; and the greatest 

 part of Europe and of Africa, together with all Asia, is 

 on the east side of the meridian of London, which is 

 reckoned the Jirst meridian of the globe by the English 

 geographers and astronomers. 



PROBLEM II. 



The longitude and latitude of a place being given, to Jind 

 that place on the globe. 



Look for the given longitude in the equator (count- 

 ing it eastward or westward from the first meridian, as 

 it is mentioned to be east or west) ; and bring the point 

 of longitude in the equator to the brazen meridian, on 

 that side which is above the south point of the horizon ; 

 then, count from the equator, on the brazen meridian, 

 to the degree of the given latitude, towards the north or 

 south pole, according as the latitude is north or south ; 

 and under that degree of latitude on the meridian, you 

 will have the place required. 



PROBLEM III. 



To Jind the difference of longitude, or difference of latitude, 

 between any two given places. 



Bring each of these places to the brazen meridian, 

 and see what its latitude is : the lesser latitude subtract- 



