ASTRONOMY. 445 



dicularly under the moon, or where the moon 

 crosses the meridian. 



The sun also has some action upon the waters, 

 though its attraction, on account of its distance, 

 is not so strong as that of the moon. When the 

 action of the sun and moon conspire together, the 

 tide rises higher, and produces what are called 

 spring tides. On the contrary, when they counter- 

 act each other, they produce neap tides. 



