ASTRONOMY. 4G7 



11. Eclipses of the moon are owing to the sha- 

 dow of the earth falling upon the moon. 



12. The eclipses of the other satellites are caused 

 by their coming into the shadows of their respec- 

 tive primaries. 



13. The tides are owing to the effect of the at- 

 traction of the moon and sun upon the waters of 

 the sea. When the sun and moon act together, 

 they occasion spring tides ; when they counteract 

 each other's attraction, neap tides take place. 



END OF THE FIRST VOLUME. 



London: 



Printed by A. & R. Spottisvroode, 

 New- Street- Square. 



