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[Tlif )>/■/■« Ohseri-alonj. 



A MIGHTY CRATER. COPERNICUS. 



This 18 one of the largest of the Moon's craters. The immense depression has a diameter of forty-six miles and is bounded by 

 the circular range of mountains 12,000 feet high. The volcanic cones in the centre of the crater tower 24.000 feet above 

 the lava bed. 



