THE SHAPE AND SIZE OF THE EARTH 65 



We know that the material of which the mountains are com- 

 posed was first worn away by streams and then collected at 

 the bottom of the ocean, where it remained for thousands of 

 years. Later, by vast and probably slow convulsions of the 

 earth's surface, it was raised to an elevation far above the 

 present height of mountains. During additional thousands 

 of years these elevations were worn down to their present 

 condition. We have only to observe the erosion of rocks by 

 a stream to realize that the changes such action involves are 

 hardly appreciable in a lifetime. All the manifest alterations 

 of the surface of the earth could, therefore, have been accom- 

 plished only in an incredible length of time. Moreover, they 

 must have taken place after the earth finally became cool 

 enough for water to remain on it. 



References : 



1. 1205 : 291-294. The Age of the Earth as Shown by For- 



mations. 



2. 1205 : 296-297. Fossils and what they Teach. 



3. 1205:298-303. Age Great, Known by Slow Change of 



Species. 



4. 1304:~45-46. Age of the Earth. 



a. 1201 : 13-17. The Beginning of the Earth. 



6. 1203 : 150-160. Fossils and their Teachings. 



c. 1206 : 455-457. Age Determined from Nebular Hypothesis. 



d. 1210 : 260. The Seven Ages of the Earth. 



e. 1301 : 236-239. Age of the Earth in Geological Series. 

 /. 1303 : 11. Age of the Earth. 



47. THE SHAPE AND SIZE OF THE EARTH 



For many centuries the earth was considered flat, and it 

 was believed that the sun went around it. We now know 

 that the sun does not pass around the earth, that the earth 

 p 



