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STUDIES, SCIENTIFIC AND SOCIAL 



CttAf. 



traced to Scandinavia, are found scattered over the plains 

 of Denmark, Prussia, and Northern Germany, where they 

 rest either on drift or on quite different formations of the 

 Secondary or Tertiary periods. One of these blocks, 

 estimated at 1,500 tons weight, lay in a marshy plain 

 near St. Petersburg, and a portion of it was used for the 

 pedestal of the statue of Peter the Great. In parts of 

 North Germany they are so abundant as to hide the 



l'l>:. 13. -i;OCK-GROOVINGS AT BARMOUTH. 



surface of the ground, being piled up in irregular masses 

 forming hills of granite boulders, which are often covered 

 with forests of pine, birch, and juniper. Far south, at 

 Fiirstenwalde south-east of Berlin, there was a huge 

 block of Swedish red granite, from one half of which 

 the gigantic basin was wrought which stands before the 

 New Museum in that city. In Holstein there is a block 

 of granite 20 feet in diameter; and it was noticed by 



