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Indiana University 
foreign port as from another. So with that as a clue to the 
ratio of commerce with foreign ports of the same country, it 
must be considered as reliable. 
Now it so happens that while the Dutch records, so far, 
have not revealed the actual number of ships between the 
United States and Amsterdam, they do give the actual en- 
trances at Rotterdam or the Maas from various ports of the 
United States and the clearances from Rotterdam for the 
same ports. These statistics appear below: 
