Statistics for occurrence #1 of “Portland” in chapter 15, entry oilcarryingvessel of Knight's Mechanical Encyclopedia:

...g and discharge, and also for allowing expansion and contraction of the oil without overflow of the liquid or collapse of the tank. Molasses is also carried in bulk from the West Indies to Portland and elsewhere.
...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Portland (Maine, United States) 596 28 198 0 0 user votes
Portland (Oregon, United States) 65 0 29 0 0 user votes
Portland (Michigan, United States) 4 0 0 0 0 user votes
Portland (United Kingdom) 4 3 2 1 0 user votes
Portland (Alabama, United States) 1 0 1 0 0 user votes
Portland (Kentucky, United States) 1 0 1 0 0 user votes
Portland (Arkansas, United States) 0 0 0 0 0 user votes
Portland (Barbados) 0 0 0 0 0 user votes
Portland (Colorado, United States) 0 0 0 0 0 user votes
Portland (Colorado, United States) 0 0 0 0 0 user votes
Portland (Florida, United States) 0 0 0 0 0 user votes
Portland (Georgia, United States) 0 0 0 0 0 user votes
Portland (Illinois, United States) 0 0 0 0 0 user votes
Portland (Indiana, United States) 0 0 0 0 0 user votes
Portland (Iowa, United States) 0 0 0 0 0 user votes
Portland (Jamaica) 0 0 0 0 0 user votes
Portland (Kentucky, United States) 0 0 0 0 0 user votes
Portland (New South Wales, Australia) 0 0 0 0 0 user votes
Portland (New York, United States) 0 0 0 0 0 user votes
Portland (New York, United States) 0 0 0 0 0 user votes
Portland (New Zealand) 0 0 0 0 0 user votes
Portland (North Dakota, United States) 0 0 0 0 0 user votes
Portland (Ohio, United States) 0 0 0 0 0 user votes
Portland (Texas, United States) 0 0 0 0 0 user votes
Portland (Victoria, Australia) 0 0 0 0 0 user votes
Portland (Wisconsin, United States) 0 0 0 0 0 user votes
Portland (Wisconsin, United States) 0 0 0 0 0 user votes

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.