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 different picture from any groupings of States because most of the topographic divisions subdivide States and comprise portions of several States. Delaware, Iowa, Nevada, and the six New England States are the only States that appear in their entirety within their division. Figure 6-5 shows the 19 topographic divisions delineated for the 1900 population census report, and lists the number of counties and statistically equivalent entities in each division.

Figure 6-5. 1900 Census Topographic Divisions Based on Physiography

Total Counties and Statistically Equivalent Entities in the Continental United States: 2,828 Statistical Groupings6-15