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It is mainly in their connections with cities under 50,000 population that the 48,300- and 78,800-mile systems show marked superiority to the recommended 33,920-mile system. The latter connects 121 of the 213 cities of population between 25,000 and 50,000, as compared with 147 connected by the 48,300-mile system and 180 by the system of 78,800 miles. The recommended system reaches directly only 295 of the 665 cities of 10,000 to 25,000 population, whereas the 48,300-mile system reaches 351, and the 78,800-mile system 444. Thus, not even the largest of the systems studied is sufficiently extensive to reach all cities of these two smallest population groups. To reach all