Source : Webster's Revised Unabridged Dictionary (1913)

Reserve city \Reserve city\ (Banking)
   In the national banking system of the United States, any of
   certain cities in which the national banks are required (--U.
   S. Rev. Stat. sec. 5191) to keep a larger reserve (25 per
   cent) than the minimum (15 per cent) required of all other
   banks. The banks in certain of the reserve cities
   (specifically called {central reserve cities}) are required
   to keep their reserve on hand in cash; banks in other reserve
   cities may keep half of their reserve as deposits in these
   banks (--U. S. Rev. Stat. sec. 5195).