Source Data Reference for:

City = Washington
Time = 1900

City	Year	Size	Size Comment	Year Comment	Author	Title	Location
Washington	1875	160,000			Tertius Chandler	Four thousand years of urban growth	p520
Washington	1882	100,000	passed for the 1st time		Tertius Chandler	Four thousand years of urban growth	p542
Washington	1900	278,700			Carl Ritter	Ritter's geographisch-statistisches Lexikon
Washington	1900	278,000			Tertius Chandler	Four thousand years of urban growth	p493