DECIMAL CLASSIFICATION 
979-5 
Oregon 
14 Aug. 1848 territory organized 14 Feb. 1850 admitted as 33d state 
Area 06,607 sq. mi. Population 783,380 in 1920 36 counties 
Sobriquet: Beaver state Capital: Salem 
Idaho 
3 Mar. 1863 territory organized. Part of Louisiana purchase. First 
included in Oregon, later in Washington territory 
3 July 1890 admitted as 43d state 
Area 83,354 sq. mi. Population 431,866 in 1920 44 counties 
Sobriquet: Gem state Capital: Boise 
Washington 
3 Mar. 1853 territory organized; earlier, part of Oregon territory 
11 Nov. 1889 admitted as 42d state 
Area 66,836 sq. mi. Population 1,356,621 in 1920 39 counties 
Sobriquet: Evergreen state Capital: Olympia 
Alaska 
30 Mar. 1867 ceded by Russia 24 Aug. 1912 organized as territory 
Area 590,884 sq. mi. Population 55,036 in 1920 Capital: Juneau