A map from 1902 of Oregon showing the capital of Salem, principal cities and towns, railroads, stage lines, mountains, rivers, and coastal features.

A map from 1906 of Oregon showing the capital of Salem, principal cities and towns, Indian reservations, railroads, mountain systems, lakes, rivers, and coastal features.

A map from 1909 of Oregon showing the capital of Salem, principal cities and towns, Indian reservations, railroads, mountain systems, lakes, rivers, and coastal features.

A map from 1919 of Oregon showing the capital of Salem, principal cities and towns, Indian reservations, railroads, mountain systems, lakes, rivers, and coastal features.

A map from 1922 of Oregon showing the capital of Salem, principal cities and towns, Indian reservations, railroads, mountain systems, lakes, rivers, and coastal features.

A map from 1892 of Oregon showing the capital of Salem, counties and county seats, principal cities and towns, railroads, mountain systems, lakes, rivers, and coastal features.

A map from 1920 of Oregon showing the capital of Salem, counties and county seats, principal cities and towns, railroads, mountain systems, lakes, rivers, and coastal features.

A map from 1920 of Oregon showing the capital of Salem, counties and county seats, principal cities and towns, Crater Lake National Park, railroads, lakes, rivers, and coastal features.

A map from 1903 of Oregon showing the capital of Salem, counties and county seats, principal cities and towns, Indian reservations, railroads, mountain systems, lakes, rivers, and coastal features.

A map from 1920 of Oregon showing the capital of Salem, counties and county seats, principal cities and towns, Indian reservations, railroads, mountain systems, lakes, rivers, and coastal features.

A map of the Oregon Territory showing the boundary on the 49th Parallel established by treaty between Great Britain and the United States in 1846, dividing what was once jointly held territory. The map also shows the boundary with Upper...

A map of the Oregon Country showing the adjustments to the boundaries between 1819-1846, including the southern boundary established by treaty with Spain in 1819, and the boundary dividing the territory between the United States and...

A map of the Oregon Country showing the adjustments to the boundaries between 1818-1846, including the boundary established in 1818 to the east of the jointly controlled territory (Great Britain and the United States), the southern...

One half mile long section of Oregon Trail, worn 2-6 feet into sandstone ridge.

An image of the Oregon State Bird.

An image of the Oregon State Animal.

An image of the Oregon State Animal.

An image of the Oregon State Capital.

An image of the Oregon State Capital.

An image of the Oregon State Capital.

An image of the Oregon State Fish.

An image of the Oregon State Tree.

A solid summary from the University of Oregon of the work of James Maxwell Clerk, Michael Faraday, and others in the field of electric and magnetic phenomena. This is a fine essay.

The University of Oregon provides a definition and detailed chart of the concept of photons, or light quantum.