Industrial Revolution

The Stockholm Metro (Swedish: Stockholms tunnelbana) is a metro system in Stockholm, Sweden. The first line opened in 1950, and today the system has 100 stations in use, of which 47 are underground and 53 above ground. There are seven lines numbered from 10 to 19, in three groups identified by a color: the Green, Red and Blue lines. Each color line has two or three numbered lines on shared sections through the Stockholm City Centre.

The 105.7 kilometres (65.7 mi) long metro system is owned by the Stockholm County Council through Storstockholms Lokaltrafik (SL). The operation is contracted to MTR Corporation.

The Stockholm Metro (Swedish: Stockholms tunnelbana) is a metro system in Stockholm, Sweden. The first line opened in 1950, and today the system has 100 stations in use, of which 47 are underground and 53 above ground. There are seven lines numbered from 10 to 19, in three groups identified by a color: the Green, Red and Blue lines. Each color line has two or three numbered lines on shared sections through the Stockholm City Centre.

The 105.7 kilometres (65.7 mi) long metro system is owned by the Stockholm County Council through Storstockholms Lokaltrafik (SL). The operation is contracted to MTR Corporation.

Universitetet, ("University"), is a Metro station in the Frescati area, close to Stockholm University (Stockholms universitet), and the Museum of Natural History. It was opened on 12 January 1975.

Since the 1990s, the art on the station consists of tiles featuring Carl von Linné and the UN Declaration of Universal Human Rights. This artwork is by Belgian and Parisian artist Françoise Schein. The station includes 12 large tiles panels all dedicated to the travels of Linné around the Baltic. The artist used the travels as the starting point to develop the theme of nature and the ecological problems we are all living now in the world. The work was created in Lisbon on azulejos tiles, then brought to Stockholm. It represents in its conception and its production a real european work of art.

Not far from the station is the Universitetet railway station and several bus lines.

An escalator is a moving staircase – a conveyor transport device for carrying people between floors of a building. The device consists of a motor-driven chain of individual, linked steps that move up or down on tracks, allowing the step treads to remain horizontal.

Escalators are used around the world to move pedestrian traffic in places where elevators would be impractical. Principal areas of usage include department stores, shopping malls, airports, transit systems, convention centers, hotels, arenas, stadiums and public buildings.

The benefits of escalators are many. They have the capacity to move large numbers of people, and they can be placed in the same physical space as one might install a staircase. They have no waiting interval (except during very heavy traffic), they can be used to guide people toward main exits or special exhibits, and they may be weatherproofed for outdoor use.

Escalators, like moving walkways, are powered by constant-speed alternating current motors^{[citation needed]} and move at approximately 1–2 feet (0.30–0.61 m) per second. The typical angle of inclination of an escalator to the horizontal floor level is 30 degrees with a standard rise up to about 60 feet (18 m). Modern escalators have single-piece aluminum or steel steps that move on a system of tracks in a continuous loop.