Respuesta :

The second Industrial Revolution is usually dated between 1870 and 1914, although a number of its char- acteristic events can be dated to the 1850s.

Answer:

end of the civil war to 1900

Explanation:

During the Second Industrial Revolution, also called Technological Revolution, steel one became of the most important building material in the world. It also included the expansion of telegraph and railroad systems, gas and water supply, as well as sewage structures, which had earlier been consolidated to a few select cities.