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Noted 19th-century mosaics include those by Edward Burne-Jones at St Pauls within the Walls in Rome. Another modern mosaic of note is the world's largest mosaic installation located at the Cathedral Basilica of St. Louis, located in St. Louis, Missouri. A modern example of mosaic is the Museum of Natural History station of the New York City Subway (there are many such works of art scattered throughout the New York City subway system, though many IND stations are usually designed with bland mosaics.) Another example of mosaics in ordinary surroundings is the use of locally themed mosaics in some restrooms in the rest areas along some Texas interstate highways.

Which station in the NYC subway has a modern example of mosaic?
Answer: the Museum of Natural History station
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In comparison to the principal alternative, the diesel engine, electric railways offer substantially better energy efficiency, lower emissions and lower operating costs. Electric locomotives are usually quieter, more powerful, and more responsive and reliable than diesels. They have no local emissions, an important advantage in tunnels and urban areas. Some electric traction systems provide regenerative braking that turns the train's kinetic energy back into electricity and returns it to the supply system to be used by other trains or the general utility grid. While diesel locomotives burn petroleum, electricity is generated from diverse sources including many that do not produce carbon dioxide such as nuclear power and renewable forms including hydroelectric, geothermal, wind and solar.

What do some electric traction systems provide?
Answer: regenerative braking
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On 17 April 1861, five days after the Confederate attack on Fort Sumter, the legislature voted to secede from the United States and joined the Confederacy. Official action came in May, after the Confederacy promised to move its national capital to Richmond. The city was at the end of a long supply line, which made it somewhat difficult to defend, although supplies continued to reach the city by canal and wagon for years, since it was protected by the Army of Northern Virginia and arguably the Confederacy's best troops and commanders. It became the main target of Union armies, especially in the campaigns of 1862 and 1864-5.

On what date was Virginia's secession from the Union?
Answer:
17 April 1861