Although trains were invented long ago, what kept them from being really efficient?

a-they were too cumbersome.
they ran on wooden wheels.
they could not go uphill.
their tracks were too brittle.

Their tracks were too brittle.

Early train tracks were initially made from iron. Iron is brittle and prone to cracking when trains ran over them repeatedly.

The process of converting iron to steel in an cheap and efficient way changed the quality of railroad rails. Once rails were creating through the Bessemer process and manufactured by Carnegie Steel, the rails help up longer. This also meant trains could be used more effectively and rails could be place all over the country increasing transportation.

the three-fifths compromise was proposed by james wilson and roger sherman, who were both delegates for the constitutional convention of 1787. however, the three-fifth compromise has its roots further back in history, dating back to the continental congress in 1783. the compromise was a result of the apportionment of taxes being related to land values.

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“the iliad” (gr: “iliás”) is an epic poem by the ancient greek poet homer, which recounts some of the significant events of the final weeks of the trojan war and the greek siege of the city of troy (which was also known as ilion, ilios or ilium in ancient times).