<span> In the last quarter of the 19th century, all four items were sources of energy. Kerosene was commonly used for lighting, electricity was beginning to replace gas lighting and steam was used to power boats, trains, and certain kinds of industrial machinery. Gasoline was the primary fuel of the automobile, or "horseless carriage," which appeared in the 1890's. Of these four, however, steam was introduce the earliest. The concept of the steam engine goes back to ancient times. However, the steam engine was really introduced as a common source of energy early in the 18th Century. So while kerosene, gasoline, and electricity as an energy source were all developments of the 19th century, Steam power is at least a century (and maybe more) older. </span>
Workers formed unions in the late 19th century to get higher wages shorter work hours and a 5 day work a week
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so benefits for the Spartans were they always had a military and those who were in charge of the government were basically the generals so Sparta was always protected. drawbacks, if you were a boy in Sparta you were basically forced into the military and Sparta had two kings both with military power both could have revolted against one another in an instant
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