Iscuss technological innovations during the second half of the 1800s.

Discuss technological innovations during the second half of the 1800s. At least five or more paragraphs with at least five MEANINGFUL sentences, focuses on the topic, gives a much more detailed overview, including names, dates, and events, uses the text and/or wikipedia (or similar) plus two additional sources (web based or print). Include any links at the end of the report. Use from text: Liberty, Equality. Power 2nd Edition, A History of the American People, Volume II! Since 1863 by John Murrin, Paul Johnson, James McPherson, etc.