Inventions: 70 Years That Changed the World, 1845–1915 - Scientific American

[Mark Kohut]

science inventions in those AtD years...

http://www.scientificamerican.com/article/inventions-1915-70-years-that-changed-the-world-1845-1915/?utm_source=twitterfeed&utm_medium=twitter&utm_campaign=Feed%3A+ScientificAmerican-Twitter+%28Content%3A+Global+Twitter+Feed%29


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