বৃহস্পতিবার, ৩ মে, ২০১২

Great Ideas from 1862: A Look in Scientific American's Archives [Slide Show]

Archive, Scientific American, Otis elevator, 1862 technology Image: Scientific American, July 26, 1862

Some of these inventions from? century and a half ago were very successful, and some were limited by a lack of understanding of real-world conditions (such as basic science, feasibility or cost) or an overestimation of their utility.

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