File:Scientific American - Series 1 - Volume 008 - Issue 36.pdf
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![File:Scientific American - Series 1 - Volume 008 - Issue 36.pdf](https://upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Scientific_American_-_Series_1_-_Volume_008_-_Issue_36.pdf/page1-430px-Scientific_American_-_Series_1_-_Volume_008_-_Issue_36.pdf.jpg?20120421143128)
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