For a number of years the publishers of SCIENTIFIC AMERICAN also published a SUPPLEMENT, which carried longer articles on specific topics.

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Scientific American Supplement 1878 Volume VI Title
2050 visits
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Scientific American Supplement 1878-12-28
1571 visits
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Scientific American Supplement 1898-10-29
1665 visits
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Scientific American Supplement 1900-12-22
1844 visits
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Scientific American Supplement 1900-12-22a
1433 visits
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Scientific American Supplement 1902-01-25
1329 visits
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Scientific American Supplement 1902-11-15
1479 visits