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- Scientific American 1887-11-05 1205 visits
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- Scientific American 1887-12-10 1424 visits
- Scientific American 1887-12-17 1290 visits
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- Scientific American 1887-12-31 1313 visits
- Scientific American 1890-11-29 1688 visits
- Scientific American 1891-01-17 1607 visits
- Scientific American 1891-01-24 1415 visits
- Scientific American 1891-01-31 1840 visits
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- Scientific American 1891-02-14 1197 visits
- Scientific American 1891-02-21 1578 visits
- Scientific American 1891-02-28 1412 visits
- Scientific American 1891-03-07 1501 visits
- Scientific American 1891-03-14 1223 visits
- Scientific American 1891-03-21 1633 visits
- Scientific American 1891-03-28 1573 visits
- Scientific American 1891-04-04 1774 visits
- Scientific American 1891-04-11 1540 visits
- Scientific American 1891-04-18 1817 visits
- Scientific American 1891-04-25 1223 visits
- Scientific American 1891-05-02 1639 visits
- Scientific American 1891-05-09 1558 visits
- Scientific American 1891-05-16 1592 visits
- Scientific American 1891-05-30 1673 visits
- Scientific American 1891-06-06 1298 visits
- Scientific American 1891-06-13 1513 visits
- Scientific American 1891-08-15 1576 visits
- Scientific American 1891-08-22 1405 visits
- Scientific American 1891-08-29 1476 visits
- Scientific American 1891-09-05 1276 visits
- Scientific American 1891-09-12 1544 visits
- Scientific American 1891-09-19 1299 visits
- Scientific American 1891-09-26 1584 visits
- Scientific American 1891-10-03 1523 visits
- Scientific American 1891-10-10 1462 visits
- Scientific American 1891-10-17 1491 visits
- Scientific American 1891-10-24 1593 visits
- Scientific American 1891-10-31 1337 visits
- Scientific American 1891-11-07 1193 visits
- Scientific American 1891-12-05 1576 visits
- Scientific American 1892-01-09 1454 visits
- Scientific American 1892-01-16 1280 visits
- Scientific American 1892-01-23 1405 visits
- Scientific American 1892-01-30 2021 visits
- Scientific American 1892-02-06 1649 visits
- Scientific American 1892-02-13 1480 visits
- Scientific American 1892-02-20 1446 visits
- Scientific American 1892-02-27 1450 visits
- Scientific American 1892-03-05 1582 visits
- Scientific American 1892-03-12 1586 visits
- Scientific American 1892-03-19 1274 visits
- Scientific American 1892-03-26 1350 visits
- Scientific American 1892-04-02 1756 visits
- Scientific American 1892-04-09 1441 visits
- Scientific American 1892-04-16 1480 visits
- Scientific American 1892-04-23 1542 visits
- Scientific American 1892-04-30 1235 visits
- Scientific American 1892-05-07 1476 visits
- Scientific American 1892-05-14 1438 visits
- Scientific American 1892-05-21 1208 visits
- Scientific American 1892-05-28 1638 visits
- Scientific American 1892-06-04 1436 visits
- Scientific American 1892-06-11 1507 visits
- Scientific American 1892-06-18 1107 visits
- Scientific American 1892-06-25 1618 visits
- Scientific American 1893-01-07 1687 visits
- Scientific American 1893-01-14 1792 visits
- Scientific American 1893-01-21 1569 visits
- Scientific American 1893-01-28 1647 visits
- Scientific American 1893-02-04 1634 visits
- Scientific American 1893-02-11 1697 visits
- Scientific American 1893-02-18 1518 visits
- Scientific American 1893-02-25 1602 visits
- Scientific American 1893-03-04 3584 visits
- Scientific American 1893-03-11 1407 visits