Part 17

1668. Redi on the Generation of Insects.

1669. Swammerdam's Historia Insectorum Generalis. Malpighi's De Bombyce.

1671-1677. Grew's Anatomy of Plants; collected in one volume, 1682.

1672-1679. Malpighi's Anatome Plantarum; collected in his Opera Omnia, 1686.

1673. Malpighi's De formatione pulli in ovo. Leeuwenhoek's first paper published by the Royal Society.

1675. Greenwich Observatory founded. Velocity of light determined by Roemer.

1676. Willughby's Ornithologia.

1677. Spermatozoa discovered by Hamm.

1680. Yeast-cells discovered by Leeuwenhoek.

1682. Ray's Methodus Plantarum.

1683. Bacteria discovered by Leeuwenhoek.

1687. Newton's Principia.

1691-1694. Camerarius on the sexes of flowering plants.

1702. Hydra discovered by Leeuwenhoek.

1711-1776. Hume.

1723-1790. Adam Smith.

1725. Vico's Scienza Nuova.

1734-1742. Réaumur's Histoire des Insectes.

1736-1810. Watt.

1737. Linnæus's Systema Naturæ; last edition by Linnæus, 1766. Linnæus's Genera Plantarum.

1737-1738. Swammerdam's Biblia Naturæ published; written long before.

1738. Linnæus's Classes Plantarum.

1740-1761. Roesel von Rosenhof's Insecten-Belustigungen begun.

1744. Trembley's Polype d'eau douce (Hydra).

1745. Bonnet's Traité d'Insectologie (aphids, Nais).

1748. Montesquieu's Esprit des Lois.

1749-1804. Buffon's Histoire Naturelle, the last volumes posthumous.

1752. Identity of lightning and electricity demonstrated by Franklin.