144 CHRONOLOGICAL TABLE 



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. Reaumur's Plistoire des Insectes. 



1736-1819. Watt. 



1737. Linnaeus's Systema Natures; last edition by 



Linnaeus, 1766. Linnaeus's Genera Plantarum. 

 1737-1738. Swammerdam's Biblia Natures published ; 

 written long before. 



1738. Linnaeus's Classes Plantarum. 



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

 begun. 



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



1745. Bonnet's Traite d" 1 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. 



J 753' British Museum founded. 



J 755' Black's experiments on carbonic acid and 



alkalis. 



J 759' C. F. Wolff's Theoria Generationis. 



1760. Lyonet's Traite Anatomique, etc. (larva of goat- 



moth). 



1770. New South Wales discovered by Captain Cook. 



X 775' Priestley's experiments on the restoration by 



green leaves of air vitiated by combustion or 



