XXll 



CONTENTS. 



viiis; 718, 719. Geological changes ; Reality of va- 

 rious clianges ; 720. Effects of rivers and of the sea ; 

 Shouting stars; 721. Falling stones ; 722. 



Lectuhe lviii. On vegetation; 

 723. 



Sketchof natural history ; Minerals; Vegetables ; 723. 

 Animals ; 724. Distinctions of animals and vegetables; 

 725. Description of a vegetable: Germination j 

 Parts of plants; 726. Vessels; 727. Motion of the 

 sap; 728. Mr. Knight's experiments ; Grafting; 729. 

 Diseases of plants; Exposure to the air; Linnean 

 system; 730, 731. System of Jussieu; 732. 



Lecture lix. On animal life; 

 733. 



Classification of aninuils, according to Linn^ ; 733. 

 Mammalia; Birds; 734. Amphibia; Fishes; 735. 

 Insects; 736. Vermes; 737. Senses; Nutrition; 738. 

 Nervous system; 739. Nature of the nerves; Dis- 

 *asesj 740. Natural cures; 741. 



Lecture lx. On the history of 

 terrestrial physics ; 742. 



General retrospect ; Knowledge of the ancients ; 

 742. Chinese; Numa; Tliales; Anaximander; Anaxi- 

 menes; 743. Pyth.igoras; Anaxagoras; Democritus; 

 Heraclitus; Plato; 744. Aristotle; Epicurus; 745. R. 

 Bacon; Discovery of tlie compass; Gesner; Aldro- 

 vandus ; Gilbert of Colchester ; 746. Variation of 

 the compass; F.Bacon; Opinions of heat; Drebel ; 

 747. Harvey ; Circulation of the blood ; Barometer ; 

 Bauhins; Ray; Willughby ; 748. Philosophical so- 

 cieties; Variation charts; 749. Electricity; Lin- 

 nean system ; Discoveries respecting heat ; 750. 

 Theory of magnetism and electricity; Boscovich; 

 Hygrometry; 751. Galvanism; Pile of Volta ; 752. 

 Mr. Davy's experiments; Dalton; Rumford; 753. 

 Herschel ; Leslie ; Capillary tubes ; Laplace ; 754. 

 Advantages to be expected from modern institutions ; 

 755. Chronological table; 756. 



EXPLANATION OF THE PLATES; 757- 



