xxil CONTENTS. 



PAGB 



Electrolysis— Indestructibility of Force — Various Modes dis- 

 covered of Decomposing Substances — ^John Dalton, chemist — 

 Law of Definite Proportions — Law of Multiple Proportions — 

 Dalton's Atomic Theory — The Study of Organic Chemistry — 

 Liebig, the great teacher in Organic Chemistry . . . 362 



CHAPTER XXXVn. 



SCIENCE OF THE NINETEENTH CENTURY (CONTINUED). 



The Organic Sciences are too difficult to follow out in detail — 

 Jussieu's Natural System of Plants — Goethe proves the Meta- 

 morphosis of Plants — Humboldt studies the Lines of Average 

 Temperature on the Globe — Extends our knowledge of Physical 

 Geography — "Writes the 'Cosmos' — Death of Humboldt in 

 1858 . . . 380 



CHAPTER XXXVI n. 



SCIENCE OF THE NINETEENTH CENTURY (CONTINUED). 



The three Naturalists, Lamarck, Cuvier, and Geoffroy St.-Hilaire 

 — Cuvier begins the Museum of Comparative Anatomy — La- 

 marck's History of Invertebrate Animals — G. St.-Hilaire brings 

 Natural History Collections from Egypt — Lamarck on the 

 Development of Animals — G. St.-Hilaire on 'Homology,' or 

 the similarity in the parts of different animals— Cuvier's * Regne 

 Animal ' and his Classification of Animals — Cuvier on the Per- 

 fect Agreement between the Different Parts of an animal — He 

 Studies and Restores the Remains of Fossil Animals — His 

 * Ossemens Fossiles ' — Death of Cuvier — Von Baer on the Study 

 of Embryology — His History of the Development of Animals, 

 1828 . , 



CHAPTER XXXIX. 



SCIENCE OF THE NINETEENTH CENTURY (CONTINUED). 



Prejudices which retarded the study of Geology — Sir Charles 

 Lyell traces out the Changes going on now — Mud carried down 

 by the Ganges — Eating away of Sea-coasts — Eruption of Skap- 

 tar Jokul — Earthquake of Calabria— Rise and Fall of Land — 



