CONTENTS. 



PAGE 



Art. I. Inaugural Lecture, the General Bearing of the Great 

 Exhibition on the Progress of Art and Science. 

 By William Whewell, D.D., F.R.S., Master of 

 Trinity, ...... 1 



II. On the Infusoria and other Microscopic Forms in Dust- 

 showers and Blood-rain. By Dr C. G. Ehrenberg, 24 

 Showers of Blood, ..... 29 



III. Singing Birds and Sweet Flowers in Jamaica, . 31 



IV. I. Coral Reefs and Islands. II. The Structure, 



Growth, and Habits of Coral Zoophytes. By 

 James D. Dana, Esq., Naturalist to the Ameri- 

 can Exploratory Expedition, ... 33 



I. Coral Reefs and Islands — 



1. General Features of Coral Reefs and Islands, 33 

 II. Structure, Growth, and Habits of Coral Zoophytes — 



1. Structure and Growth of Zoophytes, . . 36 



2. Texture and Composition of Corals, . . 46 



3. Causes influencing the Growth of Coral Zoophytes, 50 



4. Rate of Growth of Zoophytes, ... QQ 



V. On the Colour of the Rocks in the Lake District of 

 the North of England. By John Davy, M.D., 

 F.R.S., &c. Communicated by the Author, 62 



VI. Some views respecting the Source of Light, &c. By 



James Nasmyth, Esq., F.R.A.S.. . 65 



