CONTENTS. 



Art. I. Observations, chiefly Meteorological, made at 

 Ambleside, Westmoreland, in 1843-4-5. By 

 John Davy, M.D., F.R.S., Lond. and Ed., 

 Inspector-General of Army Hospitals, L.R. 

 Communicated by the Author, 



PAGE 



15 

 16 



1. Effects of Radiation, ..••*■ 



2. Formation of Ground-ice, . . • I 



3. Former existence of Glaciers in Cumberland, . 10 



4. Dew, ...•••!'* 



5. Hoar-Frost, • • • • 



6- Fog 



7. Quantity of Falling Rain, . . . xo 



8. Beauty of the Lake District, . • .19 



II. On the Unity of the Human Species. By M. 



Marcel de Serres, . . • 20 



III. On Mineralogical Classification. By Professor 



Carl Friedrich Naumann, . • 29 



Systematic Arrangement of Mineral Species, . 40 



IV. Note on the Vaporization of Mercury. By 

 John Davy, M.D., F.R.S., &c. Communi- 

 cated by the Author, . . • 49 



V. Examination of the Views adopted by Liebig 



on the Nutrition of Plants. By William 

 Seller, M.D., one of the Vice-Presidents of 

 the Botanical Society of Edinburgh. Com- 

 municated by the Author, ... 50 



VI. Researches in Elucidation of the Distribution 



of Heat over the Globe, and especially of the 

 Climatic Features peculiar to the Region of 

 the United States, with a Map and Plate. By 



