CONTENTS. 



PAGE 



Art. I. The Natural Relations between Animals and the 

 Elements in which they live. By Professor Louis 

 Agassiz, . . . . . . 193 



Introductory. — 1. General View of the Radiata. — 



2. General View of Mollusca. — 3. General view of 



Articulata. — Magnitude of Animals. — General View 



• of Vertebrata, 1. Fishes.— 2. Reptiles.— 3. Birds.— 



4. Mammals. — General conclusion, . 193—227 



II. On the Presence of Fluorine in Blood and Milk. 

 By George Wilson, M.D., F.R.S.E. Com- 

 municated by the Author, . . . 227 



III. On the extent to which Fluoride of Calcium is soluble 



in water at 60° F. By George Wilson, M.D., 

 F.R.S.E. Communicated by the Author, . 230 



IV. Memoranda regarding an Ancient Iron Boat-Hook 



found in the Carse of Gowrie. By R. Chambers, 

 F.R.S.E. and V.P.S.A.Sc. Communicated by the 

 Author, 233 



V. On the Causes which Influence the Changes of Iso- 

 thermal Lines. By Mr Richard Adie. Com- 

 municated by the Author, . . . 236 



VI. On British Eocene Serpents and the Serpent of the 



Bible. By Professor Owen, . . . 239 



