CONTENTS. 



PAGE 



ciety of France, &c. Communicated by the 

 Author, 68 



VIII. Arctic Natural History, 



1. Cause of Intense Thirst in Arctic Regions, 72 



2. Thickness of the Ice, . . . . 73 



3. Warmth of Snow-Burrows, . . . 74 



4. Snow a had conductor of Sound, . . 74 



5. The Breaking up of an Iceberg, . . 75 



6. Refrigerating power of Icebergs, . . 75 



7. The Droppings of Eider Ducks, . . 76 



8. Arctic Minute Animal and Vegetable Forms and 



Colour of the Sea, .... 76 



9. On the Flesh of little Auks or Rotges and Sea- 



Fowl generally, ... . 78 



10. Red Snow, 79 



11. On the Colouring Matter of Marine Algae. By 



Dr Dickie, 79 



12. Nostoc Arcticum (Berk). By Dr Dickie, 81 



13. On the Magnitude of Arctic Glaciers — and their 



advance towards and termination in the Sea, 82 



14. Ice and Sea- Water Coloured by the Diatomaceae, 82 



IX. On an Improvement in Sikes' Self-Registering 

 Thermometer. By Richard Adie, Esq., Li- 

 verpool. Communicated by the Author. (With 

 a Plate), 84 



X. Memoir of the late Dr Thomas Thomson, F.R.S., 

 M.W.S., &c, Professor of Chemistry in the 

 College of Glasgow. Communicated by his re- 

 lative, Dr R. Dundas Thomson, . . 86 



XI. On the Reconcentration of the Mechanical Energy 

 of the Universe. By William John Mac- 

 quorn Rankine, C.E., F.R.S.E., . . 98 



XII. The Classification of Insects from Embryological 



Data. By Professor Agassiz, . . .101 



XIII. Humboldt, one of the first Philosophers who de- 

 livered Popular Courses of Lectures on Science 

 to the People, 110 



XIV. Professor Oken, the originator of the now Popu- 

 lar Assemblies for the Advancement of Science, 112 



