CONTENTS. 



PAGR 



Art. I. Is it possible, in the present state of our knowledge, 

 to foretel what Weather it will be at a given 

 time and place ? Have we reason, at all events, to 

 expect that this problem will one day be solved,? 

 By M. Arago, Perpetual Secretary of the French 

 Academy of Sciences, &c. &c. : — 



State of the weather cannot be predicted — Limits of 

 the Mean Temperature of years, &c. — Effects of Arc- 

 tic Ice on the Climate of Europe — Temperature of 

 the Sea as affected by diminished Transparency — 

 Effects of Localities on Climates — Obscurations of 

 the Atmosphere — Effects of Woods on Climates — 

 Effects of Lakes on Climates — Atmospherical Elec- 

 tricity — Rain — Earthquakes — Kindling fires to pro- 

 ^ duce rain, ..... 1 



n . On the Ichthyological Fossil Fauna of the Old Red 

 Sandstone. By Professor Agassiz : — 



Zoological Sytems — Geological Epochs — Development 

 of Animality — Real Affinities in the Animal King- 

 dom — Con temporary Appearance of the Classes of In- 

 vertebrate Radiata, viz., — Acephala — Gasteropods — 

 Cephalopods- — Articulata — Infusoria — Nothingness 

 of Material and Pantheistical Theories — Earliest 

 Fishes — Value of Geological Formations — Probable 

 Number of Fossil Fishes — Complete Fossil Fish 

 Fauna — Reign of Fishes — Embryonic state of the 

 Oldest Fishe8--<-No Vertebras in Old Red Sandstone 



