440 CONTENTS. 



Page. 

 Eepoet on Atmospqehic Electricity, by M. F. Dupuez. Translated by Dr. L, D. 



Gale 290 



Part I. 

 The means used to judge of the electrical phenomena which take place in 



the atmosphere 290 



Chapter I. Electro-Atmospheric apparatus 290 



II. Use of Electro- Atmospheric apparatus 302 



Part II. 



Chapter I. Origin of Atmospheric Electricity « — 312 



II. Variations of Atmospheric Electricity in clear weather, 322 



III. Atmospheric electricity in overcast, foggy, and cloudy weather. 337 



IV. Atmospheric electricity during rain, snow, and storms 34t> 



Part III. 



Summary of our knowledge of lightning .- — 358 



Chapter I. Flashes of lightning 358 



IL Thunder : 363 



III. Principal effects produced by lightning at the surface of the earth 368. 

 Eeport of R^acENT PROGRESS IN PHYSICS, by Di. JoHN MuiiLER. Translated by Pro- 

 fessor George C. Schaeffer — ».- 372 



Electricity. Fifth section. The chemical effects of the current 372 



MISCELLANY. 



Estimate of the cost of establisiiikg meteorological stations in the bifferest 



States " 416 



Meteorological stations connected with the senior county grammar schools 



IN Upper Canada .. .... — _ 417 



Earthquake of 1811 at New Madrid, Missouri, from the narrative of an eye- 

 witness. By Timothy Dudley, of Jacksonville, Illinois 421 



Dispersion of a cloud by an electrical discharge. From D. W. Nam,l, of 



Sam ' s Creek , Maryland 425 



Communication from Dr. Egbert Hare on a method of forming small aveights — 426 



Plan of a bibliography. By Julius Friedlander ... 428 



Account of antiquities from Kentucky. By S. S. Lyon . 430 



Notes on barometer, rain and snow gages, &c. By E. H. Gardiner 432 



Snow-Gage. By W. E. Guest 433 



Observations on the opening and closing of Kfjvnebec river, Maine. By E. 



H. Gardiner ... 434 



Record of earthquakes felt at the collegiate seminary of Guatemala in 1857 



and 1858. By A. Canudas 43T 



Method of obtaining the amount of water in rivers. By Captain A. A. Hum- 

 phreys _ ,.. - 438 



