CONTENTS. 



Oil the Practicahillty of a direct Passage over the North Pole. 



294, 3B0 



On thejirst Principles of Music. ., ,. . . . . 306 



On the Geological Histortj of Loch Lomond. . . . , 327 



Description of Mr.W^^s.^ Tritton's improrved Apparatus for 

 Distillation. .. ,, .. .. .. .. 352 



Accoimt of a Shower of Meteoric Stones ivhichfell in the Covnty 

 of Limerick. . . . . . . . . . . . . 355 



Observations on the Letter of Mr. Friedlander on the actual 

 State of Magnetism in Germany. .. .. .. 358 



Observations and Experiments on oxy sulphuretted M7iriatic 

 Acid 366 



On the Kaleidoscope. . , . . . . . . . . 376 



On the Pressure of theEarlh against Revetements and Retaining 

 Walls 401 



On the Seeds of Plants 404 



On a neuu Mode of Artificial Congelation. ,. ,, 411 



On the Height of the Aurora Borealis from the Earth. 422 



On the Necessity of Animal Decay. , , . . . . 423 



Experiments made in France upon the Use of distilled Sea- 

 IVater for domestic Purposes, a?id its Effects upon the Con-' 

 siitution when taken as a Beverage. . . . , . . 433 



On the Dry-Rot. 435 



On the Electric Properties of Metals, and the absolute Positive 

 and Negative Electric Powers of various Substances. 438 



Process practised in the Establishment of Syoise sur Seine to 

 extract Finegar or Acetic Acid from Wood. . . . . 439 



On a new and expeditious Method of naming at sight the Roots 

 of complete Cubes under Ten Figures. .. .. 443 



Uhtory of Dr. Brewster's Kaleidoscope, with Remarks on 

 its supposed Resemblance to other Combinations of plain 

 Mirrors, , , , , , , , , , . , , 445 



