CONTENTS. 



SUPPLEMENT TO VOL. XXXIIL 



Engraving on the following Subject : Illustration of the Structure of the 

 Roots of Trees. By Mrs. Agnes Ibbetson. 



I. Observations on the Measurement of three Degrees of the Meridian, con- 

 ducted in England, by Lieutenant-Colonel William Mudge. By Don 

 Joseph Rodriguez. Frqm the Philosophical Transactions for 1812, 

 p. 321. - - - - - - 321 



IL On the Roots of Trees. By Mrs. Agnes Ibbetson. - - 334 



III. Popular Statement of the beautiful experiments of Malus, in which 

 he has developed a new property of light. - - _ 344. 



IV. Some Account of the Teak Tree of the East Indies. By Dr. William 

 Roxburgh. - - - - , _ 343 



V. On some Combinations of Phosphorus and Sulphur, and on some other 

 Subjects of Chemical Inquiry. By Sir Humphry Davy, Kt. LL.D. 

 Sec. R. S. - - - - - - 354 



Scientific News. ., « i, « * » 362 



A JOURNAL 



