CONTENTS. Vii 



Page 



Election of Mr. R. Brown as a Foreign Member of the Royal 

 Academy of Sciences of Paris — Occultations of fixed Stars 

 by the Moon, in June 1833 407 



Meteorological Observations 408 



NUMBER XII.— JUNE. 



Mr. E. W. A. D. Hay's Notices of certain Plants of Marocco, 

 Specimens of which were transmitted to the Horticultural 

 Society in 1831 ; with Remarks on the Arar or Gum San- 

 darach Tree, and an Inquiry respecting the Cedar of the An- 

 cients 409 



Mr. J. F. W. Johnston on Iodic iEther 415 



Prof. G. B. Airy's Remarks on Sir David Brewster's Paper " On 

 the Absorption of Specific Rays, &c." 5 — in a Letter to Sir 



D. Brewster 419 



Rev. B. Powell's Remarks on Mr. Barton's Paper " On the In- 

 flexion of Light," in the London and Edinburgh Journal of 



Science, &c. No. 10 . , . . 424 



Mr. J. Scrymgeour's Narrative of Experiments made with the 

 Seconds Pendulum, principally in order to determine the 

 hitherto unassigned Amount of the Influence of certain minute 



Forces on its Rate of Motion 434 



Mr. G. O. Rees on separating the Phosphates of Lime and Mag- 

 nesia « . 442 



Mr. J. O.Westwood's Descriptions of several new British Forms 



amongst the Parasitic Hymenopterous Insects 443 



Mr. B. Bevan on the Modulus of Elasticity of Gold 445 



Mr. W. Sturgeon on the Theory of Magnetic Electricity .... 446 

 Prof. G. B. Airy's Results of the Repetition of Mr. Potter's Ex- 

 periment of interposing a Prism in the Path of Interfering 



Light 451 



Mr. H. F. Talbot's Remarks upon an Optical Phenomenon 



seen in Switzerland 452 



Rev. T. J. Hussey's Catalogue of Comets {continued.) 453 



New Books : — Report of the First and Second Meetings of the 

 British Association for the Advancement of Science ; at 

 York in J 831, and at Oxford in 1832: including its Pro- 

 ceedings, Recommendations, and Transactions 455 



Proceedings of the Royal Society 464 



Geological Society 466 



. Royal Astronomical Society 475 



Zoological Society 476 



M. Baup on Kinic Acid and some Kinates 479 



Analysis of Asparagin and Aspartic Acid 481 



Mr. B. Bevan on Covent-Garden Measures 482 



Correction in Mr. Enys's Paper on the Granite of Penryn — 

 Temperature and Humidity in February and March — Oc- 



