CONTENTS. YU 



Dr. M'Intyres Remarks on an Article in the Philosophical 

 Magazine and Annals for March, in which it is attempted 

 to demonstrate the Truth of Mr. Drummond's Rule for cal- 

 culating the relative Importance of certain Boroughs 360 



Proceedings of the Geological Society 362 



— ■ Linnsean Society 387 



• Chelmsford Philosophical Society 393 



Meeting of the British Association for the Advancement of 



Science at Oxford, June 1832 394> 



New Substance procured from Opium, by J. P. Couerbe — M. 



Serullas on Bromide of Silicium, &c 395 



Destruction of Fresh-water Fish by the Admission of the Sea 



into a Lake 397 



Errors in the Planetary Distances for 1833 398 



New Patents — Occultations of Planets and Fixed Stars by the 

 Moon, in May 1832. Computed for Greenwich, by T. Hen- 

 derson, Esq. ; and circulated by the Astronomical Society. . 399 

 Meteorological Observations 400 



NUMBER LXVI.— JUNE. 



Page 

 On the Electro-motive Force of Magnetism, by Signori Nobili 

 and Antinori, (from the Antologia, No. 131); with Notes by 



Mr. Faraday 401 



Prof. Encke on the Calculation of the Orbits of Double Stars 414 



Mr. R. Phillips's Letter to Dr. D. B. Reid 420 



Prof. Hare's Description of the Laboratory and Lecture-Room 

 in the Medical Department of the University of Pennsyl- 

 vania 426 



Description of Crow's Seaman's Octant and Traverse Worker 428 



Rev. G. Phillips on the Summation of Series 435 



New Books: — The Dublin Journal of Medical and Chemical 



Science 442 



Proceedings of the Royal Society 445 



Linnaean Society 455 



Zoological Society 456 



Royal Institution of Great Britain 462 



Magneto-Electricity — Ordnance Geological Survey of Devon- 

 shire — Chemical Action of Light, and Formation of Hum- 



boldtine 466 



Preparation of the Iodides of Barium and Strontium 467 



Chemical Pathology of Cholera 468 



Mr. M'Kenzie's Observations on Glaucoma 470 



Occultations of Planets and fixed Stars by the Moon, in 

 June 1832. Computed for Greenwich, by T. Henderson, 



Esq ; and circulated by the Astronomical Society 471 



Meteorological Oboervations 472 



