CONTENTS OF VOL. I. FOURTH SERIES. IX 



Page 



Proceedings of the Royal Society 498 



Royal Institution of Great Britain 508 



Obituary.— Richard Phillips, Esq., F.R.S. &c 514 



On the Polarization of the Chemical Rays which exist in 



Solar Light, by Prof. E. Wartmann 515 



On the Quantitative Estimation of Manganese, by R. Laming 517 

 Remarks upon a recently found mass of Meteoric Iron, by G. 



Rose - 517 



Method of obtaining Oxygen from Atmospheric Air, by M. 



Boussingault 518 



On Gilding Porcelain 518 



Separation of the Protoxide and Peroxide of Copper, by H. Rose 518 



Meteorological Observations for April 1851 519 



Table 520 



NUMBER VII.— SUPPLEMENT TO VOL. I. 



Prof. Boole on the Theory of Probabilities, and in particular on 



Mitchell's Pi-oblem of the Distribution of the Fixed Stars . . 521 

 M. J. Plateau on some nevi^ and curious applications of the 



Permanence of Impressions on the Retina 531 



Mr. T. S. Davies on Geometry and Geometers 536 



Dr. Tyndall on the Progress of the Physical Sciences : — On the 

 Velocity of Light. — Experimental Proof of the Theory of Un- 

 dulation 544 



Mr. W. J. M. Rankine on the Law of the Compressibility of 



Water at different Temperatures 548 



M. E. Wilde on the Gyreidometer, an Instrument suited to the 

 exact Measurement of Newton's Rings. (With a Plate.) . . 550 



Mr. T. G. Bunt on Pendulum Experiments 552 



The Rev. J. A. Coombe on the Rotation of the Earth 554 



The Rev. S. Haughton on Professor Potter's Theory of Sound 560 



Proceedings of the Royal Institution 561 



Cambridge Philosophical Society 565 



. Royal Society 568 



Physical Demonstration of the Earth's Motion of Rotation, by 



means of the Pendulum, by M. L. Foucault 575 



On the Electric Currents which exist in Vegetables, by Prof. E. 



Wartmann 578 



An instance of the Development of Electrical Action in a Factory, 



by W. M. Buchanan 581 



Discovery of a New Planet, by J. R. Hind 582 



Discovery of a new Metal, by Dr. Bergemann 583 



Mode of distinguishing Artificial from Natural Camphor, by J. 



W. Bailey 586 



On the Detection of Sulphur, by J. W. Bailey 586 



Index 587 



VhiL May. S. 4. No. 7. Suppl Vol. 1. b 



