CONTENTS OF VOL. XXVIII. FOURTH SERIES. Vll 



Page 

 Proceedings of the Royal Society : — 



Prof. Stokes on the Reduction and Oxidation of the Co- 

 louring Matter of the Blood 391 



Influence of Heat-force on Vegetable Life, by George Bentham, 



F.R.S., President of the Linnaean Society 400 



Analysis of Langite, a new Mineral from Cornwall, by M. Pisani. 403 

 On the History of Energetics, by Prof. Rankine, LL.D.,F.R.S. 404 

 On the Temperature of Sea-water, by M. Charles Martins. . . . 405 



On the Ancient Aqueduct of Alatri, by Father Secchi 406 



Phenomena observed in the Spectra produced by the Light of 

 Induction-Currents in traversing Rarefied Gases, by M. J. 

 Chautard 408 



NUMBER CXCI.— DECEMBER. 



Prof. Lorenz on the Theory of Light. — Second Memoir 409 



Prof. Norton on Molecular Physics 425 



M. G. Vander Mensbrugghe on some curious Effects of the 



Molecular Forces of Liquids 434 



Prof. Tyndall's Contributions to Molecular Physics. Being the 



Fifth Memoir of Researches on Pvadiant Heat 438 



Prof. Donkin on certain statements in Elementary Works con- 

 cerning the Specific Heat of Gases , 458 



Mr. C. J. Monro on the Nomenclature of the Physical Sciences. 461 

 Prof. Church on Tasmanite, a new Mineral of Organic Origin. 465 



Dr. C. K. Akin on the History of Force 470 



Proceedings of the Royal Society : — - 



Comparison of Mr. W. De la Rue's and Padre Secchi's 



Eclipse Photographs, by Warren De la Rue, F.R.S. . . 477 



A Letter from John Davy, M.D., F.R.S., to the Editors of the 



Philosophical Magazine in reply to certain charges made by 



C. Babbage, Esq., F.R.S., &c, against the late Sir Humphry 



Davy, when President of the Royal Society 480 



On the Comparison between the English and Metrical Readings 



in Double-scale Barometers, by W. Mathews, Jun 484 



On the Spectrum of Jupiter, by Father Secchi 486 



NUMBER CXCII.— SUPPLEMENT. 



Prof. Challis on the Dispersion of Light 489 



Prof. Maskelyne and Dr. Lang's Mineralogical Notes. (With a 



Plate.) 502 



Prof. Tyndall's Contributions to Molecular Physics. Being the 



Fifth Memoir of Researches on Radiant Heat 508 



MM. Pelouze and Maurey on Gun-cotton, with reference to the 



New Methods of General Baron von Lenk for preparing and 



employing this Substance 535 



