CONTENTS OF VOL. XXXII. FOURTH SERIES. Vll 



Page 

 Mr. R. Templeton's Remarks suggesting doubts respecting the 

 received value of \x, the Index of Refraction of the Lens 



(With a Plate.) 425 



Mr. C. Brooke on the Dynamical Theory of Electricity 433 



Prof. Sylvester on a Memoria Technica for Delambre's, com- 

 monly called Gauss's Theorems 436 



Mr. J. B. Lawes and Dr. J. H. Gilbert on the Sources of the Fat 



of the Animal Body 439 



Prof. W. Beetz on the Influence of Magnetization on the Length 



and the Resistance of Iron Bars 45 1 



Prof. Sylvester's Note on the Properties of the Test Operators 

 which occur in the Calculus of Invariants, their Derivatives, 

 Analogues, and Laws of Combination ; with an incidental 

 application to the development in a Maclaurinian series of 

 any power of the Logarithm of an augmented Variable. ... 461 

 Proceedings of the Royal Society : — 



Prof. A. Matthiessen on the Expansion by Heat of Metals 



and Alloys 472 



Proceedings of the Geological Society : — 



Prof. Huxley on some remains of large Dinosaurian Reptiles 



from the Stormberg Mountains, South Africa 474 



Mr. J. B. Jukes on the Grouping of the Rocks of North 



Devon and West Somerset 475 



Note on the Use of the Differential Galvanometer in experiments 



on Radiant Heat, by M. P. Desains 476 



On Aqueous Vapour and Solar Radiation, by L. Soret 478 



On the Influence of the Earth's Rotation on the Deviation of 

 Projectiles from Rifled Cannon, by M. Martin de Brettes . . 478 



NUMBER CCXIX.— SUPPLEMENT. 



Mr. J. Gill on the Temperature of the Vapours of Boiling Sa- 

 line Solutions 481 



Mr. R. Templeton on the Augmentation of the Disk of the Sun 

 near the Horizon 488 



Mr. H. Holt on a Method of Calculating the Coefficients of the 

 Lunar Inequalities 490 



Mr. T. Graham on the Absorption and Dialytic Separation of 

 Gases by Colloid Septa 503 



Mr. C. Brooke's Remarks on the Nature of ^Ether 531 



Prof. Beetz on the Tones produced by Rotating Tuning-forks . 534 



Prof. Foster's Note on the foregoing Paper 539 



Prof. J. A. Wanklyn on Limited Oxidation 540 



Proceedings of the Royal Society : — 



Mr. J. N. Lockyer's Spectroscopic Observations of the Sun. 542 



Proceedings of the Geological Society : — 



The Rev. W. B. Clarke on marine fossiliferous deposits of 

 Secondary Age in New South Wales 544 



