iv List of the Contributors. 



Curtis, Arthur Hill, LL.D,, D.Sc. page 



On the Pressure of Earth against a Eetaining Wall, . 9 



Dixon, George Y., M.A. 



On Peachia hastata, ....... 399. 



Dreyer, J. L. E., Ph. D. 



Observation of the Transit of Venus, 1882, December 6th, 



made at the Armagh Observatory, .... 49 



England, Professor. 



Notes of the Transit of Venus, 1882, as seen at the 

 Crawford Observatory, Cork, December 6th, 1882, . 47 



Erck, Wentworth, LL.D. 



On an Abnormal Solar Spot, ..... 491 



Fitzgerald, George Francis, M.A., F.T.C.D., F.R.S. 



On Dr. Eddy's Hypothesis that Radiant Heat is an 



Exception to the Second Law of Thermodynamics, . 67 



Note on Dust Repulsion, 338 



On Currents of Gas in the Vortex Atom Theory of Gases, 339 



On a Method of Studying Transient Currents by means 



of an Electro-dynamometer, ..... 341 



On a Non-sparking Dynamo, ..... 343 



On a Model Illustrating some Properties of the Ether, . 406 



On an Analogy between Electric and Thermal Phe- 

 nomena, ......... 439 



Note on the Specific Heat of the Ether, . . . 477 



On some Methods of Measuring the Densities of Gases, . 481 



Grubr, Howard, M.E., F.R.S. 



Note on the Effect of Flexure on the Performance of 



Telescopic Objectives, ...... 149 



Notes on the Construction of Turret Clocks, . . . 446 



