PHILOSOPHICAL TRANSACTIONS. 



Contents of Part I, 1879. 



I. On the Bodily Tides of Viscous and Semi-elastic Spheroids, and on the Ocean 

 Tides upon a Yielding Nucleus. By Gr. H. Darwin. 



II. On the Spectra of Metalloids— Spectruni'of Oxygen. By Arthur Schuster. 



III. Electrodynaniic Qualities of Metals. — Part VII. Effects of Stress on the 



Magnetization of Iron, Nickel, and Cobalt. By Professor Sir William 

 Thomson. 



IV. On Eepulsion resulting from Eadiation. — Part VI. By William Crootces. 



V. The Bakerian Lecture. — On the Ilhunination of Lines of Molecular Pressure, 

 and the Trajectory of Molecules. By William Crookes. 



VI. On the Sensitive State of Electrical Discharges through Rarefied Grases. By 

 William Spottiswoode and J. Fletcher Moulton. 



VII. On Stresses in Rarefied Gfases arising from Inequalities of Temperature. By 

 J. Clerk Maxwell. 



VIII. Researches on the Action of Organic Substances on the Ultra-violet Rays of 

 the Spectrum. By W. 1ST. Hartley and A. K. Huntington. 



IX. • On the Microrheometer. By J. B. Hannay. 



X. An Experimental Determination of ^the Values of the Velocities of Normal 

 Propagation of Plane Waves in different directions in a Biaxal Crystal, and 

 a Comparison of the Results with Theory. By R. T. G-lazebrook. . 



XI. On certain Definite Integrals occurring in Spherical Harmonic Analysis and 



on the Expansion, in Series, of the Potentials of the Ellipsoid and the 

 Ellipse. By W. D. Niven. 



XII. Measurements of Electrical Constants. — No. II. On the Specific Inductive 



Capacities of Certain Dielectrics. — Part I. By J. E. H. Gordon. 



