PHILOSOPHICAL TRANSACTIONS. 



Contents of Part I, 1879. 



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

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



%^I>On the Spectra of Metalloids — Spectrum of Oxygen. By Arthur Schuster. 

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

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

 Thomson. 



IY. On Repulsion resulting from Radiation. — Part VI. By William Crookes. 

 Y. The Bakerian Lecture. — On the Illumination of Lines of Molecular Pressure, 



and the Trajectory of Molecules. By William Crook es. 

 YI. On the Sensitive State of Electrical Discharges through Rarefied Oases. By 



William Spottiswoode and J. Fletcher Moulton. 

 VII. On Stresses in Rarefied Gases 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. N. Hartley and A. K. Huntington. 

 IX. On the Microrheometer. By J. B. Hannat. 



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. Glazebrook. 

 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. 



PHILOSOPHICAL TRANSACTIONS, 

 Part I, 1879, price £2. 



Extra volume (vol. 168) containing the Reports of the Naturalists attached to the 

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