CONTENTS. 
PART II. 
XIII. On the Precession of a Viscous Spheroid, and on the remote History of the 
Earth. By G. H. Darwin, M.A., Fellow of Trinity College, Cambridge. 
Communicated by J. W. L. Glaisher, M.A., F.P.S. . page 447 
XIV. Problems connected with the Tides of a Viscous Spheroid. By G. H. Darwin, 
M.A., Fellow of Trinity College, Cambridge. Communicated by J. W. L. 
Glaisher, M.A., F.R.S. .. 539 
XV. The Croonian Lecture. — On the Structure and Development of the Shull in the 
Lacertilia. —Part I. On the Shull of the Common Lizards (Lacerta agilis, L. 
viridis, and Zootoca vivipara). By William Kitchen Parker, F.R.S. . 595 
XVI. Contributions to Molecular Physics in High Vacua. Magnetic Deflection of 
Molecular Trajectory.—Laws of Magnetic Rotation in High and Low Vacua. 
— Phosphorogenic Properties of Molecular Discharge. By William Crookes, 
F.R.S . . . 641 
XVII. On the Origin of the Parallel Roads of Lochaber and their Bearing on other 
Phenomena of the Glacial Period. By Joseph Prestwich, M.A., F.R.S., 
F.G.S., &c., Professor of Geology in the University of Oxford .... 663 
XVIII. On certain Dimensional Properties of Matter in the Gaseous State .— Part I. 
Experimental Researches on Thermal Transpiration of Gases through Porous 
Plates and on the Laws of Transpiration and Impulsion, including an Experi¬ 
mental Proof that Gas is not a continuous Plenum. — Part II. On an Extension 
of the Dynamical Theory of Gas, which includes the Stresses, Tangential and 
Normal, caused by a varying Condition of Gas, and affords an Explanation of 
the Phenomena of Transpiration and Impulsion. By Osborne Reynolds, 
M.A., F.R.S., Professor of Engineering in Owens College, Manchester . 727 
Index . 
847 
