PHILOSOPHICAL TRANSACTIONS. 



Contents op Part II, 1879. 



XIII. On the Precession of a Viscous Spheroid, and on the remote History of the 



Earth. By G. H. Darwin. 



XIV. Problems connected with the Tides of a Viscous Spheroid. By Gr. H. 



Darwin. 



XV. The Croonian Lecture. — On the Structure and Development of the Skull 

 in the Lacertilia. — Part I. On the Skull of the Common Lizards 

 (Lacerta agilis, L. viridis, and Zootoca vivijpard). By William 

 Kitchen Parker. 



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. 



XVII. On the Origin of the Parallel Roads of Lochaber and their Bearing on 

 other Phenomena of the Glacial Period. By Joseph Prestwich. 



XVIII. On certain Dimensional Properties of Matter in the Gaseous State. — Part 

 I. Experimental Researches on Thermal Transpiration of Grases through 

 Porous Plates and on the Laws of Transpiration and Impulsion, includ- 

 ing an Experimental Proof that Gas is not a continuous Plenum. — 

 Part II. On an Extension of the Dynamical Theory of Gas, which in- 

 cludes the Stresses, Tangential and Normal, caused by a varying Condition 

 of Gras, and affords an Explanation of the Phenomena of Transpiration 

 and Impulsion. By Osborne Reynolds. 



PHILOSOPHICAL TRANSACTIONS, 

 Part II, 1879, price £1 12*. 



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

 Transit of Venus Expeditions. Price £3. 



Sold by Harrison and Sons. 



Separate copies of Papers in the Philosophical Transactions, commencing with 1875 

 may be had of Triibner and Co., 57, Ludgate Hill. 



