[ ir ] 
IX. On the Microvheometer. By J. B. Hannay, F.R.S.E., F.C.S., lately Assistant 
Lecturer on Chemistry in Owens College, Manchester. Communicated by 
H. E. PiOSCOE, Ph.D., Professor of Chemistry in Owens College, Man¬ 
chester . page 275 
X. An Experimental Determination of the Values of the Velocities of Normal Pro¬ 
pagation of Plane Waves in different directions in a Biaxal Crystal, and a 
Comparison of the Results with Theory. By Pt. T. Glazebrook, B.A., Fellow 
of Trinity College, Cambridge. Communicated by J. Clerk Maxwell, M.A., 
F.R.S. .287 
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, M.A., Fellow of Trinity College, Cambridge. Communicated 
by J. W. L. Glaisher, M.A., F.R.S .379 
XII. Measurements of Electrical Constants. —No. II. On the Specific Inductive 
Capacities of Certain Dielectrics. —Part I. By J. E. H. Gordon, B.A. Cantab, 
Assistant Secretary of the British Association. Communicated by Professor 
J. Clerk Maxwell, F.R.S .417 
PAPvT II. 
XIII. On the Precession cf 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.R.S. .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 
XY. 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 vivipara). By William Kitchen Parker, F.R.S. . 595 
XYI. 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 
XYII. On the Origin of the Parallel Roads of Locliaber and their Bearing on other 
Phenomena of the Glacial Period. By Joseph Prestwick, M.A., F.R.S., 
F.G.S., Professor of Geology in the University of Oxford . 663 
