iv 



Studies in the Chinoline Series. — I. Transformation of Leucoline into Ani- 

 line. By Prof. James Dewar, M.A 60 



On the Density of Solid Mercury. By Prof. J. W. Mallet, University of 

 Virginia 71 



The Automatic Action of the Sphincter Ani. By W. R. Gowers, M.D., 

 Assistant Physician to University College Hospital 77 



Description of the Process of Verifying Thermometers at the Kew Obser- 

 vatory. By Francis Galton, F.B^S 84 



March 22, 1877. 



On Stratified Discharges. — IV. Stratified and Unstratified Forms of the Jar- 

 Discharge. By William Spottiswoode, M. A., Treas. B.S 90 



On Friction "between Surfaces moving at Low Speeds. By Fleeming Jenkin, 

 F.R.SS. L. & E., Professor of Engineering in the University of Edinburgh, 

 and J. A. Ewing 93 



Magnetic Observations at Kerguelen. By the Rev. S. J. Perry, S. J., F.R.S. 95 



On the Variations of the Daily Range of the Magnetic Declination as re- 

 corded at the Kew Observatory. By Balfour Stewart, LL.D., F.R.S., 

 Professor of Natural Philosophy at Owens College, Manchester 102 



List of Presents 121 



No. 180.— April 12, 1877. 



On certain Molecular Changes which occur in Iron and Steel during the 

 separate acts of Heating and Cooling. By Professor Norris, M.D., Queen's 

 College, Birmingham 127 



On the Rapidity of Growth and Variability of some Madeepoeaeia on an 

 Atlantic Cable, with remarks upon the rate of accumulation of Foramini- 

 feral Deposits. By Prof. P. Martin Duncan, F.R.S., Pres. Geol. Soc. . . 133 



On Attraction and Repulsion of Bubbles bv Heat. Bv Walter Noel Hartley, 

 FR.S.E., F.C.S., King's College, London 137 



On the Constant Vibration of Minute Bubbles. By Walter Noel Hartley, 

 F.R.S.E., F.C.S., King's College, London 150 



April 19, 1877. 



On Putrescent Organic Matter in Potable Water. By Gustav Bischof . . . . 152 



On a Cause for the Appearance of Bright Lines in the Spectra of Irresolvable 

 Star-Clusters. By E. J. Stone, M.A., F.R.S., Her Majesty's Astronomer, 

 Cape of Good Hope ". 156 



On some Figures exhibiting the Motion of Vibrating Bodies, and on a New 

 Method for determining the Speed of Machines. By Herbert M'Leod, 

 F.C.S., Professo: of Experimental Science, and George Sydenham Clarke, 

 Lieut. R.E., Instructor in Geometrical Drawing in the Royal Indian En- 

 gineering College, Cooper's Hill 157 



