PROCEEDINGS OF 

 THE ROYAL SOCIETY. 



VOL. XX.VI. 



CONTENTS. 



April 12, 1877. 



PAGE 



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

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

 College, Birmingham 127 



II. On the Kapidity of Growth and Variability of some Madeepoeabia on an 

 Atlantic Cable, with remarks upon the rate of accumulation of Foraminiferal 

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



III. On Attraction and Repulsion of Bubbles by Heat. By Waltee Noel 



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



IV. On the Constant Vibration of Minute Bubbles. By Waltee Noel Haetley, 



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



April 19, 1877. 



I. On Putrescent Organic Matter in Potable Water. By Gustav Bischop . 152 



II. 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 



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

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

 F.C.S., Professor of Experimental Science, and Geobge Sydenham Claeke, 

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

 neering College, Cooper's Hill 157 



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