CONTENTS OF VOL. XL. FIFTH SERIES. 



Vll 



NUMBER OCXLVIL— DECEMBER. 



Page 

 Mr. William Sutherland on Molecular Force and the Surf ace- 

 Tension of Solutions 477 



Prof. S. W. Holman on Galvanometer Design. Waste Space 



near the Needle 494 



Prof. T. Mizuno on Tinfoil Grating as a Detector for 



Electric Waves 497 



Prof. John Perry and Mr. H. F. Hunt on the Development 



of Arbitrary Functions 506 



Prof. J. J. Thomson on the Relation between the Atom and 



the Charge of Electricity carried by it 511 



Proceedings of the Geological Society : — 



Sir Henry H. Howorth on the Chalky Clay of the 

 Fenland and its Borders : its Constitution, Origin, 



Distribution, and Age 544 



Mr. T. Crosbee Cantrill on the Occurrence of Spirorbis- 

 Limestone and Thin Coals in the so-called Permian 

 Rocks of Wyre Forest ; with Considerations as to the 

 Systematic Position of the " Permians " of Salopian 



Type . . . t , 545 



Prof. T. G. Bonney on the Serpentine, Gneissoid, and 



Hornblendic Rocks of the Lizard District 546 



Dr. J. W. Gregory on the " Schistes Lustres " of Mont 



Jovet (Savoy) * 547 



On the Wave-length of the D 3 Helium Line, by A. Deforest 

 Palmer, Jr 547 



Index 549 



