xxviii 



II. "Note on a Means of Producing a High-Voltage Continuous or 

 1 Pertinacious ' Current." By Sir OLIVER LODGE, F.R.S. 



III. " The Effect of Liquid Air Temperatures on the Mechanical and 



other Properties of Iron and its Alloys." By Sir JAMES 

 DEWAR, F.R.S., and R. A. HADFIELD. 



IV. " The Role of Diffusion during Catalysis by Colloidal Metals and 



Similar Substances." By Dr. H. J. S. SAND. Communicated 

 by Professor J. H. POYNTING, F.R.S. 



December 15, 1904. 

 Sir WILLIAM HUGGINS, K.C.B., O.M., President, in the Chair. 



A List of the Presents received was laid on the table, and thanks 

 ordered for them. 



The following Papers were read : 



I. "On the Ultra-Violet Spectrum of Gadolinium." By Sir 

 WILLIAM CROOKES, F.R.S. 



II. " An Analysis of the Results from the Falmouth Magnetographs 

 on < Quiet ' Days during the Twelve Years 18911902." By 

 Dr. C. CHREE, F.R.S. 



III. "The Halogen Hydrides as Conducting Solvents. Part III. 



Preliminary Note." By B. D. STEELE. Communicated by 

 Sir WILLIAM RAMSAY, K.C.B., F.R.S. 



IV. "The Halogen Hydrides as Conducting Solvents. Part IV. 



Preliminary Note." By B. D. STEELE, D. MC!NTOSH, and 

 E. H. ARCHIBALD. Communicated by Sir WILLIAM RAMSAY, 

 K.C.B., F.R.S. 



V. " Effects of Temperature and Pressure on the Thermal Conduc- 



tivities of Solids. Part I. The Effect of Temperature on the 



Thermal Conductivities of some Electrical Insulators." By 



Dr. C. H. LEES. Communicated by Professor A. SCHUSTER, 



F.R.S. 

 VI. " The Basic Gamma Function and the Elliptic Functions." By 



Rev. F. H. JACKSON, R.N. Communicated by Professor 



A. R. FORSYTH, F.R.S. 

 VII. " On the Normal Series Satisfying Linear Differential Equations." 



By E. CUNNINGHAM. Communicated by Dr. H. F. BAKER, 



F.R.S. 



The Society adjourned over the Christmas recess to Thursday, 

 January 19, 1905. 



