Xiv REPORT — 1898. 



TRANSACTIONS OF THE SECTIONS. 



Section A.— MATHEMATICAL AND PHYSICAL SCIENCE. 



THURSDAY, SEPTEMBER 8. *^^ 



Address by Professor W, E, Ateton, F.R.S., President of the Section 767 



1. Pepoi-t on Comparing and Reducing Magnetic Observations 777 



2. Lenses not of Glass. By J. W. Giffoed 777 



3. On the Articulation and Acoustics of the Spirate Fricative Consonant.*. 



By E. J. Lloyd, D.Lit., M.A., F.R.S.E 777 



4. On the Conservation of Energy iu the Human Body. By Edwaed B. 

 Rosa, and W. 0. Atwatee 778 



6. On a Pneumatic Analogue of the Potentiometer. By W. N. Shaav, 

 F.R.S •. 778 



FRIDAY, SEPTEMBER 9. 



1. Comparison between Charging a Secondary Cell at Constant Potential 

 and at Constant Current, more especially as regards Efficiency. By A. A. 

 Cahex and J. M. DoNALDSOJf 779 



2. On a Magaifying Telephone. By Professor Oliter Lodge, F.R.S 782 



3. *0n the Measurement of Small Differences in Resistance. By E. H. 

 Griffiths, F.R.S 782 



4. The Dynamical Theory of Refraction, Dispersion, and Anomalous Disper- 

 sion. By Lord Kelvin, G.C V.O 782 



6. Continuity in Undulatory Theory of Condensational-refractional Waves 

 in Gases, Liquids, and Solids, of Distortional Waves in Solids, of Electric 

 Waves in all Substances capable of transmitting them, and of Radiant 

 Heat, Visible Light, Ultra-Yiolet Light. By Lord Kelvin, G.C.V.O. ... 783 



6. Heat of Combination of Metals in the Formation of Alloys. By Alex- 

 ander Galt., D.Sc 787 



7. A Platinum Voltmeter. By Professor H. L. Callendar, M.A., F.R.s!!! 788 



8. *0n Radiation from a Source of Light in a Magnetic Field. Bv Professor 



T. Preston, F.R S ! 789 



9. On the Discovery by Righi of the Absorption of Light in a Magnetic Field. 

 By SiLVANTJS P. Thompson, D.Sc, F.R.S 789 



10. On the Dissipation of Energy in tlie Dielectric of a Condenser. By 



Edward B. Rosa and Aethue W. Smith 790 



11. Hydrometers of Total Immersion, By A. VV. Warrington, M.Sc 791 



