TRANSACTIONS OF THK SECTIONS. Xlii 



Page 



4. *The Use of Diagrams in the Classification of Climates. By Dr. John 



Ball and J. I. Craig 348 



5. Note on an Unusual Type of Meteor observed at Portsmouth, August 31, 



1911. By F. J. M. Stratton 348 



6. Report of the Committee on Electrical Standards (p. 80) 348 



Section B.— CHEMISTRY. 



THURSDAY, AUGUST 31. 

 Address by Professor J. Walker, D.Sc, F.R.S., President of the Section .... 349 



1 . The Diffusion of Gases through Water. By Professor Carl Barus 357 



2. The Present Position of Electric Steel Melting. By Professor Andrew 



McWilliam, A.R.S.M., M.Met, (p. 261) 357 



3. The Compressibility of Mercury. By Dr. Wm. C. Mc,C. Lewis 357 



4. *The Chemistry of the Glutaconic Acids. By Dr. J. F. Thorpe, F.R.S. 358 



5. *The Influence of Constitution on the Molecular Volumes of Organic 



Compounds at the Boiling Point. By G. Le Bas 358 



6. *The Influence of Substituents on Reaction Velocities. By Professor R. 



Wegscheider 358 



7. Report on the Influence of Carbon and other Elements on the Corrosion 



of Steel (p. 83) 358 



FRIDAY, SEPTEMBER 1. 



1. Discussion on Indicators and Colour 358 



(i) The Application of Methyl Orange for the Determination of the 

 Affinity Constants of Weak Acids and Bases, with a Discussion of 

 the Errors. By Dr. V. H. Veley, F.R.S 358 



(ii) The Sensitiveness of Indicators. By H. T. Tizard (p. 268) .... 358 



2. Report on Dynamic Isomerism (p. 91) 358 



3. The Ultra-Violet Absorption Spectra of the Vapours of various Organic 



Substances compared with the Absorption of these Substances in 

 Solution and in Thin Films. By J. E. Purvis 359 



4. Absorption Spectra and Refractive Power of Metallic Vapours. By 



Professor P. V. Bevan, M.A., Sc.D 360 



5. Optically Active Substances which contain no Asymmetric Atom in 



the Molecule. By Professor William Henry Perkin, F.R.S., and 

 Professor William Jackson Pope, F.R.S 361 



