SECTIONAL TRANSACTIONS.— A. 339 



(d) Mr. E. C. TiTCHMARSH. — Fourier Transforms. 

 {e) Prof. J. C. BuRKiLL. — The Stieltjes Integral in Harmonic Analysts. 



Friday, August 6. 



9. Joint Discussion with Section B on The Mechanism of Homo- 

 geneous Chemical Reactions. (See p. 343.) 



10. Report of the Seismology Committee. (See p. 267.) 



Prof. H. H. Turner, F.R.S. ; Dr. H. Jeffreys, F.R.S. 



1 1 . Dr. J. Hartmann. — Demonstration of a new Air Jet AcouMic 



Generator. 



12. Prof. J. S. TowNSENP, F.R.S. — The Transference of Energy in Collisions 



between Electrons and Molecules. 



Department of Mathematics. 



13. Dr. T. M. Cherry. — Orbital Dynamics. 



The removal of secular terms from the solution of Hamiltonian equations. 



14. Dr. H. Knox-Shaw. — Hornsby's Meridian Observations at the Radcliffe 



Observatory. 



15. Prof. E. A. Milne, F.R.S. — Maxwell's Law and Radiation. 

 Consider the atoms moving with a given volocity w in a gaseous assembly. It is 



shown that if their centre of mass undergoes a deceleration proportional to v, and if 

 superposed on this each atom undergoes random increments of velocity, then the 

 velocity distribution in the steady state is Maxwellian. This shows that the absorp- 

 tion and emission of quanta, according to Einstein's theory, leads to Maxwell's law. 

 The theory is applicable to systems not in thermodynamic equilibrium, such as stellar 

 atmospheres. 



16a. Dr. A. A. Robb, F.R.S. — A Simple Form of Integraph. 



16b. Sir George Greenhill, F.R.S. — Division Values of the Theta and 



Zeta Functions. 

 Graphical illustrations of the algebraic theory. 



Afternoon visit to Radcliffe Observatory. 



Monday, August 9. 



17. Presidential Address by Prof. A. Fowler, F.R.S., on The Analysis 



of Line Spectra ; followed by contributions on Spectra from Prof. 

 N. Bohr, Prof. P. Ehrenfest, Prof. 0. Rxjnge. (For Address, 

 see p. 16.) 



18. Prof. C. Dayton-Miller. — Recent ivork on the Michelson-Morley 



experiment. 



z2 



