SECTIONAL TRANSACTIONS. — A. 351 



SECTIONAL TRANSACTIONS. 



SECTION A. -MATHEMATICAL & PHYSICAL 



SCIENCE. 



(For references to the publication elsewhere of communications entered in 

 the following list of transactions, see p. 380.) 



Tuesday, August 24. 



1, Presidential Address by Prof. A. S. Eddington, F.E.S. 

 See p. 34. 



2. Mr. J. EvERSHED, F.E.S. — Measures of the Shifts of the 



Fraunhofer Lines and their Interpretation, particularly 

 with relation to the Einstein Theory. 



3. Major P. A. MacMahon, F.E.S.— A New Binomial 



Theorem and its Arithmetic Interpretatio-n. 



4. Prof. H. Hilton. — Plane Algebraic Curves of Degree n 



tvith a Multiple Point of Order n-1, and a Conic of 

 2n-point Contact. 



5. Prof. G. H. Bryan, F.E.S. — The Graphical Solution of 



Spherical Triangles. 



6. Mr. T. C. Lewis. — Is there in Space of three Dimensions 



an Analogue' to Feuerbach's Theorem? Is there any- 

 thing corresponding to the Hart System? 



Wednesday, August 25. 



7. Dr. F. W. Aston. — Mass Spectra and the Constitution of 



Chemical Elements. 



8. Sir E. EuTHERFORD, F.E.S. — The Building up of Atoms. 



9. Prof. E. Whiddington.- — The Ultra-Micrometer. 



lO, Lieut.-Ool. F. J. M. Stratton. — Spectra of Nova 



Aqidla III. 

 1 1. Eev. Father A. L. Cortie, S.J. — Comparison of Drawings 

 of Solar Fac'ula and Photographs of Calcium Flodculi. 



Thursday, August 26. 



12. Discussion on The Origin of Spectra, opened by Prof. A. 



Fowler, F.E.S. , and Prof. J. W. Nicholson, F.E.S. 



13. Eeport of Seismology Committee. Prof. H. H. Turner, 



F.E.S., and Mr. J. J. Shaw. See p. 215. 



