1910] on Maf/iid'k Sfornis. 787 



in the evenmg. Many of these disturbances occurred when the sun 

 had been contmuously below the Antarctic horizon for weeks. 

 Movements simultaneous with them could be traced through the 

 Ohristchurch (N.Z.), Mauritius and Bombay curves, even as far as 

 Kew. but the amplitude in these cases diminished notably as the 

 distance from the Antarctic increased. In the Antarctic, as the 

 evening [idvanced, disturbances of a rapidly oscillating type became 

 more prominent. These attained their maximum development some 

 hours after midnight, about the time when Mr. Bernacchi observed 

 the maximum frequency of aurora. 



[C. C] 



GENERAL MONTHLY MEETINCx, 



Monday, Mai'ch 7, 11)10. 



Sir James Crichton-Browne, M.T). LL.D. F.R.S.. Treasurer and 

 Vice-President, in the Chair. 



Edward Bryant, Esq. 



Mrs. A. P. Cazenove, 



Bernard Dyer. Esq., D.Sc. F.I.O. 



Miss Edith Prankerd, 



Sidney Skinner, Esq. 



Rev. William Robert Trench, 



Ralph Vincent, Esq., M.D. B.S. M.R.C.P. 



James M. Williams, Esq., F.L.S. F.R.G.S. F.R.A.S. 



Arthur Mason Worthington, Esq., C.B. M.A. F.R.S. F.R.A.S 



were elected ^Members of the Royal Institution. 



The Special Thanks of the Members were I'eturned to Ernest de 

 la Rue, Esq., for his present of a Portrait of his father, the late 

 Warren de la Rue. Esq. 



The following Lecture Arrangements were announced : — 



Arthur Harden, Esq., D.Sc. Ph.D. F.R.S., Head of Biocliemical Depart- 

 ment, Lister Institute. Three Lectures on The Modern Development of 

 THE Problem of Alcoholic Fermentation. On Tuesdays, April 5, 12, 19. 



Professor Frederick W. Mott, M.D. F.R.S. F.R.C.P., Fullerian Professor 

 of Physiology, Royal Institution, etc. Three Lectures on The Mechanism of 

 THE Human Voice. On Tuesdays, April 26, May 3, 10. 



Professor A. E. H. Love, M.A. D.Sc. F.R.S., Sedleian Professor of Natural 

 Philosophy, University of Oxford. Two Lectures on Earth Tides. On Tues- 

 days, May 17, 24. 



Charles J. Holmes, Esq., M.A., Director of the National Portrait GaUery. 

 Two Lectures on Heredity in Tudor and Stuart Portraits. On Tuesdays, 

 May 31, June 7. 



