1921] General Monthly Meeting 295 



Faculte des Sciences de l'Universite 

 de Paris, 

 sorbonne, 



December 16, 1920. 

 Sir, 



I have the honour to acknowledge receipt of the Official Diploma of 

 Honorary Membership of the Royal Institution, of which I was informed by a 

 letter from Mr. Henry Young. 



I shall be greatly obliged if you will kindly convey my thanks to the 

 President, to the Board of Managers, and to the Members generally of your 

 illustrious Society. I recognize the prize, the mark of high esteem^ and the 

 great honour which they have accorded me, and I am extremely sensible of it. 



Accept, Sir, my best sentiments, 



(Signed) Jean Perrin. 



The Chairman announced that the Managers had this day awarded 

 the Actonian Prize of One Hundred Guineas to George Ellery Hale, 

 D.Sc. F.R.S. Hon.M.R.L, Director of the Mount Wilson Solar Observa- 

 tory, for his contributions to Solar Physics. 



The Presents received since the last Meeting were laid on the 

 table, and the thanks of the Members returned for the same, viz. : — 



The Secretary of State for India — Agricultural Research Institute, Pusa : 

 Memoirs : Botanical Series, Vol. X. No. 6 ; Vol. XI. No. 1 ; Bacteriological 

 Series, Vol. I. No. 9. 8vo. 1920. 

 Kodaikanal Observatory : Bulletin, No. 65. 4to. 1820. 

 Memoirs of the Geological Survey, Vol. XLVI. Part 1. 8vo. 1920. 

 Survey of India : Professional Paper, No. 15, Pendulum Operations, 1908-13. 

 8vo. 1915. 

 Admiralty, Lords Commissioners — Nautical Almanac, 1923. 8vo. 1920. 

 Greenwich Observations, 1915. 4to. 1920. 

 Heliographic Results, 1915. 4to. 1920 

 Aberdeen Chamber of Commerce — Journal, Jan. 1921. 8vo. 

 Accademia dei Bincei, Eeale, Boma— Atti, Serie Quinta : Rendiconti, Classe 

 di Scienze Fisische, Mathematiche e Naturali, Vol. XXIX. 2° Sem. 

 Fasc. 3-12. Classe di Scienze Morali, Vol. XXIX. Fasc. 7-10. 8vo. 

 1920. 

 Aeronautical Engineers, Institution of — Journal, Vol. I. No. 3. 4to. 1920. 

 Aeronautical Society, Royal — Journal, Dec. -Jan. 1920-21. 8vo. 

 Allegheny Observatory - Publications, Vol. V. Nos. 4-5. 4to. 1920. 

 American Acadimv of Arts and Sciences — Proceedings, Vol. LV. Nos. 8-9. 



8vo. 1920. 

 American Geographical Society — Geographical Review, Dec. 1920. 8vo. 

 American Philosophical Society — Transactions, N.S., Vol. XXII. Part 4. 4to. 

 1920. 

 Proceedings, Vol. LIX. Nos. 3-4. 8vo. 1920. 

 Antiquaries, Society of— The Antiquaries' Journal, Vol. I. No. 1. 8vo. 1921. 

 Asiatic Society, Royal — Journal, Jan. 1921. 8vo. 

 Asiatic Society, Royal (Bombay Branch)— Journal, Vol. XXV. No. 2. 8vo. 



1920. 

 Astroyiomical Society, Royal — Monthly Notices, Vol. LXXXI. No. 1, 1920. 



8vo. 

 Australia, Commonivealth of— Science and Industry, Oct. 1920. 8vo. 



