Erratum in Vol. 30. 

 Page 410, lines 30 and 31, transpose the words " common oxygen" and "ozone/ 



EOYAL INSTITUTION OF GREAT BRITAIN, 

 ALBEMARLE STREET, W. 



LECTURE ARRANGEMENTS.— Horn- before and after Easter, 3 o'clock. 

 CHRISTMAS LECTURES (adapted to a Juvenile Auditory) by 



Prof. TYNDALL, F.R.S.— Six Lectures ' On Sound/ on December 26, 28, 30, 

 1865; January 2, 4, 6, 1866. 



BEFORE EASTER, 1866. 



Prof. TYNDALL, F.R.S.— Ten Lectures ■ On Heat/ on Tuesdays and Thursdays, 



January 23 to February 22. 

 Prof. FRANKLAND, F.R.S.— Eight Lectures ' On the Non-metallic Elements, 3 



on Tuesdays and Thursdays, February 27 to March 22. 

 Prof. R. WESTMACOTT, R.A., F.R.S.— Six Lectures 'On the Way to Observe 



in Fine Arts/ on Saturdays, January 20 to February 24. 

 Rev. G. HENSLO W .— Four Lectures ' On Structural and Systematic Botany, 



considered with reference to Education and Self-instruction/ on Saturdays 



March 3 to March 24. 



The FRIDAY EVENING MEETINGS will begin on January 19. The Dis- 

 courses before Easter will probably be delivered by Prof. Tyndall, Mr. S. W. Baker, 

 The Earl Stanhope, Mr. Archibald Smith, Colonel Sir Henry James, Mr. Pen- 

 gelly, Mr. Scharf, Sir John Lubbock, Mr. Balfour Stewart, and Captain Cowper 

 Coles. 



To the Friday Evening Meetings Members and their Friends only are 

 admitted. 



AFTER EASTER. 

 Prof. FRANKLAND, F.R.S.— Four Lectures * On the Non-metallic Elements/ 



on Tuesdays and Thursdays, April 10 to April 19. 

 G. SCHARF, Esq., Secretary and Keeper of National Portrait Gallery. — Three 



Lectures ■ On National Portraits/ on Saturdays, April 14, 21, and 28. 

 Rev. C. KINGSLEY, M.A.— Two Lectures ' On Science and Superstition/ on 



Tuesday and Thursday, April 24 and 26. 

 Prof. HUXLEY, F.R.S.— Twelve Lectures ' On the Methods and Results of 



Ethnology/ on Thursdays and Saturdays, May 3 to June 9. 

 Prof. ANSTED, F.R.S.— Five Lectures 'On the Application of Physical Geo- 

 graphy and Geology to the Fine Arts/ on Tuesdays, May 8 to June 5. 



An Extra Course may possibly be given by Dr. DU BOIS REYMOND, 

 'On Electric Fish/ on Wednesday, April 11, Monday, April 16, and Wedneiday, 

 April 18. 



Among the Friday Evenings after Easter there will be probably Dis- 

 courses by Dr. Du Bois Reymond, Alexander Herschel, Esq., Rev. C. Pritchard, 

 Prof. Ansted, Prof. Roscoe, and Prof. Frankland. 



To Non-Members. — The Admission to all these Courses of Lectures is Two 

 Guineas. To a Single Course of Lectures, One Guinea or Half-a-Guinea, accord- 

 ing to the length of the Course, 



Gentlemen desirous of becoming Members are requested to apply to the 

 Secretary. 



New Members can be proposed at any Monthly Meeting. When proposed, they 

 are admitted to all the Lectures, to the Friday Evening Meetings, and to the 

 Library and Reading Rooms; and their Families are admitted to the Lectures at 

 a reduced charge. Payment : — First year, Ten Guineas ; afterwards, Five Guineas 

 a year ; or a composition of Sixty Guineas. 



Prospectuses (when prepared) may be had in the Hall. 



H. BENCE JONES, Hon. ec. 



December, 1865. 



[ADVERTISEMENTS continued on 3rd page of Cover. 



