REPORT OF THE SECRETARY. 45 



instruction rather than mere amusement; although the attendance 

 was not as large as in the case of the single lectures or the more ex- 

 citing topics of the day, yet it was well maintained and comprised an 

 attentive and decorous audience. 



The following are the courses which were delivered, namely: 



A course of six lectures, by Professor Daniel Wilson, of the University 

 of Toronto, on "Unwritten History," embracing, 1st, Archaeology ; 

 2d, Physiology; 3d, The Lettered Races; 4th, The Maritime Races; 

 5th, The Origin of Civilization, and Gth, The Historic and Unhis- 

 toric Races. 



A course of six lectures, by Professor Arnold Guyot, of Princeton Col- 

 lege, on "The Unity of Plan in the System of Life, as exhibited in the 

 characteristic ideas and mutual relations of the great groups of the 

 vegetable and animal kingdom." 



A course of five lectures, by Professor E. N. Horsford, of the Law- 

 rence Scientific School, Cambridge, on "Munitions of War." 



A course of six lectures, by Professor John Torrey, uf New York, on 

 "Artificial Light." 



A course of four lectures, by Professor nenry Wurtz, of New York, 

 on " Gunpowder." 



Two lectures, by Dr. Solger, on "Ethnology." 



One lecture by Arthur W. Edwards, on "The Microscope and its 

 Revelations." 

 The courses of lectures by Professors Wilson, Guyot, #nd Wurtz 



will be published in the appendix to the report for 1862, and subse- 

 quent years. 



Respectfully submitted. 



JOSEPH HENRY, 



Secretary Smithsonian Institution. 

 February, 1863. 



