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, Isi, Archcoolog}' ; 

 2d, Physiology; 3d, The Lettered Races; 4tli, 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, of New York, on 

 "Artificial Light." 



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

 on " Gunpowder." 



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



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

 Revelations." 

 The courses of lectures by Professors Wilson, Guyot, and Wurtz 



will be published in the appendix to the report for 18G2, and subse- 

 quent years. 



Respectfullv submitted. 



JOSEPH HENRY, 



Secretary Smithsonian Institution. 

 February, 1863. 



