xviii CHEONOLOGY 



1860 



Dedication of the Museum. 

 Published Vol. III. of Contributions. 



1861 



Became a naturalised citizen of the 

 United States. 



Eeceived the Copley Medal of the Eoyal 

 Society. 



1862 



Published Yol. IY. of Contributions (the 

 last volume which was completed). 



1865-66 

 Expedition to Brazil. 



1868 

 Became non-resident professor at Cornell. 



1869 



Spoke at Humboldt Centennial. 

 Suffered from an acute illness of the 

 brain. 



1871-72 

 Yoyage of the Hassler. 



1873 



Summer school at Penikese. 

 December 14. Louis Agassiz died at 

 Cambridge, Massachusetts. 



