CHAPTER 18.. 1855-1860: Age 48-53.

1855-1860: AGE 48-53.

"Contributions to Natural History of the United States." --Remarkable Subscription.--Review of the Work.--Its Reception in Europe and America.--Letters from Humboldt and Owen concerning it. --Birthday.--Longfellow's Verses.--Laboratory at Nahant. --Invitation to the Museum of Natural History in Paris.--Founding of Museum of Comparative Zoology in Cambridge.--Summer Vacation in Europe.