Alexander von Humboldt 
Personal Narrative of Travels to the Equinoctial Regions of America, During the Years 1799-1804 [PDF ebook] 

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. Indian Archipelago, vol. I, p. 387 and This produce is triple that of corn, and double that of potatoes in France. But the plantain pro duces, on the same surface of land, still more alimentary substance than the sago-tree.