This is the story of acculturation as practiced by the institutional educational apparatus over Portorricans, Native Americans and Afro-American ethnic groups and nationalities at the beginning of the XX Century, resulting from the Spanish-American War of 1898. Readers will find new primary sources analyzed from an anthropological point of view and related to well-known scientific personalities such as Alexander Graham Bell and Samuel P. Langley; the first representing the interests of the Bureau of Indian Affairs while the second one, the Smithsonian Institution. The first part of the book examines the rare and unusual policy of internships for young Portorricans in industrial schools originally set up for Native Americans and Afro-Americans in the USA. This book is the first of its kind published in Puerto Rico by an independent anthropologist who also addresses the ideological role of anthropological founders like Franz Boas in the State post-war effort to erase the cultural foundations of Boricua people.