Final answer:
Melvil Dewey took the position of Librarian at Columbia College in 1883. He is renowned for developing the Dewey Decimal Classification system and had a significant impact on library science and education, promoting reforms for an informed society.
Step-by-step explanation:
In 1883, Melvil Dewey took the job of Librarian at Columbia College. This direct answer addresses the question posed by the student regarding the position that Dewey held during that time. Melvil Dewey was an influential figure in the field of library and information science, best known for creating the Dewey Decimal Classification system, a proprietary library classification system first published in the United States in 1876. His contributions to library science and education went beyond the classification system; they also included efforts to improve library systems of that era, making him an ideal candidate for a librarian position at an academic institution.
Dewey's work as a librarian reflects his lifelong dedication to the organization of knowledge and education. While this position is notably separate from his other contemporaries mentioned in the provided information, such as Booker T. Washington and Woodrow Wilson, who had roles such as institutional leaders and politicians, Melvil Dewey is well remembered for his innovative approach to library management and for adopting educational reforms that aimed at creating an informed American society ready for progressive change.