William O. (William Otis) Crosby

Born in 1850, William Otis Crosby was an American geologist, educator, and writer whose career was closely tied to Boston. He studied at the Massachusetts Institute of Technology and later taught geology there, becoming known for both his scientific work and his teaching.

Crosby specialized in physical geology and the geology of New England, writing on subjects such as minerals, rocks, and regional landforms. He also produced books for general readers, including Common Minerals and Rocks, showing a talent for making geology approachable without losing its scientific grounding.

He died in 1925, but his reputation lasted well beyond his lifetime. Remembered as one of Boston's notable geologists, he stands out as a figure who helped connect academic geology with a wider reading public.