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A Victorian doctor and microscopist, he helped turn the microscope into a practical tool for studying plants, blood, and other natural specimens. His books opened up a hidden world for both scientists and curious general readers.

by J. W. (John William) Griffith
Born in 1819, John William Griffith was a British medical doctor, botanist, and skilled microscopist. He became known for using the microscope not just in medical practice but also in the close study of plants and other natural objects, at a time when microscopy was rapidly changing how people understood the living world.
He wrote a number of works on microscopic observation and technique, and is especially remembered for The Micrographic Dictionary, first published in 1856 and prepared with Arthur Henfrey. He also wrote practical guides on examining blood and bodily secretions, helping make detailed scientific observation more accessible to working students and researchers.
Griffith died in 1901. His work belongs to that energetic 19th-century moment when science was becoming more hands-on, and his books still stand as clear examples of how much discovery could begin with careful looking.