TIL that Arthur Hill Hassall (1817– 1894) was a British physician, and a pioneer in the use of the microscope as a tool in medicine and public health. In 1846 he published a two-volume study, ‘The Microscopic Anatomy of the Human Body in Health and Disease’, the first English textbook on the subject

https://www.sciencemuseum.org.uk/objects-and-stories/medicine/microscope
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