When1: 1821
When2: 1839
Who: Jan Evangelista Purkinje [Purkinje, Jan Evangelista]
What: anatomist
Where: Spain/Germany
works\ Observations and Experiments Investigating the Physiology of Senses [1821]; New Subjective Reports about Vision [1825]
Detail: He lived 1787 to 1869 and studied brain neurons. He said fingerprints are unique [1823]. As light intensity decreases, red objects fade faster than blue objects {Purkinje effect} [1825]. He discovered germinal vesicles [1825], skin sweat glands [1833], Purkinje cells [1837], and Purkinje fibers [1839]. He digested protein with pancreatic extract [1836].
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Date Modified: 2022.0224