Raphael Eduard Liesegang was a German chemist, photographer and entrepreneur born in Elberfeld.
He is known for his work on Liesegang rings. Wikipedia
Born: November 1, 1869, Elberfeld, Wuppertal, Germany
Died: November 13, 1947 (age 78 years), Bad Homburg, Germany
Children: Mara Liesegang
Parents: Paul Eduard Liesegang