Jacobus H. van 't Hoff. Courtesy: Jacob van 't Hoff Collection, Ms. 74, Special Collections, The Sheridan Libraries, The Johns Hopkins University

Jacobus H. van 't Hoff. Courtesy: Jacob van 't Hoff Collection, Ms. 74, Special Collections, The Sheridan Libraries, The Johns Hopkins University

Jacobus Henricus van 't Hoff (left) and Wilhelm Ostwald (right) in the laboratory.

Public domain

Jacobus H. van 't Hoff. Litograph. Courtesy: Jacob van 't Hoff Collection, Ms. 74, Special Collections, The Sheridan Libraries, The Johns Hopkins University