<div class="description">
Black and white photograph of Jacobus Henricus van’t Hoff (1852-1911) and Wilhelm Ostwald (1853-1932) in a laboratory. Ostwald and van't Hoff are considered to be among the founding fathers of the field of physical chemistry. Van't Hoff, a Dutch chemist, received in 1901 the first Nobel prize in Chemistry “in recognition of the extraordinary services he has rendered by the discovery of the laws of chemical dynamics and osmotic pressure in solutions.” Ostwald was a German chemist and philosopher who, in 1909, received the Nobel Prize in Chemistry for his work on catalysis and investigations of the fundamental principles governing chemical equilibria and rates of reaction. When he retired in 1906, Ostwald studied art, philosophy, and politics.</div>
1905<div style="display: none;">date QS:P571,+1905-00-00T00:00:00Z/9</div>
This file was contributed to Wikimedia Commons by <a href="https://en.wikipedia.org/wiki/en:Science_History_Institute" class="extiw" title="w:en:Science History Institute"><span title="library, museum, and archive in Philadelphia, United States">Science History Institute</span></a> as part of a cooperation project. The donation was facilitated by the <a href="https://en.wikipedia.org/wiki/Digital_Public_Library_of_America" class="extiw" title="w:Digital Public Library of America">Digital Public Library of America</a>, via its partner PA Digital.<span style="text-align:left">
<ul><li><a rel="nofollow" class="external text" href="https://digital.sciencehistory.org/works/ehg7cm6">Record in source catalog</a></li>
<li>DPLA identifier: <a rel="nofollow" class="external text" href="https://dp.la/item/2760495d682a930a5b9af36186af19eb">2760495d682a930a5b9af36186af19eb</a></li>
<li>Science History Institute identifier: padig:SHI-ehg7cm6</li></ul></span>