<div class="description">
Early examples of paper chromatography from German chemist Friedlieb Ferdinand Runge, who is considered to be the originator of the analytic technique. Runge investigated the color reactions of various chemical substances such as ammonia and iron or copper oxide. The results include these 22 smaller chromatograms mounted on the title page surrounding the title, and 60 larger chromatograms mounted on 31 leaves. The chromatograms consist of concentric circles of color produced by applying a liquid chemical compound to filter paper.</div>
1858<div style="display: none;">date QS:P571,+1858-00-00T00:00:00Z/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/9c67wn74v">Record in source catalog</a></li>
<li>DPLA identifier: <a rel="nofollow" class="external text" href="https://dp.la/item/e58aa65919b905637994edcb0bef702e">e58aa65919b905637994edcb0bef702e</a></li>
<li>Science History Institute identifier: padig:SHI-9c67wn74v</li></ul></span>