<div class="description">
Franklin Institute Library bookplate featuring a small inset portrait of Matthew Carey Lea (1823-1897). Lea, a Philadelphian lawyer and scientist, was devoted to the chemistry of photography. He is known as the father of mechanochemistry due to his observations of silver halide decomposition by trituration. After his death, Lea's notebooks were destroyed as per his request, and his books and apparatus were bequeathed to the Franklin Institute.</div>
1910<div style="display: none;">date QS:P571,+1910-00-00T00:00:00Z/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/awm78yy">Record in source catalog</a></li>
<li>DPLA identifier: <a rel="nofollow" class="external text" href="https://dp.la/item/af789139600f96eb258dca91efcf2d9b">af789139600f96eb258dca91efcf2d9b</a></li>
<li>Science History Institute identifier: padig:SHI-awm78yy</li></ul></span>