<div class="description">
General view of an unidentified apparatus at a U.S. Department of Agriculture facility. A radioactive materials sign and protective glass panel are visible to the right of the apparatus. The U.S.D.A. commonly used radioactive material for a variety of research and testing, including the study of radioactive substances as fertilizer, as well as to model the impacts of radioactive material in soil and test the effectiveness of new insect control techniques or materials.</div>
1950s
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/9p290938x">Record in source catalog</a></li>
<li>DPLA identifier: <a rel="nofollow" class="external text" href="https://dp.la/item/f0a4d54b0db722b4b5f66bbccc18d3f7">f0a4d54b0db722b4b5f66bbccc18d3f7</a></li>
<li>Science History Institute identifier: padig:SHI-9p290938x</li></ul></span>