<div class="description">
Blue cardboard box containing three compartments; two compartments hold a number of black and white stone marbles; third compartment holds four brass rods, numerous glass spacers, and sheets of thin paper; box also includes eleven plastic squares with holes and a set of instructions. Models kits, such as this one, are often found in laboratories and classrooms and are used to visualize the structure of chemical substances.</div>
Undated
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/d791sg22v">Record in source catalog</a></li>
<li>DPLA identifier: <a rel="nofollow" class="external text" href="https://dp.la/item/69010c3b5fa8677046fc3fecb4868c5b">69010c3b5fa8677046fc3fecb4868c5b</a></li>
<li>Science History Institute identifier: padig:SHI-d791sg22v</li></ul></span>