<div class="description">
<ul><li><b>Scope and content:</b>  Original caption: View of the heating plant which furnishes heat and steam to operate the extractory kilns. L. Kirkpatrick is shown at the right adjusting the control valves for pipes leading from the furnace to the kilns.</li></ul></div>
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Unknown author<span style="display: none;">Unknown author</span> or not provided</div>
February 1940<div style="display: none;">date QS:P571,+1940-02-00T00:00:00Z/10</div>
<a href="https://en.wikipedia.org/wiki/U.S._National_Archives_and_Records_Administration" class="extiw" title="en:U.S. National Archives and Records Administration">U.S. National Archives and Records Administration</a>