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<ul><li><b>Scope and content:</b>  Original Caption: Manufacturing Boyce Moto-Meters Distance Type, for the government at the Boyce Moto-Meter Plant, Long Island, N.Y.  The Bourdon tube is rolled from a section such as shown at the left to that shown at the right.  It will be noticed that the volume is decreased to a very small cubical content by this rolling process, and the tubing is rendered much more flexible by this change in cross section.  The lower left hand corner shows the helical tube after it is rolled and coiled.</li></ul>
Photographer: Boyce Moto-Meter Plant</div>
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Unknown author<span style="display: none;">Unknown author</span> or not provided</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>