<div class="description">
<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.  An enlarged view of the compensating spring, with its lever, ready to be set into the instrument, the lever being ready to be attached to the end of the helical Bourdon tube.  One end of this bi-metal spring is securely soldered to the spindle running through its center, and the other end is free to move through a lever pivoted on this spindle.</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>