<div class="description">
<p>Photograph of Beckman Model DB Spectrophotometer
</p><p>The Beckman DB was a double beam model, made by Beckman Instruments, which allowed for comparison between two light paths: a reference and the sample being measured.
</p>
Published without a copyright notice in Beckman Instruments <i>Feedback</i> newsletter, April 1960 (box 44, folder 34)</div>
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Unknown<span style="display: none;">Unknown </span></div>
1960<div style="display: none;">date QS:P571,+1960-00-00T00:00:00Z/9</div>
<a rel="nofollow" class="external free" href="https://digital.sciencehistory.org/works/8g84mm32q">https://digital.sciencehistory.org/works/8g84mm32q</a>