<div class="description">
<p>Photograph of Beckman Zeromatic II pH meter, with two women working at benches in the background
</p>
Published without a copyright notice in Beckman Instruments <i>Feedback</i> newsletter, v9 n3, August 1966 (box 44, folder 40)</div>
<div class="fn value">
Unknown<span style="display: none;">Unknown </span></div>
1966<div style="display: none;">date QS:P571,+1966-00-00T00:00:00Z/9</div>
<a rel="nofollow" class="external free" href="https://digital.sciencehistory.org/works/tb09j5775">https://digital.sciencehistory.org/works/tb09j5775</a>