<p>Metallographic system based on Martens design, ca. 1904<br></p>
Images donated as part of a GLAM collaboration with Carl Zeiss Microscopy - please contact <a href="//commons.wikimedia.org/wiki/User:Pigsonthewing" title="User:Pigsonthewing">Andy Mabbett</a> for details.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/75834543@N06">ZEISS Microscopy</a> from Germany
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<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/zeissmicro/6892932760/">Metallographic system based on Martens design, ca. 1904</a>