Featured Microscopist: Spike (M.I.) Walker

Mixed Diatoms

Mixed diatoms

Photomicrograph of mixed diatoms, from an arranged group by Schrader. A Zeiss 10x/0.22 NA polarizing interference objective was used to produce this Jamin-Lebedeff image. Differences in optical wave path are translated into color differences. Illumination was provided by a 12-volt 100-watt lamp utilizing a Zeiss Ultraphot IIIB microscope with 35 millimeter automatic photohead. Photographed with Fujichrome Velvia. (63x)

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