. Beck microscopes. Microscopes. Petrological attachment with a synchronized rotating motion to analyser and polarizer by links and independent rotating and swing-out Attachments to Radial Research Microscope. 3G. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Beck (R. & J. ) Ltd. London : Beck

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