Micron
Historical document, translated for reference. It reflects medical knowledge of the 1920s–30s and is not medical advice.
Summary
This article defines the micron as a unit of length used in microscopy and spectroscopy. It provides conversion factors between microns, millimicrons, millimeters, and centimeters.
Encyclopedia entry (1928–1936)
MICRON (abbreviated designation µ), a unit of length used in microscopy and spectroscopy; 1 µ = 0.001 mm. In spectroscopy, a smaller unit is more often used—the millimicron (mµ); 1 mµ = 0.001 µ. Thus, 1 mm = 1,000 µ; 1 µ = 1,000 mµ. Or 1 µ = 10-3 mm = 10-4 cm; 1 mµ = 10-6 mm = 10-7 cm.
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“Micron.” Soviet Medical Encyclopedia. English translation of Bolshaya Meditsinskaya Entsiklopediya, 1st ed. (Moscow, 1928–1936), ed. N. A. Semashko. https://sovietmedicalencyclopedia.pages.dev/article/micron/