PURPOSE:To provide a microscope cover for a clean drum thermometer which can readily and surely cover a probe and is not bulky. CONSTITUTION:A ring-shaped base member 5 to make a probe of a drum thermometer pass therethrough is disposed at an eccentric position on one side of a film member 4 for covering the probe of the drum thermometer and is bonded to one outward point 6 of the film member 4.
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