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hand lens |
Also found in: Encyclopedia, Wikipedia, Hutchinson | 0.03 sec. |
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n Pustules and spores are difficult to see in the field without a high-powered hand lens (20X to 30X); a laboratory test is needed for confirmation. Use a hand lens that is at least 20x, he noted, and hold it to your eye, using your thumb against your cheek to keep it the proper distance. One set of data comes from images taken with the rover's equivalent of a hand lens. |
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