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A USGS microbiologist pours a groundwater sample into a sterile filter

Detailed Description

Michigan Bacteriological Research Laboratory — Lansing, Michigan. A USGS microbiologist pours a groundwater sample into a sterile filter cup. This water sample will be pulled through a 0.2 micron filter, and will ultimately be used to characterize what bacteria are present within the groundwater sample.

Sources/Usage

Public Domain.

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