USGS

HOW TO COLLECT OIL-LIKE FILMS

Equipment

Microscope slide, magic marker or diamond scribe, something to put slide in (slide box, centrifuge tube, or slide mailer)

boy collecting film
The oily-looking film can be lifted off with a microscope slide as is shown here. Sample was taken in an Anacostia River tributary at Ft. Dupont Park, D.C.



Procedure

1. Write place code, number, and date on back of slide.
2. Slip microscope slide under the film and lift film out.
3. Let water run off one edge of slide.
4. Put dry or partly dry slide into the slide box.



Collecting Hint


drawing







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Contact: Norrie Robbins

U.S. Department of the Interior, U.S. Geological Survey
URL: http://pubs.usgs.gov/gip/microbes/oil-like.html
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Last modified: 16:37:19 Fri 17 Feb 2006
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