Tullgren funnel

Tullgren funnel
Apparatus designed by adj. H. Tullgren for extraction of animals from duff and litter; the sample is placed on a sieve and heat is applied from above to drive the animals downward into a funnel with a collecting vessel below; similar to a Baerman funnel that uses a water interface between sample and collecting vessel.

Online Dictionary of Invertebrate Zoology. . 2005.

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