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Graduate student majoring in biology Addison Plummer searches for long-jawed orb weaver spiders in the Flat River near Burch Field in Lowell on June 26. (Photo releases on file)

Vessel Scientific Equipment

Visiting students measure water quality in the D.J. Angus's research laboratory.
An AWRI instructor demonstrates the use of a plankton tow net.
An AWRI deckhand and visiting student collect water using a Van Dorn sampler onboard the D.J. Angus research vessel.
Jamie Cross displays a Florel-Ule scale, a series of colored water in vials that provides a measurement of water clarity not requiring expensive machines..
Page last modified June 8, 2026