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Quarterly Journal of Microscopical Science, Vol s3-96, 371-373, Copyright © 1955 by Company of Biologists

A Description of a new Zooplankton Counter

JAMES WARD 1

1 Ontario Fisheries Research Laboratory, University of Toronto, Canada

The new plankton-counting cell is an annular groove machined in a circular plate of lucite. The plate is mounted on a turntable and driven at a rate of about one revolution in six minutes. Counting is done by observation of the rotating sample as it moves through the field of a microscope. This apparatus provides the convenience of the 'trough and flow systems currently used and has the advantage of being a more compact unit.






© The Company of Biologists Ltd 1955