(57) A dispenser for automatically metering a liquid-soluble or liquid-suspendible material
into a liquid environment in response to a rise and fall in the level of the liquid
which comprises a buoyant container adapted for holding the material to be dispensed,
said container being adapted for pivotal mounting on an axis which is offset from
the axis of the center of buoyancy of said container by an amount from greater than
0% up to about 200% of the distance, a measured along a line through the pivot axis,
between said center of buoyancy axis and the outer perimeter of said container, said
container having one or more openings in a wall thereof located below the center of
buoyancy of said container.
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