had ascertained the quantity of fish in it. His center of the pond. Toward the outlet sluice it may be from deepening, the so-called outlet collector, O C. The pur- prognostications were afterwards fully verified by direct 6 to 8 feet, but only for an area of from 300 to 1,000 square pose of this… … mate mutual dependence of animal and vege- all the fish into the collector when the pond is 'i^t^ "'"^'?i#p^ > table life upon each other has long been known, W ••z =■-■" being drained. The collector is nothing but a and now both are upheld by the aid of lime. place from 30 to 40 feet in length and…
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