Publisher's Synopsis
Excerpt from Use of Mobile Bioassay Equipment in the Chemical Control of Sea Lamprey
A centrifugal -type, water -circulating pump with 2-inch suction and 1 - inch discharge and powered by a -horsepower electric motor was mounted in the laboratory to pump water directly from the sueam to the trailer through a rubber hose. An intake basket covered with fine-mesh screening filtered debris from the incoming water. This basket contained a check valve to prevent loss of water from the hose when the pump was not running.
Water was piped to the troughs by -inch cop per tubing. A shutoff valve was provided for each trough. Standpipes, 2 inches in diameter and 7 inch es high, at the end opposite the water source con trolled water depth. The standpipes were connected to a drain beneath and at the rear of the trailer. A hose attached to this drain returned overflow water to the stream. Valves were installed at low points in the water system to permit complete drainage when the laboratory was not in use.
The troughs contained space for 22 individual test containers each, or a total of 44 in the two. Each container was provided with a controllable supply of compressed air to maintain oxygen concentrations in the test solutions at or near saturation.
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