. Bulletin of the Bureau of Fisheries. Fisheries; Fish culture. DEVICES FOR USE IN FISH HATCHERIES AND AQUARIA. By EUGENE VINCENT, Fish Culturist, Aquarium of the Trocadero, Paris. [Translated from the French.] ARTIFICIAL POND WITH SIPHOID OUTLET FOR REGULATION OF HEIGHT OF WATER. This pond is made of cement, the bottom having a layer meter in thickness and a Hning of meter, the sides being meter in thickness. The dimensions are 12 to 15 me- Guiter. Inlet Overflow ters by 3 meters, with any de- sired depth, and the ends are rotmded. Crosswise the bottom slopes from the middle up
. Bulletin of the Bureau of Fisheries. Fisheries; Fish culture. DEVICES FOR USE IN FISH HATCHERIES AND AQUARIA. By EUGENE VINCENT, Fish Culturist, Aquarium of the Trocadero, Paris. [Translated from the French.] ARTIFICIAL POND WITH SIPHOID OUTLET FOR REGULATION OF HEIGHT OF WATER. This pond is made of cement, the bottom having a layer meter in thickness and a Hning of meter, the sides being meter in thickness. The dimensions are 12 to 15 me- Guiter. Inlet Overflow ters by 3 meters, with any de- sired depth, and the ends are rotmded. Crosswise the bottom slopes from the middle upward at the degree of meter per meter, which equals meter for a side of i .50 meter. With this slope the pond may be cleaned by simply sweeping toward the center or by means of a few buckets of water thrown against the sides. It is fed by one or more troughs which empty into it with a stream of The pond must be level in lengthwise direction, in order to preclude danger of leaving any dry area below a given height. In the middle of the bottom of the pond, beginning at the intake end and terminating in a circular basin which occupies the opposite end, is a gutter at least meter in width and to meter in depth. The circular basin is from to meters in diameter, and to meter in depth. With the gutter it serves to hold 1027. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Bureau of Fisheries. Washington, D. C. : Govt. Print. Off.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectfisheries, bookyear19
