. Domesticated trout. Fish culture; Trout. [from old catalog]. HATCHING APPARATUS. 69. tier of trays above another in the hatching troughs. If there is abundance of water, three or four tiers can be safely used. More than this with the ordinary hatching troughs would be inconvenient, as the lower tier would necessarily be so deep in the water. The advantage of this system is that it economizes room, it being obvious that with four sets of trays running the whole length of the trough, one above another, four times as many eggs can be hatched in a trough as could be hatched in one set of trays.
. Domesticated trout. Fish culture; Trout. [from old catalog]. HATCHING APPARATUS. 69. tier of trays above another in the hatching troughs. If there is abundance of water, three or four tiers can be safely used. More than this with the ordinary hatching troughs would be inconvenient, as the lower tier would necessarily be so deep in the water. The advantage of this system is that it economizes room, it being obvious that with four sets of trays running the whole length of the trough, one above another, four times as many eggs can be hatched in a trough as could be hatched in one set of trays. This plan has been in use, I think, at the United States Salmon-breeding Es- tablishment in Maine, under the charge of Mr. Charles G. Atkins. It is not pat- ented. 3. WilliatnsorCs Method. — This is really a modification of the hatching trough, but as it is intended only to be used with trays, and as it makes an entire change in the tray system, I include it here with the other methods of employing trays. Ac- cording to this plan, the water is forced up through these trays from the bot- tom. This is accomplished, as will be seen in the accompanying diagram, by placing at the lower end of each compartment in the troughs a cleat extending entirely across the trough, and reaching from the bottom almost to the top, and by placing at the upper end a similar cleat reaching \ trr- m. 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 Stone, Livingston, 1836-1912. [from old catalog]. Charlestown, N. H. , For sale at the Cold spring trout ponds
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Keywords: ., bookauthorstoneliv, bookcentury1800, bookdecade1890, bookyear1896
