. Domesticated trout [microform] : how to breed and grow them. Fish culture; Trout; Pisciculture; Truite. APPENDIX IV. 287 gus. It is also one of the most durable and easily handled things in the world. And this is not all. It has invari- ably been my experience that in any instance where the carbonized hatching troughs have been used, not only have the eggs been free from fungus, and have therefore hatched better, but the young fry have lived better; and the con- trast between the effect of the charred wood and the raw material in this respect has been very marked indeed. While the young fish
. Domesticated trout [microform] : how to breed and grow them. Fish culture; Trout; Pisciculture; Truite. APPENDIX IV. 287 gus. It is also one of the most durable and easily handled things in the world. And this is not all. It has invari- ably been my experience that in any instance where the carbonized hatching troughs have been used, not only have the eggs been free from fungus, and have therefore hatched better, but the young fry have lived better; and the con- trast between the effect of the charred wood and the raw material in this respect has been very marked indeed. While the young fish, hatched in the old wooden troughs, seemed to drop down dead from no assignable cause, the fry hatched in the charred troughs showed a wonderful tenacity of life, that became more and more surprising £\^ery day. I have hatched over a million eggs in these troughs, and speak from experience, and my experience has been, without an exception, to confirm the belief that the fry hatched in this material do not die as they did under the old method. It is a fact that can be confirmed by my assistants, that in some of the charcoal troughs last year less than one-tenth per cent were lost by death in the first three months, with the exception of deformed ones. This year it has been the same ; and if any one will take the pains to visit my hatching house, I will show him charred troughs, which the water has run through for six months or more, that are as clean from fungus as when the water was turned on in the fall, and also troughs of young fry, where death is a rare occurrence. The exclusive right to use charcoal and charred wood for hatching fish eggs has been secured to the writer in the United States by letters patent; but even with the royalty paid for the right to use charred wood it is still the cheapest thing that can be founds as well as the best. The reader can see the saving in expense in the use of charcoal troughs over glass grilles by looking at the fol- lowing figures:
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Keywords: ., bookcentury1800, bookdecade1870, bookpublisherbosto, bookyear1872
