The author, in this paper, gives an account of the continuance and confirmation of his experimental observations on the growth of salmon fry, as formerly communicated to the Society. He considers the objections made to his artificial ponds, in so far as they were supposed to afford an insufficient supply of food, to be without reasonable foundation, as these ponds actually abound with the ordinary insect food of fishes, and the young broods themselves correspond in every way to those of the same age in the natural streams and pools of the river. He had previously ascertained and stated, that young salmon remain in their native river for two years (under the names of parrs, pinks, fingerlings, &c), and during that period, or till near its close, he applies to them the name of parr, as that by which they arc usually designated in Scotland.