at his prey, and as quickly return. The station which he occupies in this manner is invariably well chosen. Should a favourite haunt where food is concentrated by the current be rather crowded by his fellows, he will prefer contending with them for a share in it, to residing long in an unproductive locality. A Trout will chiefly frequent one place during all the summer months. It is well known that he quits the larger waters, and ascends the smaller brooks for the purpose of spawning in October and November, when the male assists the female in making a hole in the gravel wherein to deposit the ova. By some it is supposed, that they both lie dormant in the mud during the greatest severity of the winter. Sense of Hearing. In order that we might be enabled to ascertain the truth of a common assertion, (viz.) that fish can hear voices in conversation on the banks of a stream, my friend, the Rev. Mr. Brown, of Gratwich, and myself, selected for close observation a Trout poised about six inches deep in the water, whilst a third gentleman, who was situated behind the fishing-house, (i. e.) diametrically opposite to the side where the fish was, fired off one barrel of his gun. The possibility of the flash being seen by the fish was thus the man, round, or over the corner of the bank, by the aid of the water above C, if both were situated as respectively represented in the diagram; but if the surface of the water should be at I K, (i. e.) about as low as the fish's eye, then he could not see any part of the figure AB, because a straight or unrefracted pencil of light, A C B, would be obstructed by the bank. Increased obliquity in pencils of light falling from an object upon a surface of water, is accompanied by still more rapidly increasing refraction but the distinctness with which the object is seen decreases in an inverse proportion. The bending or refraction which a pencil of light, as NEOFM (fig. 2.), falling very obliquely upon the surface of the water, undergoes before arriving at the eye of a fish, at O, is sufficient to produce very great indistinctness and distortion of the image of M P formed in his eye. Perhaps indistinctness of vision may, on other accounts, also take place in the eye of a fish looking through air. The crystalline and various other humours may not be capable of such comprehensive adjustment as would enable him to see so distinctly through air as he can through water. But long before a pencil of light, as N E L, becomes horizontal, it will not enter the water at the man, round, or over the corner of the bank, by the aid of the water above C, if both were situated as respectively represented in the diagram; but if the surface of the water should be at I K, (i. e.) about as low as the fish's eye, then he could not see any part of the figure AB, because a straight or unrefracted pencil of light, A C B, would be obstructed by the bank. Increased obliquity in pencils of light falling from an object upon a surface of water, is accompanied by still more rapidly increasing refraction but the distinctness with which the object is seen decreases in an inverse proportion. The bending or refraction which a pencil of light, as NEOFM (fig. 2.), falling very obliquely upon the surface of the water, undergoes before arriving at the eye of a fish, at O, is sufficient to produce very great indistinctness and distortion of the image of M P formed in his eye. Perhaps indistinctness of vision may, on other accounts, also take place in the eye of a fish looking through air. The crystalline and various other humours may not be capable of such comprehensive adjustment as would enable him to see so distinctly through air as he can through water. But long before a pencil of light, as N E L, becomes horizontal, it will not enter the water at |