File:The fly-fisher's entomology - Illustrated by coloured representations of the natural and artificial insect, and accompanied by a few observations and instructions relative to trout-and-grayling (14782736592).jpg

Identifier: flyfishersentomo1836rona (find matches)
Title: The fly-fisher's entomology : Illustrated by coloured representations of the natural and artificial insect, and accompanied by a few observations and instructions relative to trout-and-grayling fishing
Year: 1836 (1830s)
Authors: Ronalds, Alfred
Subjects: Fishing Flies, Artificial Fly fishing
Publisher: London : Longman, Rees, Orme, Brown, Green, and Longman
Contributing Library: University of New Hampshire Library
Digitizing Sponsor: University of New Hampshire Library

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te subjectto more able and learned speculators, it is suffi-cient to know that the above mentioned Trout hadno ears to hear either the voices or the gun; and Ifirmly believe, that the zest which friendly chatoften imparts to the exercise of our captivating-art, need never be marred by an apprehension thatsport will be impaired thereby. Sight. Of all the senses in fish, sight is perhaps theone of most importance to them. Their eyes areperfectly adapted to the element they inhabit;indeed their subsistence seems to depend almostentirely upon the great sensibility of the opticnerve and the just adaptation of the crystallineand other humours to their proper office. A fish can perhaps frequently distinguish (withgreater or less distinctness) much ??iore of objectswhich are out of his own element than it is oftenimagined that he can. When A B (fig. 1. plate 2), for instance, situatedupon a certain eminence at a given distance froma fish, C, which is near the bottom of the water, /Ig. cP PbHl
Text Appearing After Image:
ON THE TROUT. 9 looks over the edge of a bank, D, in the directionA F Z, he might (if unacquainted with the laws ofrefraction) imagine, that neither the fish C, norany other fish below the line of his direct vision,A F Z, could see him ; whereas C could see A Bby means of the pencil of light, A F C E B, bent,or refracted at the surface of the water, E F, andthe image of A B would appear in the eye of thefish diminished and transferred to G H. The fishin short could see the whole of the man, round, orover the edge of the bank, by the aid of the waterabove C, if both were situated as respectivelyrepresented in the diagram; but if the surface ofthe water should be at I K, (i. e.) about as low asthe fishes eye, then, he could not see any part ofthe figure A B, because a straight or unrefractedpencil of light, A C B, would be obstructed bythe bank. Increments of obliquity in pencils of light fall-ing upon a surface of water, &c. are accompaniedby increments of refraction, not in direct

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