. Elementary biology; an introduction to the science of life. Biology. SOUND SENSATIONS 239 without any special hearing organ, cannot perceive sounds. Yet the whole skin will receive vibrations of certain frequency, and transmit them along nerve fibers, as cart be seen when an earthworm is placed on a piano and the instrument is played. Fishes are deaf in the usual sense of the word, but they are capable of detecting vibrations in the water, of a kind that we should not notice at all. The fishes probably. Fig. 100. Sound-perceiving organs in insects In the locust, .4, there is a nearly circula
. Elementary biology; an introduction to the science of life. Biology. SOUND SENSATIONS 239 without any special hearing organ, cannot perceive sounds. Yet the whole skin will receive vibrations of certain frequency, and transmit them along nerve fibers, as cart be seen when an earthworm is placed on a piano and the instrument is played. Fishes are deaf in the usual sense of the word, but they are capable of detecting vibrations in the water, of a kind that we should not notice at all. The fishes probably. Fig. 100. Sound-perceiving organs in insects In the locust, .4, there is a nearly circular membrane, connected with nerve endings, on the first segment of the abdomen. In the cricket, B, a similar hearing organ is found on one of the joints of the front leg receive these vibration impressions through a row of little spots ex- tending along each side of the body, under the skin. This " lateral line " is very prominent in some fishes (see Fig. 99). 283. Hearing in fishes. It is commonly believed that fishes hear sounds through the water, and that they will even recognize the voice of the person who feeds them. Experiments, however, show that some species are much more sensitive than others to different kinds of sounds and other vibrations. Nearly all fish can probably distin- guish vibrations through the water, especially those of low pitch. It is doubtful whether any fish can perceive sounds made in the air, since such sounds are very largely reflected from the surface of the 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 Gruenberg, Benjamin C. (Benjamin Charles), 1875-1965. Boston New York [etc. ] Ginn and company
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