Inhaltsangabe
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908. Excerpt: ... Lesson 36 The Ears Of Lower Animals Observe the ears of a horse and of a cow. Draw the heads of these animals and show the position and direction of the ears of animals that have horns and of those that have no horns. Notice how the ears of the horse open and how they turn. Can one ear turn in one direction and one in another? How does the horse turn its ears when it is quiet? when it is listening? when it is angry? Draw or mount a picture of an animal that has large, movable ears. Draw or mount a picture of an animal that has long, pointed ears that stand erect. Draw or mount a picture of an animal that has small, round ears. Draw or-mount a picture of an animal that has long, broad, drooping ears. Draw or mount a picture of an animal that has short, stiff, pointed ears. Can you tell by the size and the shape of the ears whether the hearing of animals is acute or not? Can the following animals hear: a bird, a frog, /lOTrrrrfh. a sn' Have they outer ears? Can you see 'ttHcxtmfci' on their heads any parts that look like ears? Describe what you find. Some of the lower animals can-hear, but they have no ears. The sense of hearing is placed in other parts of their bodies. In the clam it is found at the base of the part called the foot; in the grasshopper, on the first ring of the abdomen, there is on each side a little ear-drum that is thought to be the organ of hearing; in many insects it is on the wings, and in crabs and lobsters, at the base of their antennas. Write one statement about each picture that you have drawn or mounted. Write a true story proving that an animal has an acute sense of hearing. Lesson 37 The Human Ear Observe the part of the ear that you can see. This part is called the "outside ear." Notice its shape, its irregular surface, and how...
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