. The world of animal life. Zoology. SEALS 93 in the ground, or swim through the water. Birds, wood-boring beetles, moles, and fishes all have bodies shaped like pointed cylinders. We adopt the same shape, too, for our bullets, which are to fly- through the air; our gimlets and augers, which bore holes in wood; our well-sinking tools, which bore holes in the ground; and our torpedoes, those terrible explosive weapons which are designed to attack a ship below the water-line. The structure of a seal's skeleton, again, helps it greatly in. Skeleton of Seal swimming, for the vertebrae, or small bo
. The world of animal life. Zoology. SEALS 93 in the ground, or swim through the water. Birds, wood-boring beetles, moles, and fishes all have bodies shaped like pointed cylinders. We adopt the same shape, too, for our bullets, which are to fly- through the air; our gimlets and augers, which bore holes in wood; our well-sinking tools, which bore holes in the ground; and our torpedoes, those terrible explosive weapons which are designed to attack a ship below the water-line. The structure of a seal's skeleton, again, helps it greatly in. Skeleton of Seal swimming, for the vertebrae, or small bones of the spine, are not fastened so closely together as in many other animals, but are more from one another by a cushion of cartilage or gristle. This is very elastic, so that the spine can be bent and curved in all directions, and the animal is enabled to twist and turn in the water with the most perfect ease and activity. So proficient, indeed, are seals in the arts of swimming and diving, that they can overtake and capture fish in their own element. Their teeth, too, are studded with a great number of sharp jagged points, which points enter the body, and prevent the lithe, slippery creature from breaking away. The ears of the seal are so formed that they are immediately closed by the pressure of water upon them. They are constructed, in fact, upon precisely the same principle as "flood-gates" The greater the pressure upon these gates, the more securely they. 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 Smith, Fred, pseud. , ed. London, Glasgow [etc. ] Blackie and son, Ltd.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1910
