Longman's object lessons; hints on preparing and giving them, with full notes of complete courses of lessons on elemetary science - Softcover

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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. 1892 Excerpt: ...parts of Europe and Asia, but their great home is now the northern part of North America. Impress upon the children that the climate of those parts is very cold, and elicit that as the beaver spends most of its time in the water it needs a specially warm covering. Fur.--The beaver has two coats of fur--an under layer of short soft gray hair lying close to the body, and an upper layer of thicker and longer chestnut hair forming a kind of thatch. Because of its warmth beaver skin is much valued for muffs, jackets, cloaks, &c. Feet.--' What sort of feet has the duck?' 'Why are they webbed?' The hind feet of the beaver are webbed for the same reason. Tail.--Compare the tail to the rudder of a boat and to the screw of a steamship. It is covered not with fur but with scales. 'Like?' Teeth.--The beaver is a gnawing animal. 'Like?' Food.--It lives on the bark of trees. Size.--The beaver is the largest of the gnawing animals. It is over 2 feet long from the nose to the root of the tail, and the tail is over a foot long. Dams.--In very cold countries the streams are often frozen down to the ground, and in the short, hot summer they are sometimes dried up. To keep both these things from happen ing in the streams where they live, beavers make the water much deeper by building great dams right across them. Illustrate by a good blackboard sketch, or by having a box or little trough for the bed of the stream, and compare to a mill dam, or to the big pool the children themselves may have made by damming back the water in the gutter on a rainy day. Having chosen a suitable spot where there is a tree growing on the bank, the beavers gnaw at it till it falls across the stream. Should one tree not be long enough, they similarly gnaw another on the opposite bank. These tree...

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