Air
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Uses a boy's kite, a farmer's windmill, and the air brakes on a train as illustrations of the uses of air. Show the importance of the properties of air to animal and plant life, industry, and commerce. Air pressure is explained by demonstrations the child can perform himself.
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- 16mm Filmography (legacy record) — title, creator, length, format, color, description, catalog record
Original permalink · Record added 2024-04-22 21:28:12