The Study of the Physical Sciences Their Value in Education And the Part They P
The Study of the Physical Sciences Their Value in Education And the Part They P
George D Wood
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F 1. Bespiration vitiates the air by removing oxygen. 2. Man requires oxygen. Inference : Ventilation necessary. III. J 1. Iron heated, increases in bulk. ( 2. Hot water requires more space than cold. Inference (generalization) : Heat expands matter. IV. J 1 . Pendulums swing more slowly at the equator than in 45 degrees lat. 2. Pendulums swing faster at the arctic circle than in 45 degrees lat. 3. But pendulums obey the attractive force of the earth. 4. Then the attraction of the earth at the ...surface varies. 5. But attractive force is equal at equal dis- tances. 6. Then the equator is further from the centre of the earth than either the 45 degrees lat. Or polar regions. 7. And (final inference) the earth is not a PERFECT SPHERE. 14 THE PHYSICAL SCIENCES. By a process of this kind, drawing conclusions from ascertained facts, then making use of the newly dis- covered principle to reach a higher generalization, almost all our knowledge of nature's laws has been obtained. A simple inference of this kind laid the foundation of modern Astronomy.
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