CONTENTS 



LABORATORY EXERCISES 



EXERCISE PA.QE 



1. Air Takes Up Room 1 



2. How to Measure Length and Area 3 



3. The Measuring of Volume and Capacity 4 



4. How to Weigh 5 



5. Plumb Line and Pendulum 7 



6. Inertia and Centrifugal Force 9 



7. Adhesion of Liquids to Solids; Liquid Surfaces 10 



8. Capillary Action 12 



9. Density 13 



10. Weight of a Stone in Air and in Water 14 



11. Center of Mass 15 



12. Pressure of the Atmosphere 16 



13. Pressure of Water and of Air 17 



14. Collecting a Gas Over Water 18 



15. Substances Produced in Breathing and Burning 19 



16. Heating of Tin in Air 20 



17. Preparing Oxygen 21 



18. Air Dissolves in Water 22 



19. Nitrogen; the Composition of Air 23 



20. Expansion and Contraction of Water 24 



21. Expansion and Contraction of Air 25 



22. Melting Point and Freezing Point; A Freezing Mixture. ... 26 



23. Boiling Points of Water and Alcohol 27 



24. Conduction of Heat 27 



25. Convection 28 



26. Is Heat Used Up When a Liquid is Changed to a Gas? .... 29 



27. Kindling Temperature 30 



28. Mixing Materials of Different Temperatures 30 



29. Contents of Natural Water 31 



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