COMMON THINGS. 



FIRE. 



1. Fire an ancient element. 2. Combustion. 3. Fuel. 4. Carbon. 

 5. Hydrogen. 6. Charcoal fire. 7. Its effect on the air. 8. 

 Experimental illustration of combustion of charcoal. 9. Combustion 

 of hydrogen. 10. How the combustion is continued. 11. Carbon 

 burns without flame. 12. What is flame ? 13. Combustion of 

 hydrogen produces water 14. All combustibles produce carbonic acid 

 and water. 15. Carburetted hydrogen. 16. Carbon renders flame 

 white. 17. Olefiant gas. 18. Light carburetted hydrogen. 19. 

 Fire-damp. 20. Will-'o-the-Wisp. 21. Experimental illustration. 

 22. Heavy carburetted hydrogen. 23. Pit-coal 24. Coal-fire ex- 

 plained. 25. Products of its combustion. 26. Its effect on the air. 

 27. Wood-fuel. 28. Combustibles used for illumination. 29. 

 Their effect on the air. 30. Construction of grates and chimneys. 

 31. Analysis of a common coal-fire. 32. It warms and ventilates. 

 33. Necessity for ventilation. 34. Injurious effect of plants at night. 

 35. Effect of crowded and brilliantly lighted rooms. 36. Expla- 

 nation of the burning of a candle. 37. And of lamps. 



1. Iff the physical theory which prevailed among the ancients, 

 and which maintained its ground for several thousand years, Fire 

 was accounted as one of the elements ; that is to say, as a material 

 LAEDNER'S MUSEUM OF SCIENCE. 193 



No. 22. 



