GASTEC
Preparations
You will need:
  1. One small glass beaker (500 or 1000 mL)
  2. One candle
  3. One candle holder
  4. Matches or lighter
  5. Gas detection equipment, comprising:
    1. Gas sampling pump
    2. Carbon dioxide detector tube 2EL
    3. Carbon dioxide detector tube 2EH
    4. Oxygen detector tube 31E
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