《空气的成分》一课的实验是:把粘有蜡烛的玻璃片放在水槽中,往水槽里倒入一些清水,点燃蜡烛,再用玻璃杯罩上进行实验。这样,由于水槽里水面淹没了一段蜡烛,再用玻璃杯罩上后,玻璃杯内已经先有一部分水了,因此该实验只能确定空气中至少含有两种气体,一种支持燃烧(以下 The lesson of “The Air's Composition” lesson was to put the glass with the candle in the sink, pour some clear water into the sink, light the candle, and cover with glass. In this way, the water in the sink flooded a candle, and then covered with glass, the glass has been part of the water, so the experiment can only determine that the air contains at least two gases, one to support the combustion (below