抄録
Freezing phenomenon of the distilled water including dissolved air has been investigated experimentally. The Ice layer including air depends on the freezing direction and the freezing rate. In case of the freezing from the bottom side, the layer was divided into three patterns; ice layer involving many small bubbles, ice layer involving muscle-shaped bubbles and transparent ice layer. In case of the freezing from the top side, it was divided into two patterns except the transparent ice layer. The diameter of air bubble trapped in ice layer was related to the freezing rate. The effect of air mass dissolved in water on the freezing was discussed only in phenomenological.
