抄録
In purpose to know the process of the heat transmission through the air layers in the walls, we made the experiment about its transmission velocity. When one side of an air layer was heated suddenly from the natural temperature to the higher, the conductional movement and thermal change of the air in the layer became to the steady state within 1 minute. These results are shown by fig. 1-3. Then we can assume that the heat conduction through the air spaces in the walls which are even in fire is done in a steady state properly for the condition of their both sides temperature. We made another experiment on the thermal conductance of the air spaces in the vertical walls in the various temperature which were made by alminium foils or soft fiber boards. Their results are shown by fig. 4-6.
