Abstract: In the experiment measuring heat conductivity of air, We find that the 1/Q is not always linear dependent with lip in the range of 0. 133--1.33 kPa. This derives from the effect of the airflow. As soon as the air pressure increases the temperature rises. While p p〉 1. 33 kPa, 1/Q is in departure from linear with 1/ p again.

Key words: hot line method, heat conductivity, heat conduction, airflow, quasi-statlc process