Abstract
1. The temperatures of fires were measured by means of iron-constantan thermocouples or chromel-alumel thermocouples. In order to prevent such electrical accidents as the electric leakage, the thermocouple wire was covered with the glassfiber tube coated with silicon of 2mm in outside diameter. The time constant of the thermocouple for air temperature measurement was about 6-8 seconds at the condition of wind velocity of 2-3m/s. In the measurement of burning temperatures, the tip of each thermocouple was located horizontally at the stipulated height. 2. The output of each thermocouple was led to 2 units of portable electoromagnetic oscillograph recorder with 14 channels. The recording apparatus were operated using the accumulator of direct current of 12 volt. 3. By means of such methods, the synchronized measurement of temperature change at ten and several points from 10cm in the ground to 2m above the ground was made possible.
