The microclimate of the Gun San type silkworm rearing room in which, warming with charcoal fire from the floor and watering the floor and walls, the worms of earlier stage were reared was as following:-
1) As to the room temperature, a constant temperature stage was shown after a temperature rising stag of 1.5-4hours from the closure of the door. The temperature difference between the high temperatur place and low place was always less than about 1.5°C when the both pores, suction and removal, were closed butt it reached about 4°C when the pores were opened.
2) As to the room humidity, there also were to stages, a rising and a constant. The rising stage was 1-2 hours. The humidity difference between wet place and dry place was less than 10% when the both pores, suction and removal, were closed, but it reached about 20% when the pores were opened.
3) The evaporation rate of the water was about 60-80% of normal room, and was larger at lower place than at higher place.
4) The concentration of CO2-gas was at least 2-4 times as much as that of normal room (in normal room CO2 was 0.07-0.15%).
5) NH3-gas was 1.2-1.3 times that of normal room.
6) CO2-gas and NH3-gas were almost homogeneously distributed in the room.
