Abstract
Applying a differential equation
dθ/dt=-γ(θ-T),
where Θ denotes the temperature of room, air t time, T open-air _??_emperature, function of t, γ inhe_??_ent constant of room, the author calculated γ of rooms of three different houses at Ootomari in cases when T was nearly constant all night long, viz. independent of t, at cold season, with a view to investigate spontaneous cooling of room.
