Air drying is an important mode of seasoning timber in Bangladesh where sawnjill owners and lumber dealers can hardly afford to possess modern dry kilns. Due to lack of adequate knowledge and absence of proper drying schedule, the method is not being practised effectively to get the best result. It is, therefore, considered ‘partinent to study the air drying characteristics of some of the important wood species of Bangladesh.

The establishment of efficient drying schedules for various species is dependent upon the rate at which a given species loses moisture. This is, also, affected by the drying condition existing in a particular region at any given time of the year. The present paper deals with the rate of moisture loss and air drying time of 10 indigenous wood species of Bangladesh under two conditions of exposure.