A stake-yard test on 28 indigenous species was carried out to determine their natural durability. The test consisted of burying standard size timber specimens under the ground and recording the lime taken to decay. Based on the result durability classification of these Limbers has been made and suggestions arc made for their uses in practice. Since durability of a timber often dictates its preservative treatment, treatability of the same is also furnished along with this classification. It is found that non-durable Limbers arc more easily treatable than the durable ones.