V.]
CUP-SHAKE.
33
presence to the surveyor while the tree is standing. It can only, therefore, be dealt with when discovered in the log, after being felled. This defect is, to some extent, local, and is especially so among the Oaks, it being more frequently met with in the Sicilian Oak than in, perhaps, any other. It occurs in Virginian Pitch Pine, and it is often found in Lignum Vitæ. It is worthy of notice that whatever may be the cause of the cup-shake in the last-named wood, which is grown extensively in St. Domingo, latitude 18° to 20° N., and where the temperature of the winter is rarely below 60°, it cannot have suffered from frost.
d
