James H. Cook, Strathroy, Ontario, sends a very pretty specimen of a twin apple. Such cases sometimes occur. The two original stems are less than one-fourth of an inch apart. From this upwards there is a complete union for about three-fourths the distance to the apex, where the apple again separates to two distinct ones, each having its separate calyx and crown. It shows that in some very early stage the two apples were quite distinct, and united later. But as there is no trace of skin in the joined portion, we may learn this further fact, either that skin is not formed until there is a contact with the atmosphere, or else it is absorbed and changed into ordinary cell tissue after being formed. In the Wistaria bark- that is skin - is often found in the stem after the wood has been cut across, it having come about by the over-growing of the irregular outline of the wood, which does not grow in regular circles. The bark is not absorbed in these cases, so we are brought down to the probability that these twins, originally distinct, formed their union before they had any skin properly so-called.