(4) Use two hive bodies as a brood chamber throughout the year except during the honey flow. Have both as well filled with brood as possible previous to the flow. About 10 days before the honey flow is expected to begin, insert a queen-excluding honey board (fig. 2) between the two hive bodies. The queen is now confined to a single one of the hive bodies. After 10 days transfer the queen[7] to the other hive body placed on the old stand and put on the supers. Remove the hive body in which the queen has been confined to one side of the colony on the old stand and supply it with a ripe queen cell (in a protector) or a virgin queen. When the young queen begins to lay, exchange places with the two hive bodies so that the one containing the young queen now becomes the storing colony, giving it the supers and field bees. Shift the hive containing the old queen from one side to the other of the colony on the old stand about once a week, so that the entire flying force of both are at work in the hive with the supers (p. 31). At the close of the honey flow the old queen may be killed unless she is especially valuable and the two divisions may be reunited. The period of 10 days during which no eggs are laid in the hive body used by the storing colony at the beginning of the honey flow should delay swarming at least until the young queen begins to lay. When the other hive body with the young queen is substituted, it has had a similar period of no egg laying in addition to having a young laying queen, making a desirable combination. [7] It is not necessary to find the queen, since the presence of unsealed brood indicates In which hive body she is confined. She may be transferred to the other hive body by shaking all the bees from the combs she is known to occupy in with the bees of the other hive body. In this case some bees are returned to the shaken combs (p. 38) before this brood is set aside, to prevent its being chilled. =Mechanical devices.=--A number of mechanical devices have been described for shifting bees from one brood chamber to another. These permit the bees to leave the hive when going to the fields and are so arranged that the returning bees are led to enter the new brood chamber. This is accomplished by means of switches in the bottom board or by a chute or tube so attached that the entrance to the old brood chamber is closed, allowing exit only through the tube which opens near the entrance of the new brood chamber. In either case the hives are so arranged that the bees returning from the field readily enter the new brood chamber. The queen is found and together with a comb of brood and adhering bees is put into the new brood chamber, and the supers are transferred from the old to the new brood chamber. The young bees as they learn to fly are added to the swarm by the same device. Otherwise the manipulation is the same as the other methods described. =SEPARATING THE QUEEN AND BROOD WITHIN THE HIVE.=