When the first plate of wax is in position, the little worker will take the other plates one by one from her wax-pockets, and knead them as she did the first. Each in turn will be placed on the foundation, and then the bee will again join the cluster. Immediately she disappears, however, her place will be taken by another, who goes through exactly the same process. She in turn will be followed by another, and so on, until a small piece of beautiful white wax hangs from the roof. At this stage it is time for the architects to plan out the position and shape of the first cells, which are to be sculptured out of the wax. If we watch, we may see one of these bees appear, and it is evident that she knows exactly what to do, and just what shape the first cell is to be. She moulds the unformed wax by means of her jaws, and very soon the outline of the cell is seen. It is hollowed out, and the wax removed in this process is carefully placed so as to form the walls. Meanwhile, another architect has been doing a similar thing on the opposite side of the piece of wax, for the cells are built back to back, as by this arrangement there is a saving of material. The wax-makers continue to add more and more wax, the sculptors go on with their work, and soon the form of the comb becomes apparent. I suppose every one knows that bee cells are hexagonal, or six-sided. If they were made circular, you can easily understand that there would be a great deal of space and material wasted, for the spaces between the cells would need to be filled up. Then, again, if they were made diamond-shaped, there would still be places to fill in. It is true they might be made four-sided, but apart from the fact that such cells would not be strong enough, it is not possible for them to be made thus, for the angles would be too great for the bees to get their jaws into the corners. It has been found that six-sided cells are the strongest and the most economical, but how the bees found this out, too, is a mystery. [Illustration: CRADLE CELLS.] There are three kinds of bee cells: firstly the cradle cells, in which the young bees are reared. They are 1/2 inch deep and 1/5th inch in diameter. There will therefore be about twenty-eight in a square inch of comb, but as the drone is slightly larger than the worker, his cradle must be bigger. We find accordingly that the drone cells are 1/4th inch in diameter, or about eighteen to the square inch. Then there are the royal cells, which are altogether different. In them the young queens are reared, and in appearance they are something like acorn cups. In Plate XX. you see a picture of a frame of comb, taken from the hive with the bees still on it. The bee-man is pointing to two of these queen cells, and you will see that they hang downwards, in a place where the ordinary comb has been cut away to make room for them.