Of all the senses, that of smell in the bee, seems to be the most perfect. Huber has demonstrated its exceeding acuteness, by numerous interesting experiments. If honey is placed in vessels from which the odor can escape, but in which it cannot be seen, the bees will soon alight upon them and eagerly attempt to find an entrance. It is by this sense, unquestionably, that they recognize the members of their own community, although it seems to us very singular that each colony should have its own peculiar scent. Not only can two colonies be safely united by giving them the same odor, but in the same way any number of colonies may be made to live in perfect peace. If hundreds of hives are all connected by gauze wire ventilators, so that the air passes freely from one to another, the bees will all live in absolute harmony, and if any bee attempts to enter the wrong hive, he will not be molested. The same result can often be attained by feeding colonies from a common vessel. I have seen literally hundreds of thousands of bees that after being treated in this way so as to acquire the same odor, were always gentle towards each other, while if a single bee from a strange Apiary, lit upon the feeder, it was sure to be killed. I have described, (p. 213,) the use which I make of peppermint, in order to prevent bees from quarreling when they are united. The Rev. Mr. Kleine, (see p. 359,) in a recent number of the Bienenzeitung, has recommended the use of another article, which he finds to be very useful in preventing robbing. His statement would have come in more appropriately in the Chapter on Robbing, but was not received until too late. He says that the most convenient and effectual mode of arresting and repelling the attacks of robbers, is, to impart to the attacked hive some intensely powerful and unaccustomed odor. He effects this most readily, by placing a small portion of _musk_ in the attacked hive, late in the evening, when all the robbers have retreated. On the following morning, the bees, (provided they have a healthy queen,) will promptly and boldly meet their assailants, and these in turn are non-plussed by the unwonted odor, and if any of them enter the hive and carry off some of the coveted booty, they will not be recognized nor received at home on their return, on account of their strange smell, but will be at once seized as strangers, and killed by their own household. Thus the robbing is speedily brought to a close.