Eighth. The formation of new colonies should ordinarily be confined to the season when bees are accumulating honey; and if this, or any other operation, must be performed when forage is scarce, the greatest precautions should be used to prevent robbing. The essence of all profitable bee-keeping is contained in Oettl's Golden Rule: KEEP YOUR STOCKS STRONG. If you cannot succeed in doing this, the more money you invest in bees, the heavier will be your losses; while, if your stocks are strong, you will show that you are a _bee-master_, as well as & bee-keeper, and may safely calculate on generous returns from your industrious subjects. _"Keep all colonies strong."_ APPENDIX. HISTORY OF MOVABLE FRAMES. Movable frames have revolutionized bee-keeping, and so out-rank the reaper and mower, and equal the cotton-gin. Few inventions have exerted so powerful an influence upon the art which they serve. Their history will ever be a subject of exceeding interest to bee-keepers, and their inventor worthy the highest regard as the greatest benefactor of our art. In writing their history, I have no personal interest or bias, and am only impelled by a love of truth and justice. I am the more eager to write this history, as some of our apiarists, and they among the best informed and most influential (_American Bee Journal_, vol. 14, p. 380), are misinformed in the premises. In obtaining the data for this account, I am under many obligations to our great American master in apiculture. Rev. L. L. Langstroth, whose thorough knowledge and extensive library have been wholly at my command. We are informed by George Wheeler, in his "Journey into Greece," published in 1682, page 411, that the Greeks had partial control of the combs. "The tops" of the willow hives "are covered with broad flat sticks. Along each of these sticks the bees fasten their combs; so that a comb may be taken out whole." Swammerdam had no control of the comb, nor had Réaumur. The latter used narrow hives, which contained but two combs; but these were stationary. Huber was the first to construct a hive which gave him control of the combs and access to the interior of the hive. In August, 1879, Huber wrote to Bonnet as follows: "I took several small fir boxes, a foot square and fifteen lines wide, and joined them together by hinges, so that they could be opened and shut like the leaves of a book. When using a hive of this description, we took care to fix a comb in each frame, and then introduced all the bees."--(Edinburgh edition of Huber, p. 4). Although Morlot and others attempted to improve this hive, it never gained favor with practical apiarists. [Illustration: Fig. 111.]