If _super-hiving_ be the object of the apiarian, he must first withdraw the four screws out of the top board of his stock-hive or box, so as to enable him to push one of his dividers from front to back, between that board and the box which it covers; he may then safely take off the top, and screw it upon an empty box. (He would of course be enabled to accomplish the business with more promptitude, if he have a supernumerary top already screwed down.) Having put the fresh box upon a middle board, the whole is to be carefully placed upon the divider, that covers the stock: when accurately adjusted to each other, if an assistant hold firmly in their places the two boxes, or the inferior box and the middle board, the divider may be withdrawn, and thus a communication between the two boxes will immediately be effected, without the escape, and perhaps without the destruction, of a single bee. When I have had no assistant near me, upon whose steadiness I could rely, at the time of withdrawing the divider, I have fixed a piece of double quarter with one of its ends against the inferior box, and the other against the wall opposite to it, and have thus effectually prevented the box from moving, whilst with one hand I held firmly the middle board, and drew out the divider with the other. My readers are to suppose me operating in a bee-house, for in an out-door apiary an assistant will always be required, whenever any important operation is to be performed. _Nadir-hiving_ is accomplished by introducing both dividers between the floor board and the box or hive which it supports, the first with its turned edge downwards, and the other upon it with its turned edge upwards. The box or boxes are then to be removed on one side or upon a table, together with the upper plate or divider, which will form a temporary floor to the box, while the lower plate covers the wooden floor and those few bees that may be lodged upon it. In removing the box or boxes for nadir-hiving, some caution is requisite, to prevent the escape of the bees. The safest plan is gradually to draw forward the boxes with their temporary floor, till they hang nearly half over the wooden floor, and then, by spreading out the fingers and applying them under each side of the divider, the whole may be lifted up and moved wherever it be most convenient till raised upon the nadir. When the box has been drawn half off, a weight should be placed upon the covering divider, to prevent it from tilting up. The removal being accomplished, an empty box should be quickly placed upon the divider which covers the floor, and upon the box a middle board; the adjustment being complete, the dividers are to be withdrawn separately, and with the same precautions as in super-hiving. If the apiarian wish to practise _centre-hiving_ _i. e._ to introduce an empty box between a superior and an inferior one, he can easily apply the preceding directions to that particular case. CHAPTER XIX.