Read RULE XII of A Manual / An Easy Method of Managing Bees, free online book, by John M. Weeks, on ReadCentral.com.

On wintering bees

On the near approach of winter, as soon as the bees have receded from the drawers and gone below, insert a slide, take out the drawers, and supply their places with empty ones, bottom up. Suspend the bottom board at least one eighth of an inch below the lower edge of the hive, and open the ventilator. Clean off the bottom board as often as the weather changes from cold to warm. Close no doors upon them, unless they are kept in a spacious room, and in such a place that the breath and steam of the bees will not freeze.

Remarks.

Various methods have been practised by different individuals. Some have buried them in the ground, others kept them in the cellar, chamber, &c. One course only will be observed in this place.