If the cold merely destroyed feeble colonies, or strong ones only now and then, it would not be so formidable an enemy; but every year, it causes many of the most flourishing stocks to perish by starvation. The extra quantity of food which they are compelled to eat, in order to keep up their heat in their miserable hives, is often the turning point with them, between life and death. They starve, when with proper protection, they would have had food enough and to spare.
But some one may say, "What possible difference can the kind of hives in which bees are kept make in the quantity of food which they will consume?" Enough, I would reply, in some single winters, to pay the difference between a good hive and a bad one!
I cannot move my finger, or wink my eye-lids without some waste of muscle, however small; for it is a well-ascertained law in our animal economy, that all muscular exertion is attended with a corresponding waste of muscular fibre. Now this waste must be supplied by the consumption of food, and it would be as unreasonable to expect constant heat from a stove without fresh supplies of fuel, as incessant muscular activity from an insect, without a supply of food proportioned to that activity. If then we can contrive any way to keep our bees in almost perfect quiet during the Winter, we may be certain that they will need much less food than when they are constantly excited.
In the cold Winter of 1851-2, I kept two swarms in a perfectly dry and dark cellar, where the temperature was remarkably uniform, seldom varying two degrees from 50° of Fahrenheit; and I found that the bees ate very little honey. The hives were of glass, and the bees, when examined from time to time, were found clustered in almost death-like repose. If these bees had been exposed in thin hives in the open air, they would, in all probability, have eaten four times as much; for whenever the sun shone upon them, or the atmosphere was unusually warm, they would have been roused to injurious activity, and the same would have been the case, when the cold was severe. Exposed to sudden changes and severe cold, they would have been in almost perpetual motion, and must have been compelled to consume a largely increased quantity of food. In this way, many colonies are annually starved to death, which if they had been better protected, would have survived to gladden their owner with an abundant harvest. This protection, as a general thing, must be given to them in the open air, for it is a very rare thing, to meet with a cellar which is dry enough to prevent the combs from moulding, and the bees from becoming diseased.
Bees never, unless diseased, discharge their fæces in the hive; and the want of suitable protection, by exciting undue activity, and compelling them to eat more freely, causes their bodies to be greatly distended with accumulated fæces. On the return of warm weather, bees in this condition being often too feeble to fly, crawl from their hives, and miserably perish.
I must notice another exceedingly injurious effect of insufficient protection, in causing the moisture to settle upon the cold top and sides of the interior of the hive, from whence it drips upon the bees. In this way, many of their number are chilled and destroyed, and often the whole colony is infected with dysentery. Not unfrequently, large portions of the comb are covered with mould, and the whole hive is rendered very offensive.
This dampness which causes what may be called a rot among the bees, is one of the worst enemies with which the Apiarian in a cold climate, has to contend, as it weakens or destroys many of his best colonies. No extreme of cold ever experienced in latitudes where bees flourish, can destroy a strong colony well supplied with honey, except indirectly, by confining them to empty combs. They will survive our coldest winters, in thin hives raised on blocks to give a freer admission of air, or even in suspended hives, without any bottom-board at all. Indeed, in cold weather, a very free admission of air is necessary in such hives, to prevent the otherwise ruinous effects of frozen moisture; and hence the common remark that bees require as much or more air in Winter than in Summer.
When bees, in unsuitable hives, are exposed to all the variations of the external atmosphere, they are frequently tempted to fly abroad if the weather becomes unseasonably warm, and multitudes are lost on the snow, at a season when no young are bred to replenish their number, and when the loss is most injurious to the colony.
From these remarks, it will be obvious to the intelligent cultivator, that protection against extremes of heat and cold, is a point of the VERY FIRST IMPORTANCE; and yet this is the very point, which, in proportion to its importance, has been most overlooked. We have discarded, and very wisely, the straw hives of our ancestors; but such hives, with all their faults, were comparatively warm in Winter, and cool in Summer. We have undertaken to keep bees, where the cold of Winter, and the heat of Summer are alike intense; and where sudden and severe changes are often fatal to the brood: and yet we blindly persist in expecting success under circumstances in which any marked success is well nigh impossible.
That our country is eminently favorable to the production of honey, cannot be doubted. Many of our forests abound With colonies which are not only able to protect themselves against all their enemies, the dreaded bee-moth not excepted, but which often amass prodigious quantities of honey. Nor are such colonies found merely in new countries. They exist frequently in the very neighborhood of cultivators whose hives are weak and impoverished, and who impute to a decay of the honey resources of the country, the inevitable consequences of their own irrational system of management. It will not be without profit, to consider briefly under what circumstances these wild colonies flourish, and how they are protected against sudden and extreme changes of temperature.