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Updated: June 23, 2025
The time of incubation is different in different animals. With regard to the human being, there are various strange and contradictory stories. Some have asserted that it has appeared on the very day on which the bite was inflicted, or within two or three days of that time. Dr. Bardsley, on the other hand, relates a case in which twelve years elapsed between the bite and the disease.
It is the incubation period of the Praise of Folly that is thus obscured from view. On 21 April 1509, King Henry VII of England died.
Returning to the nest with his vanquished foe strapped to his saddle, he found Considine sitting somewhat confused among the egg-debris, much of which consisted of flattened young ones, for the eggs were in an advanced state of incubation. "Why, Charlie, are you going to try your hand at hatching?" cried Hans, laughing in spite of himself. Considine smiled rather ruefully.
An explanation is not hard to find. The correct content of moisture is not the only essential to the chick's well being at the moments of hatching, but during the whole period of incubation. Under our present system of incubation, the chick is immediately subject to the changing evaporation of American weather conditions. The data for that fact, picked at random, will be of interest.
This type is the most popular type of small incubator on the market. Its advantage will be more readily seen after the discussion of the principles of incubation. Hazy tales of Egyptian incubators have gone the rounds of poultry papers these many years.
In the egg the white part, which is analogous to the liquor amnii of quadrupeds, consists of two distinct parts; one of which is more viscid, and probably more difficult of digestion, and more nutritive than the other; and this latter is used in the last week of incubation.
The incubation of the eggs for the second brood was well under way when I appeared upon the scene in early July. My sudden presence so near their treasures, and my lingering there with books and newspapers, disturbed the birds a good deal. The first afternoon the mother bird did not enter the cavity for hours.
As far as my observations go, the nest in which the Wren lays its eggs is profusely lined with feathers; but during the period of incubation, the male apparently from a desire to be doing something constructs several nests in the vicinity of the first, none of which are lined; and whilst the first nest is so artfully concealed as to be found with difficulty, the last is very often seen.
Suddenly he paused, and listened. Strange sounds came across the water. It was, in fact, the princess laughing. Now, there was something odd in her laugh, as I have already hinted; for the hatching of a real hearty laugh, requires the incubation of gravity; and, perhaps, this was how the prince mistook the laughter for screaming.
Bonnet affirms that, before fecundation, the hen's egg contains an excessively minute but complete chick; and that fecundation and incubation simply cause this germ to absorb nutritious matters, which are deposited in the interstices of the elementary structures of which the miniature chick, or germ, is made up.
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