...Several females often lay in one nest, so that the number of eggsin it frequently makes incubation impossible...
P. L. Sclater 「Argentine Ornithology, Volume I (of 2)」
...Occasionallyalso duck farmers buy from each other a feweggs for incubation in order to secure new blood...
Harry M. Lamon 「Ducks and Geese」
...Usuallythey will be dried so that they can be movedon the afternoon of the 28th day of incubation...
Harry M. Lamon 「Ducks and Geese」
...During the last week of incubation it is desirableto sprinkle the eggs daily with water using quite aliberal amount as duck eggs seem to require moremoisture than hens' eggs in order to hatch well...
Harry M. Lamon 「Ducks and Geese」
...When the eggs are laid the male desertsthe female, leaving to her the task of incubation and careof the young...
Frank M. Chapman 「What Bird is That?」
...Her natural temperature is somewhat elevatedby the feverish condition of the bird at the period of incubation...
Richard L. Allen 「Domestic Animals」
...The hen manifests the desire of incubation in a manner different fromthat of any other known bird...
Robert Jennings 「Sheep, Swine, and Poultry」
...Infectious diseases have, as a general rule, a period of incubation, whichcomprises the time elapsing between the exposure to the infection and theactual appearance of the disease...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...The stage of incubation is from three to five days...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...In aërial birds (except the cuckoos) the maleand female pair, build a nest, and both take part in the incubation ofthe eggs and the feeding of the young...
John H. Robinson 「Our Domestic Birds」
...An infertile egg is clear, that is, shows no signs ofdevelopment or decay, at every period of incubation...
John H. Robinson 「Our Domestic Birds」
...Still another important development due to artificial incubation tookplace in California...
John H. Robinson 「Our Domestic Birds」
...The period of incubation is four weeks...
John H. Robinson 「Our Domestic Birds」
...The period of incubation for guinea eggs is four weeks...
John H. Robinson 「Our Domestic Birds」
...The period of incubation is six weeks...
John H. Robinson 「Our Domestic Birds」
...Period of Incubation...
Honoré Bourguignon 「On the cattle plague: or, Contagious typhus in horned cattle. Its history, origin, description, and treatment」
...The means of treating it at its different periods, from the periodof incubation to that of its decline...
Honoré Bourguignon 「On the cattle plague: or, Contagious typhus in horned cattle. Its history, origin, description, and treatment」
...First Period—of Incubation...
Honoré Bourguignon 「On the cattle plague: or, Contagious typhus in horned cattle. Its history, origin, description, and treatment」
...Most birds, whenseized by the mania of incubation, will sit upon anything which evenremotely resembles an egg...
Douglas Dewar 「Birds of the Indian Hills」
...As it is, after fourteen days' incubation, the eggsare hatched simultaneously, or nearly so, the Cuckoo being generallythe first...
Rev. C. A. Johns 「British Birds in their Haunts」
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