...“All those which are in the centre of the nest with their points upwards are the eggs for hatching... 
Captain Frederick Marryat 「The Mission; or Scenes in Africa」
...The moulting season is not during the hatching season, butis after the hatching season...
William T. Hornaday 「Our Vanishing Wild Life」
...Few, if any, of these evercould succeed in hatching their young and winningthem through to the feathered stage...
George Murray Levick 「Antarctic Penguins」
...Like the others, this butterflyis single-brooded, laying the eggs on or near violets late insummer, the eggs hatching into larvae that take no fooduntil the following spring...
Clarence M. Weed 「Butterflies Worth Knowing」
...By selecting thelarge eggs for hatching and by liberal feeding, it iseasy to increase the size of Mallards to such an extentthat they resemble small Rouens rather thanwild Mallards...
Harry M. Lamon 「Ducks and Geese」
...Eggs for hatching must be shipped when they arefresh as duck eggs tend to deteriorate in qualityquite rapidly...
Harry M. Lamon 「Ducks and Geese」
...Incubators are used exclusivelyfor hatching the eggs...
Harry M. Lamon 「Ducks and Geese」
...Care of Hatching Eggs...
Harry M. Lamon 「Ducks and Geese」
...Any place suitable for keepinghens' eggs for hatching is a suitable place forduck eggs...
Harry M. Lamon 「Ducks and Geese」
...There are always, however, a certain number ofcracked eggs and others which may be too large ortoo small to use for hatching and which are thereforemarketed...
Harry M. Lamon 「Ducks and Geese」
...Washing does notseem to injure their hatching qualities...
Harry M. Lamon 「Ducks and Geese」
...Ofcourse the price of eggs for hatching like that ofbreeding birds depends on the quality of the stock...
Harry M. Lamon 「Ducks and Geese」
...Moisture for Hatching Eggs...
Harry M. Lamon 「Ducks and Geese」
...As to the choice of eggs for hatching, such should be taken, of course,as are believed to have been rendered productive...
Robert Jennings 「Sheep, Swine, and Poultry」
...The hatching season...
John H. Robinson 「Our Domestic Birds」
...Success in artificial hatching requires careful attention to theoperation of the incubator and good judgment in adjusting and regulatingit...
John H. Robinson 「Our Domestic Birds」
...On this scale themethods should be similar to those used on the special duck farms,except that the hatching might be done with hens...
John H. Robinson 「Our Domestic Birds」
...After Réaumur many others experimented with artificial hatching...
John H. Robinson 「Our Domestic Birds」
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