...Inabout eleven days after hatching it is ready to change to achrysalis, having undergone during this period only threemoults, instead of at least four as with other caterpillars... 
Clarence M. Weed 「Butterflies Worth Knowing」
...Post em bry on' ic, development after birth or hatching...
Worrallo Whitney 「A Guide for the Study of Animals」
...Incubators are used exclusivelyfor hatching the eggs...
Harry M. Lamon 「Ducks and Geese」
...Age of Hatching Eggs...
Harry M. Lamon 「Ducks and Geese」
...At this time the fertility will run best and theresults in hatching will be most satisfactory...
Harry M. Lamon 「Ducks and Geese」
...Care of Eggs for Hatching...
Harry M. Lamon 「Ducks and Geese」
...Where an incubator is used for hatching the eggsare placed in the machine just as hens' eggs...
Harry M. Lamon 「Ducks and Geese」
...At this time themachine should be tightly closed up and left so untilthe hatching is over...
Harry M. Lamon 「Ducks and Geese」
...Moisture for Hatching Eggs...
Harry M. Lamon 「Ducks and Geese」
...When the eggs are near hatching, she will not forsake her nestwhile life remains...
Robert Jennings 「Sheep, Swine, and Poultry」
...It may not be uninteresting to note the changes which the egg passesthrough in hatching...
Robert Jennings 「Sheep, Swine, and Poultry」
...The most decided species of fever to which fowls are subject occurs atthe period of hatching, when the animal heat is often so increased as tobe perceptible to the touch...
Robert Jennings 「Sheep, Swine, and Poultry」
...Attention at hatching time...
John H. Robinson 「Our Domestic Birds」
...If the eggs hatch well fromthe start, a large grower may have his houses full by December, butusually it takes until January to complete hatching, and sometimes ittakes longer...
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」
...In a very shorttime the artificial method had displaced hatching with hens on thecommercial duck farms, and the business was growing amazingly...
John H. Robinson 「Our Domestic Birds」
...Each hatchery does the hatching for a community...
John H. Robinson 「Our Domestic Birds」
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