...Many authors maintain that impregnation takes place in the closed flower, but I am sure from my own observations that this is not the case, at least with those varieties to which I have attended... 
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...The influence of a first impregnation upon subsequent progeny by othermales is at times curiously illustrated...
Robert Jennings 「Sheep, Swine, and Poultry」
... But after the queen's impregnation, when flowers begin to close sooner, and open later, the spirit one morning will coldly decree the simultaneous and general massacre of every male...
Maurice Maeterlinck 「The Life of the Bee」
...It is not till after the impregnation of the nuptial flight that she can produce workers or drones at will...
Maurice Maeterlinck 「The Life of the Bee」
... WE will now consider the manner in which the impregnation of the queen-bee comes to pass...
Maurice Maeterlinck 「The Life of the Bee」
...You have most agreeably surprised me, Sir, with your interestingdiscovery of the impregnation of the queen bee...
Francis Huber Anonymous 「New observations on the natural history of bees」
...These remarkable facts of impregnation are also of the greatestinterest in psychology, especially as regards the theory of the cell-soul,which I consider to be its chief foundation...
Ernst Haeckel 「The Evolution of Man」
...Hence, no scientist whois acquainted with the facts doubts that the processes of impregnation are justthe same in man as in the other animals...
Ernst Haeckel 「The Evolution of Man」
...He found in the uterus of arabbit four days after impregnation small, round, loose, transparent vesicles,with a double envelope...
Ernst Haeckel 「The Evolution of Man」
...[Belief in the impregnation of women by the moon...
Sir James George Frazer 「Balder The Beautiful, Vol. I.」
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