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Soranus, as well as the Talmud, assigned the period about menstruation as the best for impregnation, and Susruta, the Indian physician, said that at this time pregnancy most readily occurs because then the mouth of the womb is open, like the flower of the water-lily to the sunshine.
We collected it, after having added to the liquid a few drops of concentrated sulphuric acid, with the object of checking the fermentation to a great extent, and facilitating filtration. We may still further increase this ratio by making our estimation as soon as possible after the impregnation, or the addition of the ferment.
The proportions of the skeleton, the distribution of hair and fat, the construction of organs of attack and defense, the color of the skin, the cyclic processes of preparation for impregnation, the oestrus or heat period in animals, the menstrual period in the human being, the psychic reactions to danger and combat have all been thus determined.
It is quite true that the use of a suitable soluble suppository alone may be sufficient to protect against impregnation, but the protection by this means does undoubtedly fail at times, and therefore, by itself, the soluble suppository is unreliable. Still it eliminates the majority of the chances of impregnation.
Another class of mummies are those which have been found in the saltpeter and other caves of Kentucky, and it is still a matter of doubt with archaeologists whether any special pains were taken to preserve these bodies, many believing that the impregnation of the soil with certain minerals would account for the condition in which the specimens were found. Amer. Antiq.
There is a sound physiological reason for this courtship, for in the act of wooing and being wooed the psychic excitement gradually generated in the brains of the two partners acts as a stimulant to arouse into full activity the mechanism which ensures sexual union and aids ultimate impregnation. Such courtship is thus a fundamental natural fact.
It is true that the occurrence of impregnation during sleep, or in anæsthesia, cannot be opposed to it, for we know that the unconsciousness of these states by no means prevents the occurrence of complete sexual excitement.
Reproduction by division, or by single cells being converted into new families; and by resting spores formed from some of the cells after impregnation by spermatozoids formed from the contents of other cells of the same family. Plate IX. Large group of malaria plants, Gemiasma verdans, collected at 165th Street, east of 10th Avenue, New York, in October, 1881, by Dr.
Immature plumage of birds. Implacentata. Implements, employed by monkeys; fashioning of, peculiar to man. Impregnation, period of, influence of, upon sex. Improvement, progressive, man alone supposed to be capable of. Incisor teeth, knocked out or filed by some savages. Increase, rate of; necessity of checks in. Indecency, hatred of, a modern virtue.
There is far more of all these things common to the impregnate ovum and the ovum immediately before impregnation, or again between the impregnate ovum, and both the ovum before impregnation and the spermatozoon which impregnated it.
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