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.
India, difficulty of distinguishing the native races of; Cyprinidae of;
colour of the beard in races of men of.
Indian, North American, honoured for scalping a man of another tribe.
Individuality, in animals.
Indolence of man, when free from a struggle for existence.
Indopicus carlotta, colours of the sexes of.
Infanticide, prevalence of; supposed cause of; prevalence and causes
of.
Inferiority, supposed physical, of man.
Inflammation of the bowels, occurrence of, in Cebus Azarae.
Inheritance, of long and short sight; of effects of use of vocal and
mental organs; of moral tendencies; laws of; sexual; sexually limited.
Inquisition, influence of the.
Insanity, hereditary.
insect, fossil, from the Devonian.
Insectivora, absence of secondary sexual characters in.
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