The winter whitening of mammals is, therefore, precisely similar to the senile bleaching of human hair, no shift of the coat taking place.
This physiological wasting is termed senile atrophy.
These changes are found in senile wasting, in metaplasia of cartilage, in many tumours, especially mixed growths of the parotid gland and testicle, and in various inflammatory granulation ulcers.
Moreover, the last stages of individual life are prophetic not only of future rising and progressing derivatives, but in the case of senile individuals of future declining and degradational series.
Such injuries are apt to occur in syphilitic endarteritis, or senile arterial decay, whereby an artery may be blocked permanently, as if with an embolus, and the area supplied by it, in so far as it was dependent upon this vessel, deprived of nutrition.
His senile spite vented itself on his son Ferdinand, whose opposition to the all-powerful favourite procured for him hatred at the palace and esteem everywhere else.
When the succession of Cleves and of Julich, so long expected and already discounted by the treaty of Halle (1610), was opened up in Germany, the great war was largely due to an access of senile passion for the charms of the princesse de Cond.
In 1831 Patrick Matthew, in the appendix to a book on naval timber and arboriculture, laid stress on the extreme fecundity of nature "who has in all the varieties of her offspring a prolific power much beyond (in many cases a thousandfold) what is necessary to fill up the vacancies caused by senile decay.
As a consequence of that paralysis, but not before, the brain, already weakened by senile decay, at length gave way, and Swift sank into the dementia which preceded his death."
Under severe pressure from the cardinal archbishop of Toledo, Portocarrero, he finally made a will in favour of Philip, duke of Anjou, grandson of Louis XIV., and died on the ist of November 1700, after a lifetime of senile decay.
It has, however, been demonstrated that the senile whitening of human hair is due to the presence of phagocytes, which devour the pigment-bodies; and from microscopic observations recently made by the French naturalist Dr E.
It contains incomparable studies of the Florentine housewife and her husband, a grave business-like citizen, who falls into the senile folly of a base intrigue.
His papers, seized after the fall of Delhi, are full of senile complaint of the disrespect and discourtesy which he suffered from them.