Crocker
mentions the changes which have occurred in rare instances after
death from dark brown to red.
Chemic colorations of various tints occur. Blue hair is seen in
workers in cobalt mines and indigo works; green hair in copper
smelters; deep red-brown hair in handlers of crude anilin; and
the hair is dyed a purplish-brown whenever chrysarobin
applications used on a scalp come in contact with an alkali, as
when washed with soap. Among such cases in older literature
Blanchard and Marcellus Donatus speak of green hair; Rosse saw
two instances of the same, for one of which he could find no
cause; the other patient worked in a brass foundry.
Many curious causes are given for alopecia. Gilibert and Merlet
mention sexual excess; Marcellus Donatus gives fear; the
Ephemerides speaks of baldness from fright; and Leo Africanus, in
his description of Barbary, describes endemic baldness. Neyronis
makes the following observation: A man of seventy-three,
convalescent from a fever, one morning, about six months after
recovery perceived that he had lost all his hair, even his
eyelashes, eyebrows, nostril-hairs, etc. Although his health
continued good, the hair was never renewed.
The principal anomalies of the nails observed are absence,
hypertrophy, and displacement of these organs.
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