1082

DISEASES OF THE APPENDAGES

sign. The administration of jaborandi has also favored the excretion
of large quantities, as in the experiments conducted by Hardy and Ball.¹
It is to be seen upon the skin as a whitish coating, bearing a rough re­
semblance to hoar-frost or a sprinkling of flour. Under the microscope
is is noted to be made up of crystalline or irregular powdery masses.
The deposit is generally most abundant upon exposed parts—hands and
face; probably because these parts, being uncovered, permit freer and
quicker evaporation of the sweat excretion. Djoritch believes the
exudation of urea comes chiefly from the sebaceous glands. The skin
usually gives off a urinous odor.

Phosphoridrosis.—Instances of phosphoridrosis, or phosphorescent
sweat, are extremely rare. It has been observed in the later stages
of phthisis, in miliaria, and in those who have eaten of putrid fish. As
an example of the last cause may be mentioned the case recorded by
Panceri,² in which, after the eating of phosphorescent fish (putrid?),
which sickened the patient, the sweat was noted to be luminous in the
dark. Koster³ refers to a case in which the body linen became luminous
after violent sweating. Marsh⁴ refers to several instances of its occur­
rence in the last stages of phthisis, and to a case of a luminous extensive
ulcerating cancer of the breast. In all probability the phosphorescence
is due to photogenic bacilli; Beyerinck⁵ has discovered a number of
varieties, chiefly derived from fish.

URIDROSIS

Synonyms.—Urinidrosis; Sudor urinosus; Urinous sweat; Sandy sweat; Fr.,
Uridrose; Ger., Harnschweiss.

This term, as the word itself conveys, signifies sweat secretion con­
taining the elements of the urine, more particularly, however, urea.

The normal sweat² contains a minute quantity of this latter sub­
stance, but exceptionally cases have been observed in which the amount
was sufficiently large to be noticeable upon the skin. It is, however,
usually observed in connection with renal disease (Kaup and Jürgensen,
Leube, Deininger, and Taylor), generally preceded by partial or com­
plete suppression of the urine. It has also been noted in cholera (Schottin
and Drasche). According to Djoritch,³ it is always a grave prognostic

¹ Hyde, “A Contribution to the Study of Bleeding Stigmata,” Jour. Cutan. Dis.,
1897, p. 557, reports an interesting case and briefly reviews the subject and gives a
complete bibliography.

² See interesting paper by Easterbrook, “The Excretion of Urea by the Skin in
Health,” Scottish Med. and Surg. Jour., Feb., 1900, p. 120.

³ Djoritch, “Sueurs d‘ urée en géneral et dans la maladie de Bright en particulier,”
These de Paris, 1895.

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