NOTE ON A BLUE URINE- 
149 
the urine of patients subjected to the hydrosudopathic treat- 
ment ; two affected with syphilis, and an old Dane who had 
obstructions of the abdominal viscera. One of the two sy- 
philitic patients had been submitted to mercurial treatment; 
the other had not taken mercury. In all three cases, the 
blue sediments were observed in the period of cure. 
The same physician has observed, besides, sediments of 
the same color in the urinary of the establishment of Pries- 
nitz. 
To return to the urine in question: the following are the 
peculiarities observed in it by M. Bouchardat:-— 
1. It exhaled a powerful ammoniacal odor; its taste was 
saline; it had a deep blue color; it deposited a sediment of 
a fine blue. 
2. Examined with the microscope, the sediment seemed 
to be formed of globules of excessive tenuity, of great regu- 
larity of form (which was ovoid) and of dimensions, ^vhich 
may be estimated at about one-third of those of the globules 
of human blood. 
S. This urine returned the blue color of litmus paper 
reddened by an acid. 
4. Reagents detected in it the presence of phosphates, 
sulphates, chlorides of lime, magnesia and ammonia. . 
5. The blue coloring matter partly dissolved in ether, to 
which it imparted a blue color; the ethereal liquids being 
evaporated, furnished a very slight residue of a fixed oil of 
a repulsive odor. 
6. Alcohol partly dissolved, by aid of boiling, the color- 
ing matter, and left a residue of a deeper color. 
7. Nitric acid destroyed the coloring matter, and fur- 
nished a straw-colored liquor. 
S. Sulphuric acid, diluted with twice its weight of water, 
did not cause any change. 
9. The Solution of oxalic acid dissolved the coloring mat- 
ter, and a blue liquor was obtained, which, when filtered, 
was very limpid. 
