of Magnesia in Calculous Complaints. 14,1 
On the 30th of January, he took twenty grains of magnesia, 
and repeated it every night and morning, until the 1st of 
March, when his urine was perfectly healthy, and he left it 
off. 
On the 1st of June, he again voided a little uric acid, in the 
form of red crystalline sand : this attack was attended with a 
slight pain along the right ureter. He returned to the use of 
the magnesia, which he took twice a day for three weeks, in 
the same dose as before, and from that time to the middle of 
November, there had been no symptoms of a return of the 
complaint. 
CASE IV. 
A gentleman, aged fifty six, after recovering from a severe 
fit of the gout, voided constantly a large quantity of mucus in 
his urine, a symptom which he had never before noticed. 
There was also, occasionally, abundance of red sand, consist- 
ing principally of uric acid, but he had never voided a calculus. 
His stomach was uncommonly weak, he was often affected 
with heartburn, and an almost constant pain in the neighbour- 
hood of the right kidney. He had been in the habit of taking 
tincture of bark, and other spirituous medicines, from a 
belief, that the pain in his right side arose from gout in the 
.stomach. 
He had already attempted to use the alkalies, which had 
produced such unpleasant sensations in the stomach, that he 
could not be prevailed upon to try them again in any form. 
Under these circumstances, he readily acceded to a new 
plan of treatment. He was directed to omit the use of spi- 
rituous medicines, and take twenty grains of magnesia, three 
