of Magnesia in Calculous Complaints. 
CASE II. 
1 39 
A gentleman, about 40 years of age, had during four years 
occasionally voided considerable quantities of uric acid, in the 
form of red sand, and had once passed a small calculus. 
His urine was generally, more or less turbid, and after 
taking any thing which disagreed with his stomach, even in a 
slight degree, the red sand often made its appearance. He 
had never used the alkalies nor any other medicine, to alleviate 
his disorder, he was consequently desired to take a drachm 
and a half of subcarbonate of soda, dissolved in a pint and a 
half of water highly impregnated with carbonic acid, in the 
course of the day, and to persevere in this treatment for some 
time. 
On the 30th of January 1809, he left London, and returned 
on the 6th of March following. 
During his absence he had voided rather less uric acid than 
usual, but had had one severe attack, in consequence of which, 
twenty drops of the solution of pure potash were added to 
each dose of the soda water ; this, however, had not the de- 
sired effect, for on the 10th of March, having taken more 
wine than usual on the preceding day, he was attacked with 
pain in the right kidney, and voided with his urine a con- 
siderable quantity of uric acid, in the form of minute red 
crystals. During the succeeding day, he made but little 
water, which deposited a copious sediment of red sand. 
For the removal of this symptom, he w r as directed to take 
magnesia, in the dose of twenty grains every night and morn- 
ing, in a little w'ater ; for three successive days his bowels 
were unusually relaxed, but afterwards became regular. He 
T 2 
