on the Effects of Magnesia: 353 
“served, that whenever the citric acid was omitted, even for 
twenty-four hours, the sediment was greatly increased, and 
‘this was constantly attended with frequent desire to make 
water, and other symptoms of irritation in the bladder. 
‘On resuming the use of the citric acid, the sediment. al- 
ways disappeared, and the irritation of the bladder subsided, 
‘and this happened so frequently, that no doubt could be 
‘entertained of the iofluence of the medicine on the com- 
position of the ufine. 
~ This plan of treatment was continued for three months ; 
“at the end of that period, it was found that the urine had 
not the same disposition to deposit the phosphates as. for- 
merly; even when the medicine was omitted, the sediment 
‘was small in quantity, and not constant in its appearance. 
He was now directed to omit the uze of the citric acid, and 
occasionally to eat oranges and other acid fruits... He con- 
tinued this plan until the beginning of April 1813; his unne 
was then quite clear, and be had no symptoms of disease. 
Case 3. In the month of October 1811, a gentleman, 
thirty-four years of age, informed me, that he had observed 
a white deposit in his urine, during the whole of the pre- 
ceding summer. He had taken considerable quantities of 
soda water, which he thought increased the sediment, and 
alkalies in any other form produced a very obyious aggrava- 
tion of the complaint. é 
His urine was at all times clear when voided; but after 2 
few hours, a white powder was observed to separate from 
it, and a film of crystalline matter formed upon. the surface. 
The former consisted of phosphate of lime and mucus, the 
latter of the ammoniaco-magnesian phosphate. 
He was directed to take one drachm of muriatic acid 
“properly diluted, at divided doses, during the day.; and it 
“was proposed that he should pursue this plan for a weeks 
but it was discontinued on the third day on account of its 
acting upon thé bowels, and producing a frequent desire to 
make water*. , ‘ ; 
~~ On the 10th of October, he was advised to take two large 
lasses of lemonade daily, and to substitute claret for port 
Wine, a pint of which he was in the habit of drinking daily. 
Under this treatment the symptoms produced by the mu- 
tiatic acid subsided; but the appearance of the urine was 
hot at first improved. 
- On the 20th, the film of triple phosphate formerly con- 
_ * In this and other instances the sulphuric and nitric acids were occa- 
ovate substituted for the muriatic; but they were found equally inad- 
missible. 
“Vol, 42, No. 187, Nov. 1813. Z stantly 
