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XXXIV. Second Appendix to a paper on the Variations of the Acidity of the Urine in 
the state of Health. 
By Henry Bence M.D.,M. A., Cantab. ,F.R.S.,Physicianto St. George' sHospital. 
Received June 6, — Read June 20, 1850. 
On the Influence of Tartrate of Ammonia and of Carbonate of Ammonia on the 
Acidity of the Urine. 
In a previous paper and appendix on the acidity of the urine, published in the 
Philosophical Transactions for 1849, I have shown the effect of different diets, of 
sulphuric acid, of tartaric acid, of caustic potash and of tartrate of potash on the 
acidity of the urine ; in this Appendix I purpose tracing the effect of tartrate of 
ammonia and of carbonate of ammonia. 
III. (e.) The effect of tartrate of potash having been so remarkable, it was thought, 
that by observing the effect of tartrate of ammonia, some conclusion might most 
rapidly and decidedly be obtained, as to the comparative effect of fixed and volatile 
alkalies on the acidity of the urine. 
Mr. Morson prepared for me some beautifully crystalline tartrate of ammonia: 
one portion was dried by pressure on blotting paper ; another portion was dried in 
a water bath. When dissolved in water no acid reaction was perceptible. 
(36.) The first day for comparison no tartrate of ammonia was taken. Breakfast 
at s'* 40“ A.M. Dinner at 6^ p.m. On mixed diet. 
h 
m 
Spec. gr. 
Acidity per 1000 grs. of urine. Appearance. 
Water passed at 
7 25 A.M. 
was thrown away. 
Water passed at 
8 
40 
1015-3 
+ 4-93 measures 
. Clear. 
Water passed at 
9 
45 
1021-7 
- 2-93 
Clear. 
Water passed at 10 
50 
1018-5 
- 7-85 
Clear. 
Water passed at 
1 
0 P.M. 
1025-8 
+ 10-72 
Thick from urates. 
Water passed at 
3 
25 
1024-2 
+ 19-52 
Thick from urates. 
Water passed at 
6 
0 
1023-5 
+ 26-38 
Clear. 
Water passed at 
8 
15 
1029-4 
+ 25-26 
Thick from urates. 
Water passed at 10 
15 
1031-7 
+ 15-50 
Thick from urates. 
Water passed at 
7 
1 0 A.M. 
1022-3 
+ 10-76 
Clear. 
(37.) For the following days tartrate of ammonia was taken. The first day two 
drachms of imperfectly dry tartrate of ammonia were taken, in two ounces of distilled 
water, at a few minutes after one o’clock p.m. 
Water passed at 8 35 a.m. 1025'1 + 1 3' 6 5 measures. Thick appearance from urates. 
Water passed at 10 5 1023-9 +1T72 Thick from urates. 
Water passed at 11 30 1027'2 — 7'78 Clear. 
