404 
DR. BENCE JONES ON THE OXIDATION OF 
Experiments with Tartrate of Ammonia. 
(18.) Breakfast and dinner were at the same hours as before. 
Water passed from a.m. to 11^, in quantity 8 ounces, gave slight evidence of 
nitric acid by the starch test, none by the indigo. 
At 1 1^ A.M. tartrate of ammonia, 60 grs., were taken in 4 ounces of distilled water. 
At 3 p.M. 7 ounces of urine gave evidence of nitric acid by the indigo, iron, and 
starch tests. 
At 6 p.M. 7 ounces gave nitric acid with the starch test, but not with the indigo. 
At 12*' 30"* A.M. 10 ounces. Starch test gave evidence of nitric acid. 
At 8** 15"* A.M. 18 ounces. No evidence of nitric acid by either test. 
(19.) Another day. Water at 6*' 45*" a.m. thrown away. 
At 1 1*' 45"* A.M. about 8 ounces. Still gave a trace of nitric acid by the starch test. 
At this hour 40 grs. of tartrate of ammonia were taken in distilled water. 
At 6** 20"* p.M. 1 1 ounces of urine gave evidence of nitric acid with the starch test. 
At 12** 15*" p.M. 7 ounces. Nitric acid much more evidentlv. 
At 7 A.M. 14 ounces. Still distinctly evident. 
Up to 7^ 30*" A.M. the following morning, 54 ounces of water passed contained no 
trace of nitric acid. 
(20.) A child, seven years old, took 20 grs. of tartrate of ammonia in some tea at 
8 A.M. Urine secreted from this time to 6 a.m. the following day, in quantity 18 ounces, 
gave no trace of nitric acid. 
As small quantities of nitric acid were detected in two of these experiments pre- 
vious to the time when the tartrate of ammonia was taken, though the quantity of 
nitric acid was much increased afterwards, yet further experiments were made. An- 
other healthy person took the same amount of tartrate of ammonia. 
(21.) The urine made before the ammonia was taken contained no nitric acid. 
At 12 A.M. 40 grs. of tartrate of ammonia were taken dissolved in 6 ounces of distilled 
water. 
At 3 p.M. the urine was acid and contained a trace of nitric acid, by the starch test. 
Up to 9 A.M., the following morning, the urine was collected, concentrated and 
distilled, but not the slightest trace of nitric acid was detected. 
(22.) The experiment was repeated at 1 p.m. : 60 grs. of tartrate of ammonia were 
taken dissolved in 9 ounces of water. In three quarters of an hour it acted on the 
bowels. The water passed prior to the dose, in quantity 8^ ounces, was examined 
for nitric acid, but not a trace could be detected. 
At 4** 15*" urine highly acid, 6| ounces. It gave a large quantity of nitric acid. 
At 1 1 P.M. 6 ounces. Nitric acid found most readily. 
At 8 A.M. nitric acid was not detected. 
At 2** 45*" P.M. 7 ounces. A considerable quantity of nitric acid was detected. 
At 12 P.M. gave a trace of nitric acid. 
