OF THE ACIDITY OF THE URINE. 
237 
Water passed at 
h 
m 
Spec. gr. 
Acidity per 1000 grs. of urine. Appearances. 
11 
20 A.M. 
= 1024-9 
— 12-68 measures. 
Clear. 
Water passed at 
12 
20 p.M. ' 
j- =1029-2 
-14-57 1 
Thick from phosphates 
Water passed at 
12 
45 J 
Clear. 
Water passed at 
3 
15 
= 1028-4 
+ 13-61 
Clear. 
Water passed at 
5 
45 
= 1026-6 
+22-40 
Clear. 
Water passed at 
9 
= 1032-9 
+ 13-55 
Thick from urates. 
Water passed at 
11 
10 
= 1030-4 
+ 3-88 
Clear. 
Water passed at 
2 
30 A.M. 
= 1011-4 
+ 5-93 
Clear. 
Water passed at 
7 30 
= 1020-6 
+ 11*75 
Clear. 
(3.) Breakfast 
at 8^ 45“' A.M., the same 
as the day previous 
. Dinner at 5'’ 5™ p.m. 
Water passed at 
8 
45 
= 1024-8 
+ 19-51 measures. 
Thick urates. 
Water passed at 
9 
50 
= 1020-6 
+ 12-73 
Clear. 
Water passed at 
10 
50 
= 1021-8 
+ 1-95 
Clear. 
Water passed at 
12 
50 p.M. 
= 1027-2 
- 1-94 
Clear. 
Water passed at 
2 
50 
= 1024-7 
+ 10-73 
Clear. 
Water passed at 
5 
5 
= 1024-9 
+ 18-53 
Clear. 
Water passed at 
7 
35 
= 1029-2 
+ 15-54 
Thick from urates. 
Water passed at 
10 
5 
= 1027-2 
- 7-78 
Clear. 
Water passed at 
2 
15 A.M. 
= 1022-0 
+ 8-80 
Clear. 
Water passed at 
6 
45 
= 1024-6 
+ 16-59 
Clear. 
Water passed at 
7 
45 
= 1024-8 
+20-49 
Thick from urates. 
Water passed at 
8 
45 
= 1022-5 
+ 13-69 
Clear. 
From these experiments, which lasted three days, it appears that before each meal 
the urine showed the highest degree of acidity ; and the water passed two or tliree 
hours after food always showed a lower degree of acidity than that made before food. 
The decrease continued until three hours after breakfast, and five or six hours after 
dinner, when it reached the lowest point. The acidity of the urine then increased 
until just before food, when it again reached the highest limit. 
Tims, when breakfast was taken at half-past eight, the acidity of 1000 grains of 
the urine then passed was sufficient to neutralize about one grain of dry and pure 
carbonate of soda. At twelve o’clock the urine was as alkaline as if every 1000 grains 
of urine contained two and a half grains of carbonate of soda. At half-past five, just 
before dinner, the acidity had increased, so that every 1000 grains of urine was so 
acid as to require two grains of carbonate of soda to neutralize it. At half-past ten 
the acidity had diminished, so that every 1000 grains of urine was as alkaline as if 
they contained half a grain of carbonate of soda. After this it probably became more 
alkaline, and then still longer after food became acid ; and by half-past eight in the 
morning, each 1000 grains of urine required about a grain and one-third of carbonate 
of soda to neutralize the acid reaction. 
The same changes were observed on each of the two following days. These varia- 
MDCCCXLIX. 2 I 
