OF THE URIC ACID IN THE URINE. 
247 
From these experiments it appears that the uric acid is increased three, four, or 
five times in quantity by food ; whilst the acidity is lessened to one-half what it was 
before food. The quantity of uric acid varies before food from 0’048 gr. per 1000 
grs. of urine, specific gravity 1026‘3, to 0T7 gr. per 1000 grs. of urine, specific 
gravity 1023T. After food the quantity of uric acid varies from 0’39 gr. per 1000 
grs. of urine, specific gravity 102 TO, to 0‘92gr. per 1000 grs. of urine, specific gravity 
103T1. The acidity before food varies from 23‘37 grs. per 1000 grs. of urine, specific 
gravity 10267j to 30'24 per 1000 urine, specific gravity 1024’9. After food the 
acidity varies from 7*80 per 1000 urine, specific gravity 1025‘1, to 26'21 per 1000 
urine, specific gravity 1030’0. 
The uric acid was lowest when 0’048gr. per 1000 grs. of urine, specific gravity 
1026‘3, was present, then the acidity was 27’28 measures. The uric acid was highest 
when there was 0*92 gr. per 1000 grs. of urine, specific gravity 103T1 ; the acidity 
then was IT 64 measures only. 
(6.) A child twenty-three months old, fed at 1 p.m. on bread with some meat and 
milk, gave — 
Acidity per 1000 grs. Uric acid per 1000 grs. 
of urine. of urine. 
Spec. gr. measures. grain. 
Water passed at 1 p.m. 1013’6 8'88 0‘27 
Water passed at 5 p.m. 1022’0 14’67 0 65 
Both specimens deposited uric acid crystals on standing; the first in twenty-four 
hours, the last in six hours. 
II. I next endeavoured to ascertain what was the influence of different kinds of 
food on the variations of the uric acid and acidity. 
For three successive days vegetable food alone was taken, with water and coffee. 
Breakfast at 9^ a.m. Dinner at 6^ p.m. 
( 7 .) 
( 8 .) 
( 9 .) 
Acidity per 1000 grs. 
Uric acid per 1000 grs, 
Water passed at 1|^ p.m. A few' 
1 Spec. gr. 
01 urine. 
measures. 
of urine, 
grain. 
uric acid crystals formed on 
>1022-9 
17-60 
0-19 
long standing 
Water passed at 6:^ p.m. clear . 
1025-4 
21-45 
0-17 
Water passed at 10^ p.m. clear . 
1014-8 
12-81 
0-19 
Breakfast and dinner as yesterday. Water at 10| a.m. thrown away, clear. 
Water passed at 2 ^ p.m. clear . 
1021-65 
8-89 
0-565 
Water passed at 6 ^ p.m. clear . 
1024-0 
26-36 
0-049 
Water passed at 10^ p.m. clear . 
1026-2 
3-29 
0-636 
Water passed at 6^ a.m. clear . 
1024-2 
19-52 
0-665 
Breakfast and dinner the same as 
yesterday. 
Water at 9 thrown away. 
Water passed at IO^a.m. thick on 1 
standing from urates . . .J 
1025-6 
12-67 
1-01 
2 K 2 
