790 
DE. SMITH ON THE ELIMINATION 
Table XX. — Sho^ving the Hourly Rate of Excretion of Urea and Urinary Water before 
midday under the influence of various fluids, but (with two exceptions) without food. 
Urea. 
1860. 
January. 
February. 
23. 
24. 
25. 
26. 
28. 
30. 
27. 
20, 
22 . 
Ilour. 
Waters oz., 
at 9 A.M. 
Water 8 oz., 
bread 3 oz., 
at 9 A.M. 
Cofiee ( J oz.), 
8 oz., 
at S| A.M. 
Tea (100 grs.), 
8 oz., 
at 9 A.M. 
Black dose 
2 oz., water 
6 oz., 
at 84 A.M. 
Water 8 oz., 
at 9 A.M. 
Water 8 oz., 
at 8^- 
Waters oz., 
at8-J, 9i,10iA.M. 
Gluten 
bread 2 oz., 
water 8 oz., 
at 9, 10,11 A.M. 
grs. 
grs. 
grs. 
grs. 
grs. 
grs. 
grs. 
grs. 
grs. 
81 
12-2 
12-4 
21 
9 
17-66 
14-7 
25-3 
15-2 
19-8 
13 
11-7 
18-5 
91 
15-8 
28-64 
10 
30-5 
17-6 
19-3 
24-6 
21-8 
22-7 
19-5 
loy 
23-7 
28-1 
11 
24-9 
26-6 
19-2 
24-24 
23-7 
20-16 
25-4 
28-8 
12 
24 
30 
15*3 
17 
15-8 
20*4 
18*7 
28 
36-9 
Urinary Water. 
fluid oz. 
fluid oz. 
fluid oz. 
fluid oz. 
fluid oz. 
fluid oz. 
fluid oz. 
fluid oz. 
fluid oz. 
81 
•76 
•9 
2-5 
9 
2 
1-4 
•3 
•8 
1-6 
3-1 
-9 
1-7 
1-9 
12-25 
10 
9-25 
2 
2-35 
3-5 
2-35 
5-2 
1-9 
101 
5-4 
21-5 
11 
8-3 
6-65 
1-8 
3-6 
2-7 
11-2 
3-1 
111 
16-5 
12 
8-5 
10-13 
1-65 
2-25 
1-8 
8-5 
3-26 
7 
12-6 
Maximum increase per cent, over the basis quantity. 
Urea 
76 
104 
58 
59 
75 
65 
102 
35 
100 
Water 
341 
621 
200 
350 
200 
260 
500 
760 
640 
The maximum emission of urea in these several experiments varied from 22’7 to 
36'9 grs. per hour; but no just comparison can be made, unless we accept the basis 
quantity as the standard in each experiment. If this be accepted, we And a striking 
difierence in the effects of the several substances. 
The greatest increase always occurred when water was the fluid employed. In these 
experiments v/ith water the increase in the rate of elimination of urea exceeded 100 per 
cent., whilst in two others with water it was 65 and 76 per cent., and in one was so low 
as 35 per cent. The effect of tea and coffee was precisely the same, and but little more 
than half that of water, wRilst with black dose there was still an increase of 75 per 
cent. The addition of a little common bread and of gluten bread did not lessen the 
effect of the water, but it deferred the period of maximum elimination to the end of the 
inquiry ; and in this respect these experiments stand alone. The largest elimination of 
urea followed the use of the gluten bread. The maximum effect of coffee is stated in 
