OF THE SULPHATES IN THE URINE. 
253 
(1.) Breakfast on bread and cocoa at 8| a.m. Dinner on meat, potatoes, bread 
and water at p.m. 
Sulphate of baryta per 
1000 grs. of urine. 
Spec. gr. grains. 
Water passed at 3 p.m. filtered 1028‘2 9' 16 
Water passed at 6^ clear 1027*0 8*41 
Water passed at 10^ filtered 1033*9 15*23 
(2.) Food as before. Between 3 and 7 p-m. strong exercise was taken. Dinner at 7 p.m. 
Water passed at 7 p-m. clear 
1025-3 
7*07 
Water passed at 1 1 filtered 
1030*8 
11*53 
Water passed at 1 a.m. clear 
1025*1 
6*47 
(3.) Breakfast at 9 a.m. as before. Dinner at 6^ p.m. 
Water passed at 3^ p.m. filtered 
1026*8 
7*96 
Water passed at 6^ clear 
1027*0 
7*36 
Water passed at 10^ 
1031*0 
10*63 
(4.) Breakfast at 9 a.m. as before. Water passed at 10 a.m. thrown 
away. Dinner 
6^ P.M. 
Water passed at 12|^p.m. filtered 
1025*6 
7*52 
Water passed at 3^ 
1025*9 
7*95 
Water passed at 6:^ 
1026*0 
8.25 
Water passed at 10^ clear 
1029*3 
9*45 
(5.) Breakfast at 9 a.m. as before. Dinner at 5^ p.m. 
Water passed at 1 p.m. clear 
1024*0 
6*48 
Water passed at 3|^ 
1023*6 
6*03 
Water passed at 5| 
1027*6 
8*56 
Water passed at 9^ filtered 
1030*8 
12*43 
Average mean of five days after dinner, with perfect rest 
1031*1 
11*85 
Average mean of five days just before dinner, after exercise 
1026*5 
7*93 
Average of four days, longer before dinner 
1026*1 
7*77 
From these experiments it appears that the sulphuric acid is much increased in the 
water passed after food, the quantity varying — 
From 15*23 grs. of sulphate of baryta per 1000 grs. of urine, specific gravity 1033*9 
To 9*49 grs. of sulphate of baryta per 1000 grs. of urine, specific gravity 1029*3 
The mean of all the experiments after food being 11*85 per 1000 urine, specific 
gravity 1031*1. 
The quantity of sulphuric acid is much less in the water secreted a long time after 
food, varying — 
From 8*56 grs. of sulphate of baryta per 1000 grs. of urine, specific gravity 1027*6 
To 7*07 grs. of sulphate of baryta per 1000 grs. of urine, specific gravity 1025*3 
The mean of all the experiments before food being 7*93 grs. per 1000 grs. of urine, 
specific gravity 1026*5. 
2 L 
MDCCCXLIX. 
