or UEEA AiND UEINAET WATEE. 
783 
to the ingestion of an unusually small quantity of fluid at the breakfast, and to my 
having taken 18 oz. of strong beef-fea without solid food at 1| p.m. The flrst cause 
lessened the morning excretion, whilst the second increased the emission at the hours 
indicated ; and on both of these grounds, and from my being unwell in the afternoon, 
the day was exceptional. 
I now proceed to describe the results of the observations made at each hour of the 
day, and at every quarter of an hour during limited periods. 
Most observers have found that the emission of urinary water is increased nearly 
one-third in the second or third hours after a meal ; but others, as Chambeet, found no 
increase, and Bexeke met with great diversity in his results. 
All persons have, however, noticed an increase in the elimination of urea after a meal ; 
but there is a diversity of statement as to the commencement and the duration of the 
increase. Leiimaxx and others found it to commence during the flrst hour, and to 
attain its maximum in the third hour ; but V oit, in his experiments upon dogs, sometimes 
observed the maximum so late as the seventh, and traces of the increase remained 
throughout nearly a whole day. 
On March 1 and 2, 1861, 1 made hourly observations from 8 or 9 a.m. until midnight. 
The only variation from the ordinary food was, that the dinner on March 2 was unusually 
large, and black pudding and coflee were taken so late as 10^ p.m. The following Table 
contains the results of the inquiries (Plate XXXIV. fig. 1). 
Table XIII. — Showing the Hourly Excretion of Urea and Urinary Water, and 
the periods of Meals. 
1861. 
A.M. 
P.M. 
Breakfast. 
Dinner. 
Tea. 
Supper. 
9 
10 
11 
12 
1 
2 
3 
4 
5 
6 
7 
8 
9 
10 
11 
12 
Night. 
grs. 
STS- 
grs. 
grs. 
grs. 
STS. 
Srs. 
srs. 
srs. 
srs. 
?rs. 
srs. 
grs. 
grs. 
grs. 
grs. 
grs. 
Urea, Mar. 1... 
23 
177 
203 
297 
23 
15-4 
16-8 
13 8 
20-4 
22-8 
227 
25 
167 
191 
20-6 
15-68 
Urea, Mar. 2... 
10-6 
20-6 
31-4 
25-8 
28 
26 
24-3 
17-8 
207 
17-6 
25 
28-4 
29-2 
239 
20-2 
19-5 
fl.oz. 
fl.oz. 
fl.oz. 
fl.oz. 
fl.oz. 
fl.oz. 
fl.oz. 
fl.oz. 
fl.oz. 
fl.oz. 
fl.oz. 
fl.oz. 
fl.oz.lfl.oz. 
fl.oz. 
fl.oz. 
fl. oz. 
Water, Jlar. 1 
4 5 3 94 
32 
9 
512 
1-8 
1-6 
1-28 
1-97 
1-55 
2 
276 
1-82 
1-6 
1-47 
1 
Water, Mar. 2 
1 03 
205 
7 5 
41 
IM 
5 05 
3-35 
1‘75 
1-45 
M5 
1-95 
2-0 
2-87 
2-23 
1-33 
1-44 
On December 17 and 18, 1860, I determined the rate of excretion at each quarter of 
an hour, from 9^ a.m. to 1.45 p.m. on the former, and from 1 p.m. to 3|-p.m. on the latter 
day. I did not venture to pass urine so frequently as each quarter of an hour throughout 
the whole day without intermission, on account of the influence which I believe it to 
have of increasing the secretion of urine and of causing an unusual state of excitement 
at the neck of the bladder. Breakfast was taken on the first day from 9.20 to 9.37 a.m., 
and dinner commenced at 1.52 p.m. ; whilst on the second day coflee, with bread and 
butter, was taken from 1.20 to 1.30 p.m. The following Table exhibits the results of 
these inquiries. 
