786 
DE. SMITH ON THE ELIMINATION 
an increase of 0 to 2 '45 fluid ounces over the whole day rate of the same day. Of these, 
forty-seven were the days on which the basis quantity of urea also exceeded the whole 
day rate, as is observed in Table XII. Many of the exceptions were quite insigni 
ficant, so that in ten instances the excess only involved the second place of decimals ; 
but in ten others it exceeded I oz. per hour. The large number of instances in which 
the basis quantity, both of urea and urinary water, was excessive, proves the relationship 
which exists between them, and their mutual dependence upon a common cause ; but 
in 34 per cent, of the days on which the basis quantity of urea was exceptional, there 
was no exception in the rate of excretion of urinary water at the same period. Hence 
the estimate already given of the value of the basis determination of urea is nearly 
equally applicable to the excretion of urinary water. Both vary greatly, and chiefly in 
relation to the amount of urinary water evolved on the preceding day. 
The relative position of the rate of urinary excretion before midday was unbroken in 
eveiy month and week of the year. On three days in the year the rate was less than 
the whole day rate by the second place in decimals only. There were two exceptions 
only in reference to the basis quantity, viz. a defect of T5 and *57 fluid ounce in May 
and June. The rate of excretion varied greatly, and on one occasion exceeded an average 
of 13 fluid ounces per hour. 
Table XVI. exhibits the variations of the hourly rate in the excretion of urine during 
the hours of the afternoon. All the flgures show that there was a progressive increase 
in the quantity through the morning hours, and until two to six o’clock in the evening, 
and afterwards a progressive decrease until the night period. There were, however, 
variations in the quantity which are deserving of notice. 
Table XVI. — Showing the Hourly Bate of Excretion of Urine at various 
periods of the day, in fluid ounces. 
I860. 
A.M. 
P.M. 
Hours. 
9 
10 
11 
12 
1 
2 
3 
4 
5 
6 
7 
8 
9 
10 
11 
12 
Night. 
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. 
fl.oz. 
fl.oz. 
fl. oz. 
February 14. 
•6 
41 
617 
6-25 
1-85 
1-2 
•97 
15. 
•9 
1-36 
616 
1-85 
. . . • 
1-68 
•88 
16. 
13 
3 
12-6 
308 
2-48 
109 
17. 
2-48 
2-72 
2-66 
2-55 
1-71 
101 
! 18. 
1-8 
43 
6-23 
1-75 
1-62 
114 
i 23. 
11 
8 
7-73 
5 
1-75 
1-33 
3-3 
•88 
1 24. 
1-36 
1-3 
1-24 
51 
3-84 
1-91 
1-24 
1 
112 
. . . 
6-'4 
3-9 
2-47 
1-6 
•86 
27. 
2 5 
5-76 
10-4 
11-4 
8-4 
24 
201 
305 
1-33 
The circumstances especially worthy of note in connexion with this Table are tlie 
variations in the maximum rate, the diflerent hours in the middle part of the day when 
it occurred, the great diversity of elimination in successive hours, and the large rate of 
excretion at midnight on three occasions, compared with the preceding night rate on tire 
same day, or with hours immediately preceding on other days. February 17 was an 
exceptional day, since I was not well, and beef-tea only was taken at dinner. On the 
