766 
DE. SMITH ON THE ELIMINATION 
to IMarcli 18, 1862, the daily quantity was 480 grs. ; so that the average daily quantity 
on the two years was 500 grs.] 
Table II. — Showing the proportionate number of days on which various quantities 
of urea were evolved during the year. 
Grains per day. 
Per cent, of the whole. 
200 to 300 
•038 
300 to 400 
3-87 
400 to 500 
46 
500 to 600 
39 
600 to 700 
9*1 
700 to 800 
2-1 
Thus the daily emission of urea was between 400 and 500 grs. in nearly half of the 
whole period of inquhy, and in only 15 per cent, of the whole were the quantities below 
400 and above 600 grs. 
The average weekly amount of urea was in no instance below 400 grs., and in only 
one instance did it exceed 7 00 grains per day. The quantity in this larger average was 
between 100 and 500 grs. per day in 49 per cent., and between 500 and 600 grs. per 
day in 38 '3 per cent, of the whole number of weeks. 
The monthly averages varied from 451 to 665 grs. ; but in 47T per cent, the quantity 
was between 400 and 500 grs., and in 38'4 per cent, between 500 and 600 grs. daily. 
Hence the most frequent amount of urea evolved was between 400 and 500 grs. daily, 
and the usual range extended from 400 to 600 grs. ; but as only a few experiments were 
made at the period of the year when the daily evolution was commonly over 600 grains, 
it is probable that the true frequency of the higher rates is somewhat understated. 
The folio whig Table exhibits the average quantity of the urea, urine, and faeces which 
were emitted daily, and the amount of the fluid and solid ingesta, on the average of the 
weeks and months of the year. The thick line introduced into this and some other 
Tables implies that the part following has been added since the reading of the paper. 
