794 
DE. SMITH ON THE ELIMINATION 
Table XXIII. — Showing the average excretion of Urea on 191 selected days in the year. 
Average 
all 
days. 
Sunday. 
Monday. 
Tuesday. 
Wednesday. 
Thursday. 
Friday. 
Saturday. 
1860. 
gl'S. 
grs. 
gl-3. 
grs. 
grs. 
grs. 
grs. 
grs. 
March 
462 
580-7 
462 
455 
460 
404 
375 
384 
April 
489 
521 
467 
458 
463 
• • • 
493 
509 
May 
546-5 
589-4 
562 
534- 
528 
505 
473 
558 
June 
541 
555-4 
487 
543 
539 
527 
467 
405 
July 
August 
September ... 
505 
646 
665 
547-7 
628 
739-3 
496 
499 
505 
494 
479 
497 
October 
518 
621 
534 
546 
533 
492 
471 
592 
November ... 
455 
485 
444 
415 
421 
457 
513 
418 
December ... 
1861. 
451-6 
471 
476 
454 
432 
456 
412 
444 
January 
475 
475 
488 
433 
479 
519 
510 
475 
February ... 
515-2 
492 
525 
468 
470 
515 
515 
499 
March 
471-9 
471-8 
473 
437 
467 
560 
441 
497 
Thus the average daily emission of urea on all these selected days combined was 
475'5 grs., giving an increase on the Sundays of 57'9 grs. daily. The increase chiefly 
occurred before January 1861 ; and during the winter months of 1861 there was but 
little variation on Sundays and other days. The causes of exceptional conditions 
were very few in January, February, and March 1861 ; and nearly all the days in those 
months have been included in the selection. 
The largest daily emissions of urea which occurred during the year fell relatively more 
frequently on Sundays than on the whole year, to the following extent : — 
Daily excretion, 700 to 800 grs. 600 to 700 grs. 500 to 600 grs. 
3-4 per cent. 13T per cent. Equal. 
I have sought to ascertain if this periodical day of increase, or the causes which occa- 
sioned it, were influential in any defined order in the other days of the week ; and the 
following Table shows that there is a progressive decline in the rate of emission of urea 
as the week advances to the Saturday, on the average of the 191 selected days and the 
Sundays just referred to. 
Table XXIII., and Plate XXXII. fig. 7, show the average amount of urea excreted 
on each day in the week, and on the average of the year ; the daily excretion was as 
follows to the end of December 1860 : — 
Sunday. Monday. Tuesday. Wednesday. Thursday. Friday. Saturday. 
Urea, grs. ... 574 491 488 485 476 460 475 ‘ 
The loss from the Monday to the Saturday was 31 grs., and it was greater proportion- 
ately on the Thursday and Friday than on the earlier days in the week. There was an 
increase on the Saturday ; and, in explanation, I may state that Friday is my last Hospital 
day, when I take only coffee and bread and butter for lunch, and dine at a later horn*, 
and on Saturday I have commonly more rest than on other working days. 
