or TJHEA AND UEINAEY WATEE, 
809 
The average of all the observations gives the following results. On Sundays the 
elimination was to the extent of 494 grs., on days of comparative rest 512 grs., and on 
treadwheel days 528 grs. The increase on the days of tread wheel labour over that of 
merely routine labour was 16 grs. per day. The prisoner No. 1041, to whose exceptional 
returns I have before alluded, had no average increase with treadwheel labour, but, on 
the contrary, there was an average decrease of 51 grs., and the increase was carried on 
to the following day. The three other cases exhibited an increase of 37 grs., 59 grs., 
and 21 grs. daily, or an average of the three of 42 grs. daily with labour. 
None of the cases were without an exception in the relative influence of treadwheel 
and mere routine labour’; but one had two, another had three, and two had four 
exceptional days on which there was no increase on the treadwheel days. These 
instances are marked in the Table with an asterisk. When there was no increase on 
the treadwheel days, there was an increase on the following day of rest; and this 
irregularity alternated several times in succession. 
The cause of these exceptions is not clear ; but I am fully convinced that it is not 
due to any error, nor to any change in the dietary or the habits of the men. There 
were, however, two noticeable meteorological conditions at the periods when the marked 
variations occurred. Thus, from March 6 to March 11 the temperature fell from 40° to 
30°’9, when the exceptions in No. 1040 occurred, and rose considerably on the day on 
which the exceptions ended, and at the same period the barometer rose very greatly, and 
remained at above 30 inches until the day before the exceptions terminated. These 
would exert a mutually opposing influence. The contrary conditions occurred on the 
exceptional days in case No. 1041 ; for the temperature rose from 30°’9 to 46°’5 from 
March 11 to March 20, when the exceptions ended; and the barometer having fallen 
to 29’5T0 inches on the day when the exceptions began, reached 30’012 inches on the 
day on which they terminated. There is thus at least a singular coincidence in the 
existence of these disturbing causes and a succession of exceptional results ; and on each 
occasion the usual effect of the treadwheel labour over the elimination of urea was 
retarded one day. 
The largest increase from the treadwheel labour was 144 grains, and the largest 
decrease was 100 grs. of urea per day. 
The following Table contains the percentage results of this inquiry. 
Table XXXV. 
The whole period. 
To March 17, before 
extra food was given. 
Average increase from treadwheel over routine labour, in all cases 
combined 
1 per cent. 
I " 
per cent. 
3-4 
Average increase from treadwheel in the three most regular cases... 
Average increase from treadwheel over Sundays (all combined) ... 
Average increase from treadwheel over Sundays, three most regular 
cases 
7*4 
6-4 
} 
4-7 
Average increase in the cases Nos. 948, 838, and 1040 
7, 11, and 3-7 
} 
7'9, 3, 2 
Average increase on days of routine labour over the treadwheel 
days, exceptional case No. 1041 
Average increase on treadwheel days, No. 1041 
1*5 
Maximum increase from treadwheel over routine labour 
26 
20 
Maximum decrease from treadwheel over routine labour 
19 
19 
