ON PRISON DIET AND DISCIPLINE, 63 



Weight of body. — The average weight of three of the prisoners during the 

 inquiry was greater than that recorded on the day preceding the conimence- 

 nient of the inquiry, but there was a loss of weight in the fourth. The aver- 

 age gain was, in the tailors, IS^ozs. and i7f ozs., and in one of the weavers 

 31 ozs., but in the other weaver there was a loss of 3|- ozs. The greatest gain 

 in the different cases was 1 lb. 13^ ozs. and ] lb. 7^ ozs. in the tailors, and 

 8f ozs. and 1 lb. 11 ozs. in the weavers; and the greatest loss 1^ oz. in one 

 tailor, 1 lb. 2^ ozs. and 4^ ozs. in the weavers. There was not an unvarying 

 progression in the weight during the week, but in every case there was an 

 increase from the Saturday to the Sunday, and the amounts were as follows : — 

 11-^ ozs. and 10^ ozs., 9| ozs. and 5 ozs. in the tailors; 6j0zs. and 18^ ozs., 

 IQiozs. and 31^ ozs. in the weavers; or an average increase of 13*62 ozs. 

 on the Sunday. 



Urine : quantity. — The largest quantities which were evolved in one day 

 were 25,321 grs. (56-6 ozs.) and 26,624 grs. (59-17 ozs.) in the tailors, and 

 27,791 grs. (62-3 ozs.) and 32,924 grs. (74 ozs.) in the weavers. The average 

 daily quantity was 41-2 ozs. in the tailors, and 47-51 ozs. in the weavers, 

 giving a total daily average of 44-35 ozs. There was a large increase on the 

 Saturday, and a marked decrease on the Sunday, as the following figured 

 prove : — 



Friday. Saturday. Sunday, 



ozs. ozs. ozs. 



Two tailors — 



„ ,, ...... 37'85 



Two weavers .... — 



49-5 



The average decrease from the Saturday to the Sunday was 10*29 ozs. 



Specific gravity. — The specific gravity of the urine varied from 1016 to 

 1027*5, but there was singular uniformity in the general results. In the 

 tailors it was 1023*7 and 1025, and in the weavers 1024*37 and 1024*6, 

 giving a total average of 1024*35 in the tailors, and 1024*45 in the weavers. 



Urea. — The analysis for urea was made by Liebig's method, from a test 

 solution which had been prepared in large quantity and used daily in other 

 experiments. The chloride of sodium was not removed, but its amount was 

 duly determined and deducted. 



The total average daily quantity of urea evolved was Q6S'Q5 %\^., of which 

 608*4 grs. Avere emitted by the tailors, and 702*9 grs. by the weavers ; the 

 maximum and minimum amounts were 790 and 456 grs., the former in the 

 weavers, and the latter in the tailors. In the weavers the quantity exceeded 

 700 grs. in 7 of 13 days, whilst this occurred only 3 times in the tailors, and 

 in only one instance during the inquiry was it below 500 grs. daily. 



The quantity of urea to each pound of body-weight was 4-812 grs. in the 

 tailors, and 4*675 grs. in the weavers ; but it varied in the former from 3-72 

 to 5*82 grs., and in the latter from 3*62 to 5-39 grs. on different days. 



The quantity of urea was always lessened on the Sunday. In the tailors 

 the diminution from the Saturday to the Sunday was 145 grs. and 122 grs., 

 and in the weavers 26 and 92 grs., giving a total average diminution of 

 96-25 grs. 



The quantity in each ounce of urine was, on the average, 14*9 grs. in the 

 tailors, and 15-25 grs. in the weavers, giving a total average of 15-075 grs. 

 The maximum and minimum quantities were 18-8 and 12*3 in the tailors, and 

 1784 and 13-53 in the weavers. 



Chloride of Sodium. — The average quantity of chloride of sodium evolved 



