292 STRONG AND CROWELL. 



guards continually watched the gate. Toward one end of the 

 quadrangle formed by the walls of the bartolinas a stone cell 

 house is situated, consisting of five rooms (see Plate II), each 

 with a separate entrance. The walls of the five cells are of 

 stone, the floors of cement. Ventilation is obtained through 

 iron-barred windows and through the roof, and in the day time 

 through the doorway. In each prison cell, besides the beds, 

 constructed of an iron frame covered with canvas, was a porce- 

 lain flush water-closet with running water and a large recep- 

 tacle kept locked containing distilled water for drinking purposes. 

 (See Plate III.) A shower bath was situated in the courtyard. 

 The rooms were always kept scrupulously clean and the hygienic 

 arrangements were excellent. Each group of the subjects of 

 the experiments was assigned to one of these rooms of the cell 

 house and was locked in it at night. In the morning each 

 prison cell was unlocked and during the day all the subjects of 

 the experiments in one bartolina were allowed to mingle freely 

 with one another, except at meal times. During the meal time 

 the different groups ate in separate rooms under the observation 

 of one of us or occasionally under the observation of the Amer- 

 ican guard, so that it was quite impossible for any interchange 

 of food between the different groups to occur. At the close of 

 the meal each man turned in his pail containing the amount of 

 food uneaten and a record of the amount was entered in the 

 notes. None of the prisoners was allowed to retain any of the 

 uneaten food except in one or two instances noted under 

 the histories of each individual case. The conditions of the 

 isolation of the men as is obvious were such as to preclude the 

 possibility of any other food reaching them in any way or at any 

 time. Groups I, II, and III were confined in Bartolina A and 

 Group IV in Bartolina B. 



THE DIET EMPLOYED IN THE EXPERIMENTS. 



The food used was weighed for each meal and cooked outside 

 of the prison in a special kitchen by a special cook, in a clean 

 manner, and under very careful supervision. After cooking it 

 was divided into equal parts according to the number to be fed. 

 At first it was divided by weight, but it soon became possible to 

 estimate sufficiently accurately the division into equal parts. 

 Each man's food was put into a special dinner pail marked with 

 his number and so served to him. A record was taken at the 

 close of each meal of the amount eaten by each man; it was 



