Gul

November 10: "Believe I am mentally keener than when on full diet. I can study for an examination to better advantage now." February 2: "Have noticed no difficulty or detriment to my mental work while on the diet. In the two years previous I have had a great deal of difficulty in keeping awake in classes, particularly after dinner and breakfast. This year I have not dozed off in a class any time during the experiment; absolutely no inclination to sleep during class lectures. In this way the diet has made me more efficient in my college work." February 8: "I feel 'logy'; it is hard for me to keep awake in class now that I am eating uncontrolled. This morning I was sound asleep in both classes; on the other hand, I have noticed that I do not sleep well at night; I wake up earlier and do not want to".

Kon

February 2: "The chief inconvenience of the experiment has been the weakness and of course the hunger." February 8: "I can now study to better advantage, inasmuch as I do not have the feelings of weakness and the distracting desire for food".

Moy

January 26: "During the week I have had no desire whatever to study; the condition is partly due, no doubt, to the realization that the experiment is about to end." February 2: "The inconvenience of the experiment consists largely in the time required, the getting up early in the morning, which necessitated earlier retiring, and also the time at week-ends for coming down to Boston for the Laboratory experiments there. My studying has been just about the same as last year but I think it has required more will power to stick to it." February 8: "Since the experiment I have been able to work as well as, I would not say better, than when on diet, but at least I can study later, i. e., until 12 o'clock, without weariness. Of course it is not necessary for me to rise so early now. During the experiment when I was hungry I found it most satisfactory to run the typewriter or do some such work rather than try to study. It seemed to me that I could do as much on Sunday afternoon after the uncontrolled meal as I could do in all the rest of the week." May 21: "Looking back over the experiment, it seems that perhaps the men were more or less 'scouting' for trouble when they were on the diet. They were noticing many subjective feelings that at other times would receive but very slight, if any, attention. However, the feeling of weakness or faintness was so prominent and so frequently present that there is no doubting its connection with the experiment. There was also a change in mental attitude. As I told you during that period, I was said by some to be the most crabbed man in school, and since the experiment ended many have remarked that I acted more like myself. I realize that during the experiment I was more critical and irritable and more ready to pick other people to pieces, and since the uncontrolled eating I have felt different toward my associates. Since I have as much or more work to do now than I did during the diet experiment, I can not believe that it was just the details of the experiment that produced this condition, but think it must have been the reduction in food that caused the increase in irritability. The physical weakness might also act in this way. During the experiment there were several times at the dining-hall when some amusing incidents happened, but they did not appeal to us as being particularly funny, as they would do now; we seemed to have a different and more serious mental attitude. I cared nothing at all for going to shows, which now and before the diet were very attractive to me".

Pea

November 24: "The first three days of this week I could not study." December 8: "Not much ambition for study." January 12: "I have no ambition to sit and study; do not feel nearly so good as when I was eating full diet during the Christmas vacation." February 8: "Wednesday morning I went to sleep in class after the Tuesday evening banquet at Peckham's; I have not noticed any particular change in my studies yet." May 22: While the men would stand a good deal of 'kidding' among themselves, from their squad associates, they were more easily irritated, I think; some of them were judged by outside men to be very crabbed indeed. For example, some of the freshmen who entered college this fall, and had never known the men before, judged their dispositions on the basis of what they found them to be during the experiment; since the experiment has ended some of them have remarked at the considerable change they have found in us and expressed surprise at their previous misjudgment".

Can

November 10: "Thinks his mind may be somewhat clearer than when eating uncontrolled." December 19: Felt good for the most part of this week; studied hard and long last night (until 12 o'clock); feels better than on any previous visit to Boston. February 2: "I think that in general the experiment has caused some decline in efficiency in studying; aside from this and the physical weakness the chief thing noted was the inconvenience of the experiment and the feeling of restraint of having always to stop and consider whether I can do this or that; then there was the trouble of collection of urine and feces." February 8: "I find that I can keep awake, study better, and pay better attention in class than I could on the diet; I have headache and a tired feeling in my eyes as during the experiment." May 22: "Your insistence that the talk about crabbedness is just a joke is wrong. Perhaps crabbedness is not the right word; I know of no better one to express it. The men were certainly more easily irritated during the period of the diet. Things which now appear to be small and insignificant were at that time exceedingly irritating and caused us to complain, particularly in reference to the amount of the food at the table. Our irritability was a subject of common remark among our outside friends; there were individual differences naturally; some of the men were easier to get on with than others. I think a good deal depended upon the scientific interest that the individual had in the experiment and his trying to look at the matter objectively. I believe you would have much more difficulty in trying to conduct the experiment with a group of men who had no scientific interest in the problem and whose enthusiasm for research was not aroused. I am under the impression that my mind was a little clearer for purposes of work during the diet period, but it was not supported by the endurance on the physical side which made long, continuous study possible".