36 Fisher — The Effect of Diet on Endarance. 



E. (March) " Working power improved. Can concentrate atten- 

 tion for a lonsjer time." 

 (June) " I accomplished a greater amount of mental woi'k than 

 in previous years during the corresponding period of the col- 

 lege year. I do not think that my feeling of fitness for it 

 was any greater, however, and I cannot say that my experi- 

 ence of fatigue after the work was any less. I learned to eat 

 slower than liad been my custom dui'ing previous years. 

 Though not subject to indigestion, I experienced less stomach 

 disorders during the period of the experiment." 



Lq. (March) " I have put in more long hours during this term 

 than any previous term, consequently have had a good deal 

 less sleep. I do not know that I can work any better, except 

 that I can work a longer period at one time without feeling so 

 tired from it." 

 (June) " Of course a great deal of the extra Avork was outside 

 work which was an extra tax. I, however, did a great deal 

 more work on papers that I i:)repared than I ever had before. 

 Although I spent longer hours than before I did not 

 feel the effect of the work so much as before." 



Lw. (March) " Have been working harder during the past four 

 months and have taken less exercise than at any other equal 

 period during past 2|^ years. The character of the work has 

 been so different that I am unable to say whether there is an}"" 

 increase in working power, but I find that I rest up very 

 quickly after becoming tired (mentally). 



" When March tests were taken I did not feel as 'fit' for test 

 on that particular day as at time of January tests. Had been 

 ' working hard and had been under nervous strain, which un- 

 doubtedly affected the tests." 

 (June) " I have Avorked harder from January to June than ever 

 'before, and have taken less exercise. As my mental work Avas 

 so different from that previous, I cannot form an estimate of 

 any increase or decrease in efficiency, but as I have said 

 before, I always rested up inore quickly." 



M. (March) ''I think on the whole a slight improvement." 

 (June) " Do not notice any change." 



P. (March) " I have never Avorked so steadily, or with so little 

 necessity to exercise the Avill to Avork, as in the central six 

 Aveeks of the test. The Avork I was doing was chieflA' research 

 in the Library, poring for three or four hours at a time over 

 old records — not labor of the most interesting kind." 



