550 



Mr. A. W. Blyth. 



[Apr. 11, 



At the end of the first period, during which the insufficient quantity 

 of 16 ozs. was taken, there was a loss in weight of 7 Ibs., the breath- 

 ing capacity seemed a little increased, but the tests showed no other 

 marked deviation from the above. During the second period, in 

 which the meal was increased to 20 ozs., there was a farther loss of 

 3 Ibs. During the third period, when 28 ozs. were taken, this loss of 

 weight ceased and a slight gain was recorded. 



During the whole twenty-eight days, A suffered, according to his 

 own account, but trifling inconvenience : the bodily functions were 

 regularly performed, the mental capacity unaltered ; there was a 

 marked absence of indigestion, the sleep was sound, and there was no 

 deterioration of muscular power. On the other hand there was 

 a marked decrease of sexual power as well as desire. The appearance 

 of A during and at the end of the experiment was not that of perfect 

 health. The features were pinched ; there was slight anaemia. 



The measurements and tests as determined in Mr. Francis Galton's 

 laboratory were as follows : 



Analysis of Income and, Output. 



The whole meal was analysed by ordinary methods, the nitrogen 

 being determined by Kjeldahl's process, the fat in a Soxhle't's appa- 

 ratus by exhaustion with petroleum ether. The faeces were passed into 

 strong redistilled ' methyl alcohol, dried, powdered and treated simi- 



* Eeaction time for sound and sight in hundredths of a second. 



