646 FUNCTIONS OF ANIMALS. 



When a person is fed on bread the quantity of solid urine 

 voided is less than when he is fed on eggs, and when he is fed 

 on eggs less than when fed on meal. The ratios are nearly 

 5:7: 9.* 



The quantity of solid matter in the urine is proportional to 

 that of azote in the food.f 



Ounces. Grains. 



Food, . 82 77 



Urine, . 56 64 



Difference, 26 13 



When the food is egg | ths of the azote of the food found in 

 the urine ; but \ |ths of the carbon is wanting, because it is given 

 off by the lungs. 



The person fed on one meal a day, generous and copious. 

 First experiment lasted 32 days ; second, 35 days. 



Mean urine rendered daily in 24 hours, dividing the day into 

 6 periods of 4 hours each : 



1st Series. 2d Series. 3d Series. 4th Series. 

 Mean urine. Mean urine. 



Solid. Solid. 



1st period, from 2 to 6 P. M., 55'3 gr. 61-4>gr. 107 | o q . H 



2d do. from 6 to 10 p. M., 88-7 102-8 J 



3d do. from 10 p. M. to 2 A. M., 107-9 218-9 ) O AQ 7 OK Q 



4th do. from 2 to 6 A. M., 85-6 106-3 } 



5th do. from 6 to 10 A. M., 100-1 77-2) on . o Q n o 



6th do. from 10 A.M. _to 2 p. M., 70-4 77-2 J 



Total, . 508- 643-8 617-0 100-0 



The quantity of food in the second series was greater ; the 

 kind the same. It is presumed that the food was taken just 

 before the beginning of the first period. 



The greatest quantity is from 8 to 12 hours after food ; the 

 least just after taking food. 



In the fourth series the food was much diminished and of infe- 

 rior quality. 



The secretion of solid urine is at a minimum the first two hours 

 after taking food, increases much the next two hours, and main- 

 tains nearly the same rate during the next four hours. 



When food was only taken once in 48 hours there was a feel- 

 ing of cold the second day. 



* Jour, de Phys. v. 84. f Ibid. p. 86. 



