214 PRINCIPLES OF ANIMAL NUTRITION. 
- Respiratory Quotient. 
Animal, Food. aoe 
; Before | During After 
Work. Work. Work. 
Rabbit ..|Ad libitum..... 0.0... 7 0.880 | 0.970 | 0.799 
Dog ....|Fasting from 1 to 7 days. 5 | 0.776 | 0.849 | 0.733 
Dog ....|Abundantly fed with Talle porridge. 2 | 1.016 | 1.027 | 1.033 
in the increments of carbon dioxide and oxygen over the rest values 
quotients much greater than unity and reaching in one case 3.5 (?). 
Speck * likewise found an increase in the respiratory quotient as 
the result of work. Although he observed numerous exceptions, 
he regards it as the rule that it increases with the severity of the 
work. _ 
On the other hand, Katzenstein,} in experiments on men, found 
in some cases no considerable increase in the respiratory quotient 
during work. He gives the following average results, of which 
those in the first table do not relate to exactly the same subjects 
in the three cases: 
Turning Ergostat. 
RePOSC: «5% vieae eaten eee Se Renee ee wes 0.754 
Light work. ............ cee eee e eee eee ees 0.824 
Heavy work. ....... 22. cc. cee eee eee eee ee) 0.823 
Walking. 
Subject Subject Subject Subject 
No. 1. No. 2. No. 3.4 No. 4. 
Repose ..........22 0c eee e ee eee 0.801 0.73 0.77 0.75 
Horizontal locomotion .......... 0.805 0.77 0.82 0.895 
Locomotion up hill............. 0.799 0.79 0.865 0.86 
In all cases, the determinations of the respiratory exchange 
covered only a few minutes soon after the work began, and 
* Arch. klin. Med., 45, 461. 
t Arch. ges. Physiol., 49, 330. 
$ A very corpulent individual, 
