1871.] 



Effect of Diet fyc. on Elimination of Nitrogen. 



359 



During the day of exercise, however, the observations at 10 a.m. and 

 2 p.m. on the pulse and all the temperature observations on the marching 

 day were lost, except at 8 a.m. and 8 p.m. 



On a diet without nitrogen. 

 Mean pulse. 





Hours. 



Mean 





8 A.M. 



IO A.M. 



12 NOON. 



2 P.M. 



4 P.M. 



6 P.M. 



8 P.M. 



of day. 



ist 5 days ... 



64-4 



69-6 



69-2 



73'6 



70-2 



75-8 



72*6 



7077 



2nd 5 days... 



68 



70-25 



75-2 



75 



74 



75-6 



72-6 



72-95 



Mean temperature of axilla. 





Hours. 



Mean 





6 A.M. 



8 A.M. 



IO A.M. 



12 NOON. 



2 P.M. 



4 P.M. 



6 P.M. 



8 P.M. 



by day. 



ist 5 days ... 



98-08 



98-16 



98-36 



98-36 



98-32 



98-32 



98-36 



98-36 



98-29 



2nd 5 days... 





98-08 



98-15 



98-25 



98-2 



98-15 



98-5 



98-15 



98-16 



Mean temperature of rectum. 





Hours. 



Mean 

 of day. 



8 A.M. 



IO A.M. 



12 NOON. 



2 P.M. 



4 P.M. 



6 P.M. 



8 P.M. 



ist 5 days ... 

 2nd 5 days... 



99'° 

 98-7 





99-2 

 99-04 





.99'4 

 99-24 





99*4 

 99-48 



99-25 

 99-"5 



The mean pulse on the 5th day of the 1st series of non-nitrogenous food 

 was 69'3, and 67*9 on the 5th day of the 2nd series. Both these were 

 rest days, when the heart would naturally beat rather less. Non-nitro- 

 genous diet does not, therefore, materially affect the number of beats of the 

 pulse ; but it decidedly influenced its volume, rendering it smaller, far 

 softer, and more compressible when felt with the finger, and it gave a feeble 

 sphygmographic tracing. 



The sphygmographic tracings show this clearly. Ten tracings were 

 taken at 6 a.m. on successive days, when the man was on nitrogenous food, 

 1 5 hours after dinner and 1 2 after the last food. They represent, therefore, 

 the tracings of inanition. Five tracings were taken on successive days at 

 6 a.m. on the non-nitrogenous food. The same instrument and an equal 

 pressure were always used. The height to which the lever was raised 

 (all conditions of pressure &c. being equal) will therefore show the expan- 

 sion of the artery. The tracings were carefully measured, and the following 

 is the result: — 



