352 



Dr. Parkes — Further Experiments on the [Mar. 2, 



that the urea did not fall as was expected, though its percentage was les- 

 sened. 



Liebig's mercuric nitrate solution (the chloride of sodium being got rid 

 of and the usual correction for dilution being made) and Voit's plan for 

 the determination of nitrogen by soda-lime were both used, so as to afford 

 a control of the observations. 



The daily weight of the body, the temperature of the axilla and rectum, 

 the pulse, the weight of the stools, &c. were also determined. Almost all 

 the experiments were repeated, and several were performed three and four 

 times*. 



During the first ten days he remained in bed from 10 p.m. to 10 a.m., 

 taking during the day his ordinary exercise. During the second 10 days 

 he went to bed at 10 p.m. as before, got up at 6 a.m., worked for two hours, 

 and then went to bed again at 8 a.m. until 10 a.m. The work consisted 

 in dragging a cart weighing 710 lb. 4 miles in two hours. Supposing the 

 coefficient of traction to be the same as in walking, the amount of work cal- 

 culated by Haughton's formula would be equal to about 100 tons lifted 

 one foot. His weight at the commencement of the experiment was 1461b. 

 2 oz. ; it fell regularly during 10 days to 144 lb. 10 oz., viz. 1 lb. 8 oz. 

 During the second 10 days it fell to 142 lb. 12 oz., a loss of 1 lb. 14 oz. 



The following are the mean results in the first and second sections of 10 

 days. 



Mean amount of urine, in cub. centims. 





6 A.M. 



to 



8 A.M. 



8 A.M. 



to 



IO A.M. 



IO A.M. 



to 



6 A.M. 



Total. 



2nd section of io days 



71-65 



75 -6 



100*4 

 85-8 



1077-45 



1068-8 



i249'5 

 1229-4 



There was a slight decrease in the urinary water in the two hours of rest 

 following the two hours' exercise. 



Mean amount in grammes of mercuric nitrate precipitate taken as urea. 





6 to 8. 



8 to 10. 



10 to 6. 



Total. 



1st section of io days, \ 



3-056 



2*902 



35-189 



41-147 



2nd section of 10 days, "1 

 2 hours additional > 

 exercise from 6 to 8 J 



3-142 



2-974 



36-017 



42-133 



* Count Wollowicz commenced these experiments with me, but was obliged to dis- 

 continue them on account of the illness which eventually proved fatal. Serjeant Tur- 

 ner, of the Army Hospital Corps, very carefully took most of the observations on the 

 temperature and the pulse. 



t One day's urea from 6 to 10 a.m. is omitted as the urine was lost. 



