AND INSENSIBLE PERSPIRATION. 307 



quantity of food taken daily was 91 ounces; 

 there remains a balance 374 oz. to be accounted 

 for, which must have been spent by the insensi- 

 ble perspiration from the skin, and that from the 

 lungs conjointly, on the supposition that the 

 weight of the body remained stationary. 



I have already observed that the daily evacua- 

 tions were not so nearly uniform as was the 

 quantity of food. The urinary secretion was 

 greatest when tea was substituted for milk, and 

 on one day was 15 oz. above par. On another 

 occasion finding a greater defalcation than I had 

 before observed, I could discover no cause for 

 it, unless a tea-spoonful or two of vinegar taken 

 at dinner could account for it. To be satisfied 

 of this, I took, some days after, an ounce of 

 vinegar in four equal portions during one day; 

 and the effect was a greater diminution of urine 

 on that day than on any other during the two 

 weeks, the quantity being 15 oz. below the average, 

 and 4 oz. less than on the former day when 

 vinegar had been taken. There did not appear to 

 be any increased effect in any other secretion as 

 a compensation for this diminution. 



In order to try the effects of different seasons 

 I resumed these investigations in the month of 

 2q2 



