1022 INFLUENCE OF FOOD PRESERVATIVES ON HEALTH. 



PRESENCE OF ALBUMIN AND REACTION OF THE URINE. 



A special comparison of the reaction of the urine and the presence 

 of albumin is made in this supplemental study, the results being 

 given in Table II. The acidity is expressed in quantities of tenth- 

 normal sodium hydroxid required to neutralize the acid of 100 cc of 

 urine. Nos. 3, 4, and 10, in this supplemental series are not the 

 same individuals as those so designated in Series VII. 



In the case of No. 3, it is noticed that the urine is decidedly more 

 acid in the preservative period than in the fore period and less acid 

 in the after period than in either of the other periods, as measured 

 by sodium hydroxid. The urine reacted acid four times and was 

 amphoteric four times in the fore period, as determined by litmus 

 paper. It reacted acid twelve times and was amphoteric twice in 

 the preservative period, determined in the same way. In the after 

 period the reaction with litmus paper is acid in every case. In 

 regard to the tests for albumin, three tests out of five are negative 

 in the fore period. In the preservative period reactions for albumin 

 are positive three times and negative four times. In the after period 

 the reaction for albumin is positive once and three times the tests 

 are negative. There is a slightly greater relative occurrence, there- 

 fore, of albumin in the preservative period than in either of the others. 



In the case of No. 4 the acidity of the urine as measured by sodium 

 hydroxid is greater in the preservative period than in the fore period. 

 The number of amphoteric reactions of the urine in the fore period 

 is greater than that of the acid reactions, and in the preservative 

 period the number is the same, while in the after period 7 tests give 

 an acid reaction, while only 1 gives an amphoteric reaction. Traces 

 of albumin are found at all observations in the urine of No. 4. 



In the case of No. 10 the acidity is greater in the fore period than 

 in either the preservative or after period. The reaction is acid in all 

 cases except two and uniformly acid during the preservative period. 

 Albumin is found at every test during all periods of the observation. 

 The summary for Nos. 3,4, and 10 show the average acidity meas- 

 ured by sodium hydroxid to be 42.9 in the fore period, 44.3 in the 

 preservative period, and 34.6 in the after period. The average num- 

 ber of acid reactions in the fore period is. 12, in the preservative 

 period 34, and in the after period 21, while the number of amphoteric 

 reactions is 10 in the fore period, 9 in the preservative period, and 2 

 in the after period. Albumin occurs in 10 tests out of 13 in the 

 fore period, in 16 out of 20 in the preservative period, and in 11 out 

 of 14 in the after period. These data indicate a very slight tendency 

 on the part of the preservative to increase the number of albumin 

 reactions in the urine. 



