520 



INFLUENCE OF FOOD PKESEKVATIVES ON HEALTH. 



TABLE V. Summary for nine men, by periods, showing average daily ratio of food weight 



to body weight, Series VI. 



[Averages are per man per day.] 



MICROSCOPICAL EXAMINATION OF THE BLOOD. 



The blood was examined at stated intervals for corpuscles and hem- 

 oglobin, according to the methods described in the borax report. 

 Two independent estimates were made by Messrs. B. J. Howard and 

 C. P. Knight, and the average taken as the correct expression for the 

 count, with the results shown in Table VI. 



In the case of No. 1 there was a diminution in the number of red 

 corpuscles and an increase in the number of white corpuscles during 

 the administration of the preservative. After the withdrawal of the 

 preservative the red corpuscles again increased in number and the 



