480 INFLUENCE OF FOOD PEESEKVATIVES ON HEALTH. 



time necessary to the regular inspection of the physical state of the 

 young men under observation, and this inspection was undertaken by 

 the Chief of the Bureau. A thorough physical and medical examina- 

 tion was given to each applicant before his admission to the table, in 

 order to be certain that those admitted to the experimental work were 

 in a perfectly sound physical state and for at least one year previous 

 to the beginning of the experimental work had not suffered from 

 any severe illness. In this respect the same means were employed 

 and the same care exercised as in the experiment with borax, the 

 squad having been chosen, thoroughly examined as described, and 

 placed upon the permanent diet for about a week before the regular 

 period of observation began, on October 19, 1903. 



The main experiment on salicylic acid is 'referred to as Series VI, 

 following Series V of Part I on boric acid, while Series XI is a sup- 

 plemental, special study conducted at a later date to determine certain 

 effects on the urine, the importance of which had been suggested by 

 the work of Series VI. It will be noted from the schedules following 

 that the work of Series VI began on October 19, 1903, and was com- 

 pleted on December 7, a period of fifty days, excluding the preparatory 

 work, which began about October 15. Series XI consisted of a pre- 

 liminary study of three men from March 29, 1905, to April 9, and a 

 special study of four men from April 27 to May 16, a total of thirty- 

 two days under observation. 



