SULPHUROUS ACID AND SULPHITES. 869 



EPITHELIUM CELLS. 



These forms are found in many instances during the whole period 

 of observation. In the case of No. 1 a few are found in the fore 

 period, the first part of the preservative period, and the after period, 

 and very few during the second and third parts of the preservative 

 period. In the case of No. 2 a few are found in the fore period, and 

 they are fairly numerous in the other periods. In the case of No. 3 

 a very few are found in the fore period, a few in the first and second 

 parts of the preservative period and in the after period, and very few 

 in the last part of the preservative period. In the case of No. 4 a 

 very few are found in the fore period, the first part of the preserva- 

 tive period, and the last part of the after period, and a few at all 

 other tests. In the. case of No. 5 a few are found in the first and 

 second parts of the preservative period and in the after period, and a 

 very few in the third part of the preservative period. In the case of 

 No. 6 a few are found at all observations. No. 7 shows a very few 

 in the fore period and a few in the first and second parts of the pre- 

 servative period. No. 8 exhibits a very few cells in the fore period, 

 in the last part of the preservative period, and in the after period. 

 No. 9 shows a few cells in the fore period, the first and second parts 

 of the preservative period, and a very few at all other observations. 

 No. 10 shows a very few cells in the fore period, a few during the 

 whole of the preservative period and in the first part of the after 

 period, and very few in the latter part of the after period. No. 11 

 shows a very few cells at all tests, except in the latter part of the after 

 period when a few are found. No. 12 exhibits a few cells in the fore 

 period and in the first part of the preservative period, and a very few 

 at the other observations. 



The figures expressing the relative occurrence show a notable 

 increase during the period in which the preservative was adminis- 

 tered, and a slight decrease in the after period as compared with the 

 preservative period. 



LEUCOCYTES. 



These occur regularly through all the periods of observation. They 

 are especially evident in the case of No. 12. In the case of No. 1 a 

 very few are found in all the periods, except at the second test in 

 the preservative period, when they disappear. In the case of No. 2 a 

 few are found in the fore period and the second and third parts of 

 the preservative period, a very few in the first part of the preserva- 

 tive period and the last part of the after period, and none in the 

 first part. In the case of No. 3 a very few cells are found in all 

 the periods, and the same is true of Nos. 4, 8, 10, and 11. In the 

 case of No. 5 a very few cells are found in the first part of the pre- 

 servative period, a few in the second and third parts and in the last 



