368 REPORT OF THE CHEMIST OF THE 
TABLE V.— SHOWING RELATIVE DISTRIBUTION OF SULPHUR COMPOUNDS 
IN SOLUTION AND SEDIMENT. 







Percentage 
Percentage of|Percentage of|Percentage of of total 
No. of Formula total dissolved dissolved sulphur 
experi- sulphur sulphur sulphur in form of 
ment. used present | in form of in form of combined 
Sulphur. Lime. | in solution. sulphides. | thiosulphate. sulphur 
in sediment. 
Lbs. Lbs. Penick. ECE ACh. SAAR Per ct. 
l-a 125 52 87.8 (alas 16.13 0.4 
se) = 4 81.5 OCv2 14.3 0.9 
1c M m 81.4 74.4 120 5.0 
2-a | 125 60 91.7 80.2 11.5 4.0 
oa a . 91 2 84.0 ioe 4.7 
2c 4 My 90.2 84.0 GE 6.1 
3a 125 65 92.0 ae 1 so 0.8 
oa . 96.0. 91.5 4.5 5.8 
3-C us iB 95.9 90.6 aie! 8.1 


In the third column, we give the number of pounds of sul- 
phur in solution for every 100 pounds of sulphur used; in the 
next column, we give the proportion of the 100 pounds of sul- 
phur used which is in solution as sulphide sulphur; and, in the 
next column, the proportion appearing as thiosulphate sulphur. 
In the last column, we give the proportion of the total sulphur 
used which appears in the sediment as combined sulphur (sul- 
phite and sulphate). To illustrate, we find in experiment 1-a 
that, for 100 pounds of sulphur used, 87.8 pounds go into solu- 
tion; this amount being made up of 71.5 pounds of sulphide 
sulphur and 16.3 pounds of thiosulphate sulphur; while the 
amount of combined sulphur present in the sediment is 0.4 
pound. 
We find, in general, that with the use of increased amounts 
of lime, larger proportions of the sulphur used go into solution 
and apparently smaller proportions of thiosulphate sulphur. 
As presented in Tables IV and V the data indicates, in 
general, that when the amount of thiosulphate sulphur de- 
creases in the solution, the amount of sulphite sulphur in the 
sediment increases. Unless this fact is considered, the natural 
inference in examining the data is that when greater amounts 
of lime are used, smaller amounts of thiosulphate sulphur are 
formed, and that, therefore, just so much more sulphur ap- 
