380 REPORT OF THE CHEMIST OF THE 
of sulphur in various forms before and after adding magnesium 
oxide. The data are based on 50 gallons of diluted mixture. 
TABLE XIJ.— Errect or AppIngc MAGNESIUM OXIDE TO LIME-SULPHUR 

SOLUTION. 
Sulphur Percentage 
in solution. of total sulphur. 
Total |————————_-| Sul-  |———_——__————_—__"— 
Condition sul- phur 
of phur In In in In In In form 
mixture. in form form sedi- form form of 
mixture. of of thio-} ment. of of thio-| free 
sul- sul- sul- sul- sul- 
phides. | phates. phides. | phates.} phur. 
Lbs. Lbs. Lbs. Lbs. 
Untreated a: 4c rth ons LOFLDS 9.70 0.45 0 95.6 4.4 0 
"DEBAGOG eae pie ee LOWES 8.65 1.05 0.45 85.2 10.3 4.5 
The results show that under the conditions of the experi- 
ment, the addition of magnesium oxide to the diluted lime- 
sulphur wash decreased the amount of sulphide sulphur and 
increased the amounts of thiosulphate and free sulphur. 
COMMERCIAL LIME-SULPHUR PREPARATIONS. 
The samples of liquid commercial preparations were col- 
lected under the direction of Hon. Raymond A. Pearson, Com- 
missioner of Agriculture. The special brands thus collected, 
which form the basis of our work, are the following: (1) 
“ Rex,” 3 samples; (2) “ Grasselli,” 3 samples; (8) “ Niagara,” 
4 samples (4) ‘“ Thomsen,’ 2 samples. In addition to these, © 
we have recently had placed in our hands a dry powder called 
“ Never-Scale,” which we will consider by itself. 
GENERAL CHARACTER AND VALUE OF COMMERCIAL PREPARATIONS. 
The various preparations were essentially alike in color, all 
being reddish-golden or orange-red when seen in a quart glass 
fruit-jar and deep claret when viewed in larger masses. Only 
