173 
The results are gathered together in the following 
tables : — 
Table I. 
Deposit in Flue leading from Salt-Cake f urnace to Con- 
densing Toiver. 
Arsenic Trioxide 
per cent. 
Mean of 9 Analyses = 43'434 
The total numbers in this case were found to agree very 
closely, varying only from 39 per cent to 47.7 per cent. 
This F] ue had been working for some years. 
Table II. 
Coke. 
From Condensing Toiver s. 
Arsenic Trioxide 
per cent. 
Mean of 3 Analyses = 2 ’8 8 6 
In this case 10 lbs. of coke was used for each analysis, 
and was digested well, first with distilled water and then 
with pure Hydrochloric Acid. The towers had been in use 
for about a year. 
Table III. 
Air in Flue. 
Leading from Condensing Toiver to Chimney. 
Amount of air taken for each analysis = 500 cubic feet, 
Amount of air passing = 31,722 cubic feet per hour. 
The mean of 12 analyses is here given. 
Arsenic Trioxido Arsenic Trioxide Arsenic Trioxide 
per 1,000 cubic feet. per hour. per day. 
grains. grains. grains. 
0158 5 012 115T34 
The arsenic will probably escape either as Arsenious 
Acid or as Arsenic Trichloride. If as the latter, it may be 
decomposed on coming in contact with the atmoplieric mois- 
ture into Arsenious and Hydrochloric Acid. 
(2Ascl 3 -f 3 H 2 0 =As 2 03 + GHcl). 
