173 



The results are gathered together in the following 

 tables : — 



Table I. 

 Deposit in Flue leading from Salt-Gake furnace to Con- 

 densing Toiuer. 



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 f^er cent. 



This Flue had been working for some years. 



Table II. 



Coke. 

 From Condensing Toivers. 



Ai'senic Trioxide 

 per cent. 



Mean of 3 Analyses =. 2*886 



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 Trioxide Arsenic Trioxide Ai-senic Trioxide 



per 1,000 cubic feet. per hour. per day. 



grains. grains. grains.' 



0158 5012 115-134 



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 atmopheric mois- 

 ture into Arsenious and Hydrochloric Acid. - 

 (2Ascl3+3H20 = AsA4-6Hcl). 



