Lime-Sulfur 57 



Third, the sulfite takes up oxygen forming 

 calcium sulfate, 



CaSOa + = CaS04, 



so that calcium sulfate and sulfur are the 

 final products of decomposition of the lime- 

 sulfur mixture. 



The analysis of a commercial lime-sulfur 

 concentrate is as follows: 



Sp.gr., 1.30 or 33.7 B^. 



Sulfur in thiosulfate, 0.25% 



Sulfur in tetrasulfid, 0.50% 



Sulfur in pentasulfid, 24.75% 



Total sulfur, 25.50% 



This shows that the amount of thiosulfate 

 has been greatly reduced, and that the sub- 

 stance present in greatest quantity is cal- 

 cium pentasulfid. 



QUESTIONS 

 (To be answerd in the notebook.) 



1. Did you have sufficient lime-sulfur solution to 

 float the hydrometer spindle? What was the Beaume 

 reading of your solution? 



2. How many pounds of sulfur in one gallon of your 

 solution? 



3. How much would the suKur in 50 gallons cost 

 at the rate of $20.00 per ton? 



4. What dilution did you make for the Sian Jose, 

 scale? What was the density of the dilute solution? 



