HOMEMADE LIME-SULPHUR CONCENTRATE. 



any of the solution is taken out in order to get an even distribution 

 of the sludge. The foHowing data were obtained, which show the 

 variation in density of the different batches. Four batches in which 

 the 50-100-50 formula was used tested 25°, 26°, 28°, and 29° Baume, 

 respectively. Seven batches in which the 55-110-50 formula was used 

 tested 28°, 29°, 29°, 30°, 30°, 30°, and 31° Baume, respectively. It 

 will be noted that there was considerable variation in degrees Baum6 

 for the different batches, although each was cooked as nearly as possi- 

 ble in the same way. 



Similar variations in density were observed at a steam-cooking 

 plant at Chewsville, Md. 



EXPERIMENTS AT HAGERSTOWN, MD. 



A new lime-sulphui' cooking plant at Hagerstown, Md., was visited. 

 The cooking vessels, two in number, consisted of the hulls of two large 

 boilers standing on end. Each held about 1,500 gallons. The cook- 

 ing is done by steam. A few experiments were conducted at this 

 plant to determine, if possible, what formula should be used under 

 these conditions of manm^acture to obtain a highly concentrated 

 solution. The results of these trials are given in Table 11. 



Table II. — Results of cooking different lots of lime and sulphur in preparation of lime- 

 sulphur wash, Hagerstown, Md., 1912. 



Ex peri- 



Formula. 



Percentage 

 in volume 

 of sludge 

 (estimate). 



Degrees 



meat No. 



Lime. 



Sulphur. 



Water. 



Baumd. 



1 

 2 

 3 



4 



Pounds. 

 800 

 800 

 750 



200 

 1,000 



Pounds. 

 1,600 

 1,600 

 1,500 



400 

 2,000 



Gallons. 



800 

 800 



2S5 pallons sludge, 715 gallons water 



Added to above 1,000 gallons of 23° 

 Baum6 material 



35.0 

 35.0 

 40.0 



45.0 

 45.0 



25.5 

 26.0 

 23.0 



27.0 



5 



280 gallons sludge, 620 gallons water 



32.5 



In Experiments 1 and 2 800 gallons of solution were cooked at a 

 time. The 50-100-50 formula was used in each of the two experi- 

 ments with a result of 25.5° and 26° Baume test solution respec- 

 tively. In each case there was about 35 per cent m volume of sludge. 

 The solution in Experiment 1 was allowed to remain in the vessel 

 24 hours, tlicn the clear solution was drawn off and 285 gallons of 

 sludge remained in the tank. In order to see what effect this sludge 

 would have on the soluticni by cooking it over with the next batch | 

 (Experiment 3), 715 gallons of water were added to it, making 1,000 ' 

 gaUons in all; 750 pounds of lime and 1,500 pounds of sulpliur wore 

 added to this and tin", mixture was cooked foi- one liour. After 

 allowing the solution to scrttlc, 24 liours tlie clear lifjuid tested 23° 

 Baume and tliere was 40 \h'V cent in volume of sludge. An attempt 

 wiw made to raise the test of this solution (Experiment 4) l)y adding 



