COMPOSITION" OF LIME-SULPHUR ANIMAL DIPS. 



the solution naturally the greater will be the degree of hydrolysis 

 before equilibrium is reached. The free calcium hydroxid simulta- 

 neously produced reacts with the free sulphur or with polysulphur, 

 and is thus removed from the sphere of action, the whole series of 

 reactions therefore becoming irreversible. 



According to the above hypothesis there should be a slight decrease 

 of polysulphur and a slight increase of both monosulphur and thio- 

 sulphate sulphur during storage. This is not consistently true of the 

 concentrates of Experiment 1. On the contrary concentrates A to E, 

 inclusive, suffer a distinct though slight decrease in thiosulphate 

 figure. But the diluted solutions of samples C and E do give more 

 positive indications of the correctness of the above view, though 

 such slight differences can hardly be considered as of much signifi- 

 cance in either direction. In this connection it seemed well to try 

 the effect of the addition of calcium hydroxid to a dilute lime- 

 sulphur solution. 



Table 1. — Effect of storage upon analytical figures; concentrates diluted to 8 



volumes. 



Experiment 

 No. 



Sample 

 No. 



Formula: 

 CaO:S:H 2 0. 



Time 

 boiled. 



Storage 

 over 

 sedi- 

 ment. 



Storage 



de- 

 canted. 



Storage 

 diluted. 



Reac- 

 tion 

 figure. 



Thio- 

 sul- 

 phate 

 figure. 



Sul- 

 phid- 



acid 

 figure. 



Poly- 

 sulphur 

 figure. 



1 < 



1 



A-l 

 A-2 

 B-l 

 B-2 

 C-l 

 C-2 

 C-3 

 D-l 

 D-2 

 E-l 

 E-2 

 E-3 

 F-l 

 F-2 

 G-l 

 G-2 

 G-3 

 R-l 

 R-2 



\ 40:100:513 

 | 45:100:514 



I 47. 5:100:515 



| 50:100:516 



L 60:100:519 



| 45:100:514 



| 45:100:514 



Special. 

 Special. 

 Special. 



Hours. 

 1 



1 

 1 

 1 



1 



0.5 

 0.25 



Days. 



{ it 

 { I 



{ \ 



{ 



1 i 



{ I 



{ : 



Days. 

 

 

 



63 

 



61 

 

 



61 

 



62 

 

 



62 

 



33 



Days. 

 

 

 

 

 ' 

 

 74 

 

 

 

 

 94 

 

 

 

 



-0.30 

 -0.30 

 -0.35 

 -0.37 

 -0.66 

 -0.17 

 -0.97 

 + 0.03 

 -0.13 

 +0.06 

 -0.14 

 -0.73 

 -0.29 

 -0.15 

 +0.26 

 0.00 

 +3.34 

 -0.43 

 -0.01 



6.03 

 5.90 

 6.52 

 6.36 

 6.92 

 6,87 

 6.88 

 7.06 

 6.91 

 • 7.14 

 6.94 

 7.10 

 6.32 

 6.42 

 5.74 

 5.87 

 6.11 

 6.17 

 12.41 



21.08 

 21.28 

 23.69 

 23.71 

 25. 10 

 24.65 

 25.25 

 25. 95 

 25.94 

 24.81 

 25. 06 

 25.46 

 23.72 

 23.49 

 21.42 

 21.27 

 22.84 

 28.56 

 15.52 



40.62 



45.47 



44.37 

 43.83 



43. 61 



41.83 

 40.89 



45.78 



40.52 

 39.45 



2 J 







1 



49.09 



11 1 







30.92 





1 



1 





EFFECT OF LIME ADDED AFTER DILUTION. 



EXPERIMENT 2. 



To about 110 c. c. of sample G— 2, which had been stored 27 days after dilu- 

 tion, was added slaked lime equivalent to about 2 grams calcium oxid, and 

 the mixture was kept at room temperature in a filled and sealed bottle for 10 

 days. Each working day, except the last two, when it was left to settle, the 

 bottle was placed in a shaking machine for several hours. The results of analy- 

 sis are given in Table 1, under Experiment 2, sample G— 3. 



The changes in the analytical figures between samples G-2 and 

 G-3 are entirely consistent. But it is interesting to note the extreme 

 slowness with which calcium hydroxid reacts with calcium penta- 



