COMPOSITION OF LIME-SULPHUE ANIMAL DIPS. 3 
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 < 
A-l 
A-2 
B-l 
B-2 
C-l 
C-2 
C-3 
D-I 
D-2 
E-l 
E-2 
E-3 
F-l 
E-2 
G-l 
G-2 
G-3 
R-l 
R-2 
} 40:100:513 
} 45:100:514 
147.5:100:515 
| 50:100:516 
I 60:100:519 
| 45:100:514 
| 45:100:514 
Special. 
Special. 
Special. 
Hours. 
1 
1 
1 
1 
1 
0.5 
0.25 
Days. 
{ A 
{ I 
1 ! 
{ i 
{ ! 
{ 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 
""46." 62 
""45." 47 
""44.' 37 
43.83 
o 1 
43.61 
"'41.' 83 
40.89 
"*45." 78 
""46." 52 
39. 45 
2- 
49.09 
11 
30.92 
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 tilled 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- 
