CONTROL OF DECAY IN PULP AND PULP WOOD 43 
Table 13. — Preservative treatment Oj pulps — Continued 
Preservative J 
Pounds 
of 
chemical 
per ton 
oven-dry 
pulp 
Effect of chemical on 
pulp 
Months 
in 
storage 
Condition at time of 
inspection 
Sodium sulphocarbolate. 
Do 
Sodium and potassium tar- 
trate, c. p. 
Sodium thiosulphate (hypo)._ 
Sumach extract 
Thymol.... 
Do 
Do. 
Do. 
Do. 
Thymol oil No. 2 », w 
Do. 6 ," 
Thymol oil No. 3«, 18 . 
Thymol 
Zinc chloride 
Do 
Zinc silicofluoride. 
Do 
Do. 
Do. 
Do. 
Zinc sulphate, c. p. . . 
Zinc sulphocarbolate. 
Do 
56.4 
114.1 
218.5 
192.4 
0.2 
0.4 
0.9 A 
0.9 
1.9 A 
18.5 A 
37.0 A 
37.0 A 
0.9 S 
108.6 
105.8 S 
32.9 
57.7 
80.0 
53.5 S 
104.5 S 
None.. 
....do. 
Slightly brown. 
None... 
Brown. 
None... 
....do. 
95.7 
57.4 
105.2 S 
.do. 
_do_ 
.do. 
....do. 
....do. 
....do. 
....do. 
Darkened. 
None. 
.do. 
...do. 
...do. 
.do. 
Slightly brown. 
None 
.do. 
Severely molded and de- 
cayed. 
Considerably molded and 
decayed. 
Severely molded and de- 
cayed. 
Do. 
Do. 
Do. 
Considerably molded and 
decayed. 
Slightly molded and de- 
cayed. No change at 16 
months. 
Considerably molded and 
decayed. 
Slightly molded and de- 
cayed. Somewhat worse 
at 16 months. 
Slightly molded; no decay. 
No mold or decay. 
Very slightly molded. 
Severely molded; somewhat 
decayed. 
Severely molded; no decay. 
No change at 24 months. 
Severely molded; somewhat 
decayed. 
Somewhat molded; nc de- 
cay. No change at 22 
months. 
Somewhat molded; no de- 
cay. Somewhat decayed 
at 22 months. 
Slightly molded. 
Slightly molded; no decay. 
Slightly decayed at 22 
months. 
Slightly molded; consider- 
ably decayed. No change 
at 22 months. 
Severely molded; no decay. 
Severely molded; consider- 
ably decayed. 
No appreciable mold or de- 
cay. Slightly molded and 
decayed at 22 months. 
I Unless otherwise indicated, the chemicals were of "technical" quality. 
3 Solutions applied warm or hot. 
3 Saturated solution with some chemical in suspension. 
i Diluted with 95 per cent alcohol. 
8 Volatile oil of Monarda fistulosa, yielding carvacrol. Prepared and donated by the department of 
chemistry, University of Wisconsin (oil No. 5). 
6 The emulsions of oils No. 1, 2, 3, 4, and 5 were made in the following manner, using rosin size of about 
the same concentration as in 15. The rosin size was not cleared by use of excess sodium hydroxide. The 
oils added in small amounts were shaken with an equal volume of the emulsifying agent, then diluted to 
15,000 c. c. with water. The amounts of oil and emulsifying agent used were: No. 1 with equal volume of 
rosin size, slightly alkaline. No. 2 with equal volume of rosin size, plus 0.1 volume of saponin solution. 
No. 3 with equal volume of rosin size, plus 0.4 volume of saponin solution. No. 4 with equal volume of 
rosin size. No. 5 with equal volume of rosin size, plus 0.1 volume of saponin solution. 
7 Phenol portion of 5 (oil No. 4) . 
8 Nonphencl portion of 5 (oil No. 1). 
9 The undissolved portion of solid chemical was put on surface of pulp. 
10 This chemical appears to attack the fiber and weaken the pulp. It gives a pinkish cast to the pulp. 
II Solution made up in zinc-lined vessel, and lead precipitated out. 
12 Appears to weaken the pulp. 
1 3 On exposure to air and light solution forms red mercuric oxide. 
M Strong solution made up in 95 per cent alcohol and diluted to the desired concentration with water. 
I 6 The emulsions of nitrobenzene and orthonitrotoluene were made by shaking with the oils an equal 
volume of rosin size, of about the same concentration used in the paper mill, which had been previously 
cleared by adding NaOH solution. The oils were added in small amounts to the size solution and well 
shaken before adding the next portion. This gives an emulsion with the oils as the discontinuous phase 
and water as the continuous phase. 
16 First sprayed with salol, then with 0.5 per cent sodium carbonate. 
"Volatile oil of Monarda punctata, yielding thymol. Prepared and donated by the department of 
CiLP.mistry, University of Wisconsin (oil No. 2). 
* 8 Nonphenol portion of 17 (oil No. 3). 
