412 
Wood-Tar  Creosote. 
f  Am.  Jour.  Pliarm. 
I  September,  ls99. 
No. 
Specific 
Gravity. 
Boiling- 
Point. 
Celcius. 
 1-  ■  
Per  Cent,  of  Substance  Distilled  Between  the  Following 
Temperatures,  C.°  Corrected. 
?-200° 
200-2050 
205-2 10° 
210-215° 
215-220° 
220-238° 
1*0748 
195-224 
5 
34 
26 
23 
6 
3 
1  '0748 
195-222 
20 
20 
30 
19 
7 
1 
3  
1  "0650 
2 10-238 
00 
00 
00 
30 
25 
40 
i'o642 
208-238 
00 
00 
2 
37 
21 
36 
5  •  •  •  •  \ 
1-049 
188-220 
18 
12 
12 
39 
6  
1*069 
200-225 
32 
.  18 
10 
24 
9 
4 
No. 
Color. 
Reaction. 
No  of  C.c.  of  7*5 
Per  Cent. 
NaOH  Solution 
Required  to  Dis- 
solve 2  C.c.  of 
Creosote. 
The 
Glvcerin- 
Water 
Test. 
Nearly 
colorless 
Faintly 
acid 
9 
Normal 
2    .  . 
Nearly 
colorless 
Faintly 
acid 
•8 
3  •  • 
Amber 
Faintly 
acid 
9 
Emulsion 
4  •  • 
Straw 
color 
Neutral 
7 
5  •  • 
Nearly 
colorless 
8 
6  .  . 
Nearly 
j  colorless 
Faintly 
acid 
8 
Normal 
20  C.c.  of  Alcoholic  Potash  Mixed 
with  1  C.c.  of  Creosote. 
f  Crystals  in  15  minutes. 
(  Solid  in  40  minutes. 
f  No  crystals  in  5  hours. 
\  Solid  in  18  hours. 
[Crystals  in  4  minutes. 
\  Solid  in  15  minutes. 
Solidified  almost  immediately. 
Solidified  on  cooling. 
No. 
Per  Cent,  of  Guaiacol. 
Per  Cent,  of  Potassium  Guaiacol 
and  Creosol. 
None 
60 
48 
8 
60 
4  •  • 
16 
106 
The  six  samples  were  obtained  directly,  as  far  as  could  be  ascer- 
tained, from  as  many  manufacturers.  The  boiling-points,  as  well  as 
other  tests,  show  that  all  of  the  samples  fail  to  comply  with  the 
U.S.P.  requirements.  There  was  a  slight  residue  in  every  case 
on  distillation.  The  alcoholic  potash-creosote  mixture  proved  the 
most  interesting.  With  Nos.  I,  2,  3  and  4  the  mixture  was  made  at 
the  ordinary  temperature,  and  the  last  two  according  to  the  direc- 
tions of  the  Pharmacopoeia. 
