Am.  Jour.  Pharm. 
Jan..  1893. 
Sandal-wood  and  Cedar  Oils. 
21 
only  the  potash  solution.  After  the  boiling,  the  remaining  alkali  is 
determined  by  titration  with  decinormal  hydrochloric  acid,  using 
phenolphthalein  as  indicator,  the  difference  between  the  amount 
required  in  the  two  experiments  being  due  to  the  alkali  combined 
with  the  oil. 
A  study  of  the  tables  will  indicate  certain  distinctive  features  in 
the  various  kinds  of  oils  examined. 
TABL,E  I. — Color  Reactions. 
o  . 
v  P. 
Nitric  Acid  1*5. 
Sulphuric  Acid 
r843. 
Bromine  and 
Chloroform. 
HC1  and  Chloro- 
form. 
Ferric  Chloride. 
Yellow,  to  reddish  Yellow   to  clear 
brown.  red-brown;  stea- 
dily darkening. 
The  same.  I  The"  same. 
Pale  orange  tint,  |  Acid. — Colorless, 
becoming  red.     j    Chlorof.  — Yel- 
I  lowish. 
Brown,  with  red- 
dish tint. 
The  same. 
Bright  brown , with 
after  tint  of  pur- 
ple 
The  same. 
Yellowish  -  brown 
to  deep  brown- 
ish-red. 
I  Rather  darker  tint;  The    same,  but 
than  No.  1.  rather  darker. 
Greenish,  passing  Bright  orange, 
i    to  indigo.  j   rapidly  darken- 
ing, finally  brow-; 
I  nish-3'ellow. 
Red,  passing  to  Orange-red.chang- 
dark  brown.       !    ing    rapidly  to 
;   dark  brown. 
Orange-brown,  to  Orange-brown,  to  [ 
deep  red-brown. j   deep  red-brown. 
The  same. 
Pinkish,  becoming 
brown . 
Bluish  green,  then 
green. 
Bluish  violet,  then 
indigo. 
Port  wine  color 
then  claret. 
Brownish  -  violet, 
becoming  deeper 
on  standing. 
Green  at   edges  ;  Orange,  then  red- 
salmon  to  orange  brown, 
in  centre,  finally 
indigo-green. 
judges  paler  green;  Rather  paler  than 
I    centre   deeper    No.  9. 
orange,    n  0  t\ 
changing  to  in-j 
digo. 
Brilliant  green  Same  as  No.  8. 
edges;  orange-red 
centre,  changing 
Sherry  color,  with 
purplish  tint, 
changing  to 
brownish  black, 
then  brown. 
The  same. 
to  pink. 
Slightly  greenish 
edges  ;  blood-red 
then  intense  pur- 
plish-brown. 
Orange-red  to  red- 
brown,  darker 
than  No.  8. 
The  same. 
The  same. 
I_ike  No.  1. 
Acid.—  Pale  yel- 
low. Chlorof. — 
Dull  pink. 
Acid.  —  Slightly 
yellow.  Chlorof. 
— Yellow-brown, 
becoming  paler 
with  greenish  tint. 
Acid.  —  Colorless. 
Chlorof. -Pinkish- 
violet,  fading  to 
yellow. 
Acid.  —  Colorless. 
Chlorof. — Yellow- 
brown,  then 
greenish  yellow. 
Acid.— Dull  yel- 
low.     Chlorof. —  j 
Pale  greenish- 
gray    to  deep 
brownish  green. 
Acid.  —   P  i  n  k.  \ 
Chlorof.  —  Rose 
colored,  fading 
to  greenish  ye\- 
low. 
Acid.  —  Pink. 
Chlorof —  Rose, 
fading  to  yel- 
low. 
Tike  No.  9. 
Tike  No.  9. 
Indigo,  to  green- 
ish-black ;  slowly 
fading. 
Brown  -  violet 
changing  to 
brownish  black, 
and  slowly  fading. 
The  same. 
Dark  violet,  fading 
to  dull  green. 
Brownish  -  violet, 
then  burnt 
sienna,  fading; 
slowly. 
Pale  blue  to 
green,  then  fad- 
ing to  yellow. 
Brown  -violet, 
changing  to 
brown  and  slowly 
fading. 
Deep  violet-brown 
very  slowly  fad- 
ing. 
Violet,  rapidly 
changing  to  yel- 
low. 
Tike  No.  S. 
Tike  No.  8,  but 
more  intense. 
Brown,  with  rose 
tint,  rapidly 
c  h  a  n  g  i  n  g  to 
dirty  yellow. 
