172  Cardamom  and  Oil  of  Cardamom.    •  {^JS^uS™' 
will  readily  understand,  is  a  very  important  item  in  an  oil  which  is 
used  so  largely  in  perfumery.  It  may  interest  you  if  we  give  you 
a  few  particulars  of  the  tests  of  batches  we  have  done  during  the 
last  few  years.  Some  of  the  tests  were  repeated  more  than  twelve 
months  after  the  oil  was  distilled,  and  the  results  did  not  vary 
appreciably : 
TESTS  FROM  I9OI  TO  I908. 
Optical  Rotation.  Specific  Gravity. 
+  3°-5°   •  :•  0.9474 
-(-12.25°   0.9102    Qualities  not 
+  12.30°   0.9283    used  by  us.1 
+  36.88°   0.9315 
  0.9291 
  0.9330 
  0.9293 
 :  .  .  .  O.9322 
  0.9300    Sol.  in  70%  ale. 
3 1. 6°    0.9349       1  in  4  vol. 
+  32.16°    0.9408       1  in  3  vol. 
+  30.60   0.9309 
+  2975°   0.9302 
  0.9305 
+  39-I4°    0.9352       1  in  3  vol. 
+  28.00°    0.9322        1  in  3  vol. 
+  30.85°    0.9347       1  in  3  vol. 
+  31-2°    0.9357       1  in  4^  vol. 
+  30.750    0.9349       1  in  4//2  vol. 
+  28.25°    0-9365        1  in  3  vol. 
+  22.2°    O.9314 
+  22.8°   0.933 1       1  m  3  v°l- 
+  24.35°    0.9329       1  in  3  vol. 
+  27.9°   0.9335        1  in  3  vol." 
—Stafford  Allen  &  Sons,  Ltd. 
1  "  All  our  regular  oil  is  distilled  from  Ceylon  fruit. 
"  In  1901  we  distilled  a  sample  of  wild  cardamoms.  These  gave  us  an 
optical  rotation  of  -|-  12.25  and  a  specific  gravity  of  0.9102. 
"  The  same  year  we  tried  a  sample  of  Mangalore  cardamoms,  which 
gave  us  a  result  of  optical  rotation  -\-  12.30  and  specific  gravity  0.9283." 
