206 
Oil  of.  Bergamot. 
Am.  Jour.  Pharm. 
May,  1908. 
Spec. 
Rota- 
Solu- 
Per 
Per  Cent. 
Grav. 
tion 
bility 
Cent. 
Acid 
Linalyl 
Remarks  . 
15°  C. 
100  m.tn. 
Value. 
Residue. 
Value. 
Acetate. 
I. 
•875 
-f-180.  20' 
160 
6-6 
4'9 
ig'6 
Adulterated,  probably  turpen- 
tine. 
2. 
•885 
+n°  36' 
260 
5*6 
2'I 
37'8 
Normal. 
3- 
•881 
—  22°  40' 
225 
4-6 
2*8 
3i-8 
Normal. 
4. 
•889 
+  7°  52' 
220 
5'5 
2"I 
34'8 
Normal. 
5- 
•886 
4-  9°  30' 
285 
6-i 
2-8 
37-8 
Normal. 
6. 
•869 
-35° 
140 
4*b 
i '4 
20"  I 
Adulterated,  probably  lemon, 
citrene  or  orange. 
7. 
•886 
+160  32' 
270 
4'8 
2-S 
27*4 
Adulterated,    probably  dis- 
tilled bergamot. 
8. 
•884 
-130  28' 
260 
6-4 
4*2 
35'8 
Normal. 
9- 
•884 
~I3°  36' 
270 
5  5 
4'2 
37'8 
Normal. 
10. 
•8S2 
280 
6-4 
2-8 
37'S 
Normal. 
II. 
•835 
+  9°  2D' 
255 
4-6 
1 '4 
3S-6 
Normal. 
12. 
•882 
+20°  1 
220 
4'5 
2*1 
33*7 
Normal. 
13- 
•872 
+34° 
4-0 
1 '4 
23'9 
Adulterated,  probably  lemon, 
citrene  or  orange. 
14. 
•886 
+15°  20' 
290 
6-o 
3-o 
38-6 
Normal. 
I5. 
•883 
+  21° 
250 
5*7 
2.8 
32'9 
Normal. 
16. 
•876 
+34° 
170 
45 
28 
23'5 
Adulterated,  probably  lemon, 
citrene,  or  orange. 
17- 
•878 
+  20°  36' 
230 
4"  2 
2-8 
31*3 
Adulterated,     probably  dis- 
tilled bergamot. 
18. 
•875 
+170  20' 
200 
3*3 
If  2 
32'9 
Adulterated,  alcohol  and  free 
acid. 
*9- 
•883 
+io°  24' 
290 
57 
2-8 
35*2  : 
Normal. 
20. 
•882 
+200  5' 
'  230 
4'5 
2'8 
33"3 
Normal. 
21. 
•881 
+  io°  30' 
280 
4'3 
2"I 
35'l 
Normal. 
22. 
•876 
+400 
140 
4-5 
2-8 
20*1 
Adulterated,  probably  lemon, 
citrene  or  orange. 
23- 
•880 
+  22°  20' 
210 
4*5 
2-8 
30-8 
Adulterated,    probably  dis- 
tilled  bergamot. 
Specific  Gravity. — The  specific  gravity  limits,  as  given  by  the 
various  authorities,  are  as  follows: 
Schimmel  &  Co  *88i  to  -886 
Parry  -882  to  '886 
Gildemeister  &  Hoffmann  '882  to  "886 
These  limits  are  confirmed  by  the  results  which  we  have  obtained. 
All  the  oils  in  the  above  table,  which  may  be  classed  as  pure  have 
a  specific  gravity  varying  from  -88 1  to  -886,  except  in  one  case 
(No.  4),  where  the  specific  gravity  was  -889. 
Rotation. — The  rotation  varies  from  -f-  8°  to  4-  240  (Schimmel, 
Report,  April-May,  1905).  Gildemeister  &  Hoffman,  also  Parry, 
give  -J-  8°  to  -f  20°  as  the  limits  for  pure  oils.  In  most  cases, 
owing  to  the  dark  color  of  the  oil,  this  determination  must  be  made 
in  a  50  or  20  m.m.  tube.  The  pure  oils  which  we  have  examined 
have  rotations  varying  between  -f-  J°  52'  and  -f  21°. 
