•}    Iodine  Absorption  of  Essential  Oils.  575 
43  J 
e 
(5 
Snow. 
Snow. 
Time, 
ut  16  1: 
First  work 
rent 
Tim 
to  4 
Willia 
Tim 
3  to  4 
W  CO 
abo 
15  hrs. 
40  hrs. 
Oil  Savine,  
279*5 
162*7 
166*0 
207*3 
183*0! 
"  Thyme,  
"  (red),  
170*0 
210*0 ! 
181  *5 
1 68*4 
300*0 
377-0 
345-o 
397'Q 
80  *o 
267*8 
<<  «< 
"  Winter-green,  true,    .  . 
"       "              (oil  birch), 
247-8 
i*o 
3-3 
synthetic, 
3-8 
Anethol,  
177-4 
182*9 
177-8 
0*46 
2*8 
Menthol,  
0*12 
None. 
Thymol,  
171*5 
201 -o ! 
181  *o! 
The  writer  will  not  attempt  to  pass  any  extended  remarks  on  these 
figures.  A  critical  examination  of  them  speaks  for  itself.  How- 
ever, attention  may  be  directed  towards  Aniseed,  Cassia,  Cinnamon, 
Cloves,  Eucalyptus,  Juniper,  Nutmeg,  Pennyroyal,  Peppermint, 
Rosemary  and  Sage. 
As  regards  purity,  it  may  be  said  that  Mr.  Williams  obtained  the 
oils  under  assurance  of  their  purity,  the  purpose  to  which  they 
were  to  be  put  having  been  specified.  Mr.  Davies  felt  the  "  utmost 
confidence  in  the  genuineness  "  of  those  oils  marked  in  this  table 
with  an  asterisk.  Some  of  the  oils  used  by  the  writer  were  distilled 
in  small  quantities  by  himself,  for  the  purpose  of  this  examination, 
viz :  those  in  column  four.  The  others  were  purchased  in  open 
market  from  good  sources,  though  no  mention  was  made  of  the  pur- 
pose to  which  they  were  to  be  put. 
CHLOROFORM  IODINE. 
The  long  time  required  to  complete  the  reaction  in  the  use  of 
Hubl's  solution,  the  instability  of  this  solution  and  certain  peculiari- 
ties which  it  exhibited  led  the  writer  to  try  a  simple  chloroform 
