356 
Gleanings  in  Materia  Medica.  {^'"juiriss?''™' 
for  this  purpose  an  alcoholic  solution  of  iodine  in  the  presence  of  mer- 
curic chloride,  which  acts  on  the  unsaturated  fatty  acids  at  the  ordi- 
nary temperature,  the  excess  of  iodine  used  being  estimated  with  a 
solution  of  sodium  thiosulphate.  The  percentage  of  iodine  taken  up 
is  called  the  iodine  number."  The  following  table  is  given  by  the 
author. 
1.  Drying  oils. 
Linseed  
Hempseed  
Walnut  
Poppy  seed  
Pumpkin  seed- 
Sesame  
Cotton  seed  
Arachis  
Rape  seed  
2.  Non-drying  oils. 
Apricot  kernel  
Almond  
Castor  
Olive  
Olive  kernal  
Bone  oil  
Lard  oil.  
Butter  in  
Palm  oil  
Laurel  oil  
Tallow  
Suet  
Cacao  butter  
Nutmeg  butter- 
Butter  fat  
Cocoanut  oil  
Japanese  wax... 
158-0 
143  -0 
143 -0 
136-0 
121-0 
106-0 
106-0 
103-0 
10  1-0 
100-0 
98-4 
84-4 
82-8 
81 -8 
68-0 
59-0 
53-3 
51-5 
49-0 
40-0 
36  -0 
34-0 
31-0 
31-0 
8-9 
4-2 
Fatty  acid 
Melts  at 
Solidifies 
at 
value. 

L>eg. 
Deg. 
19  -0 
20*5 
16  o 
28  -  0 
24-5 
26-0 
27  -7 
30*5 
2/  . 
20-1 
12-2 
4-5 
0-0 
192-9 
14-0 
5-0 
195-4 
13  -0 
3-0 
181-0 
26  -0 
21*2 
191-7 
188-5 
30-0 
28  -0 
195-9 
42-0 
39-8 
47  -8 
42-7 
202-2 
27-0 
22-0 

45-0 
43-0 
196  -5 
41  -8 
40-0 
170-0 
52-0 
51  -0 
42-5 
40-0 
38-0 
35-8 
227-0 
24-6 
20-4 
261-3 
222-0 
^Solution  in  equal 
I  parts  glacial  acetic 
'•■  acid  is  rendered 
1    turbid  at 
107 
110 
114 
110 
Soluble  in  the  cold. 
85-111 
Soluble  in  the  cold. 
105-0 
27-0 
—DingJ,  PoIyL  Jour.,  vol.  253,  pp.  281-295 ;  Jour.  Chem.  Sac,  1884, 
p.  1435. 
