Am.  Jour.Pharm. 
June,  1899.' 
}    Recent  Literature  Relating  to  Pharmacy.  275 
then  carefully  watched,  but  no  change  was  noted  until  one  day 
after  about  two  hours'  heating,  an  examination  showed  that  it  had  a 
somewhat  spongy  appearance,  and  a  number  of  small  cracks  extended 
through  the  metal,  while  two  or  three  small  beads  hung  on  the  out- 
side. Calcium  oxalate  was  being  ignited. —  1 898,  Jour,  Soc.  Chem.  Ind.^ 
17,  1 107.  L.  F.  Kebler. 
CONSTANTS  OF  AMERICAN  LINSEED  OIL. 
A.  H.  Gill  and  A.  C.  Lamb  have  analyzed  a  number  of  samples  of 
genuine  linseed  oil,  with  the  following  results : 
■ 
cd 
4 
0  a 
A 
v> 
V 
H 
a,'J  • 
vi  H 
V  5 
H 
0  a  * 
U)  OJ  t3 
O  0  Ih 
V)  D  p 
Brand. 
rt  0 
"So 
So*  - 
5^  O 
0 
g£ 
pecifii 
1 
<u 
> 
Maut: 
I2 
odine 
in  Pe 
18 
Dry 
Hours 
Ui 
o-933 
79 
97 
1747 
180 
72 
°'932     ..  ,. 
70. 
90 
169-7. 
'  T80 
72 
3  Western  raw,  special  .  .  . 
0-934 
73 
105 
178-0 
.178 
72 
0-931 
7i"5 
106 
167*5 
178 
72 
0-931 
73 
105 
168-0 
168 
72 
0-936 
74 
100' 
,178-8 
178-8 
18 
0-938 
59"5 
101 
169-5 
% 
,  18 
8  Acid  bleached  
0-934 
52-5 
103 
i6o*o 
160 
,84 
9  Bleached  without  acid  .  . 
0-932 
60 
105 
162-0 
,  162 
84 
0-934 
73 '5 
135  . 
i57-o 
181 
84 
Usual  constants  
o-93i-o-937 
57-74 
103-126 
170-188 
0-934 
in 
176 
Menhaden  oil,  No.  10,  was  examined  because  it  is  used  as  a  sub- 
stitute for,  and  adulterant  of,  linseed  oil. — 1899,  Jour,  Am.  Chem. 
Soc,  21,  29.  1  L.  F.  K. 
DETECTION  OF  CITRIC  ACID. 
Deniges  {Journ.  de  Pharm.  et  Chimie,  1898,  487)  presents  a  method 
of  estimation  of  minute  quantities  of  citric  acid  even  when  mixed 
with  tartaric.  He  adds  to  5  c.c.  of  a  2  per  cent,  solution  of  the 
suspected  body  1  c.c.  of  2  per  cent,  permanganate  solution  and 
