Am.  Jour.  Pharm.  \ 
November,  1896.  J 
The  Tannin  of  Some  Acorns. 
60 1 
No. 
of  Sample. 
Estimated 
Sb  by 
Method 
No.  1. 
Sb  by 
Method 
No.  2. 
Sb  by 
Method 
No.  3. 
Remarks. 
2670 
69*12 

70-23 
— 
58-43 
68-29 
Labeled  stibic  acid. 
3  
48*00 
70-92 
71-27 
4  .... 
82-68 
82-40 
82-91 
U.S. P.  in  every  respect. 
5  
81-84 
80-40 
82-55 
U.S. P.  in  every  respect. 
6  
71-05 
78-34 
8i-6t 
For  use  in  the  arts. 
The  per  cent,  of  Sb203  in  the  different  samples,  calculated  from 
the  amount  of  Sb  estimated  by  process  No.  i,  is  as  follows: 
Sample  No.  I,  32-04  per  cent.;  sample  No.  2,  not  estimated ;  sample 
No.  3,  57-60  per  cent.;  sample  No.  4,  99  21  per  cent.;  sample  No.  5, 
98  2 1  per  cent.;  sample  No.  6,  85-26  per  cent. 
An  attempt  was  made  to  estimate  the  Sb  in  the  Sb204  obtained 
by  the  ignition  method,  using  the  other  two  processes,  but  no  satis- 
factory results  could  be  obtained. 
305  Cherry  Street,  Philadelphia,  Pa. 
THE  TANNIN  OF  SOME  ACORNS. 
By  Henry  Trimble. 
Contribution  from  the  Chemical  Laboratory  of  the  Philadelphia  College  of 
Pharmacy.  No.  159. 
Having  been  repeatedly  questioned  concerning  the  astringent 
value  of  acorns,  I  determined  this  year  to  make  some  tests  of  them 
from  a  few  species  of  oaks.  The  season  just  passed  has  been  one 
in  which  the  oaks  of  this  vicinity  fruited  abundantly.  In  a  good 
season  the  chestnut  oak,  Quercus  prinus,  probably  yields  the 
greatest  amount  of  fruit,  as  the  acorns  are  very  large ;  the  white 
oak,  Q.  alba,  however,  bears  very  abundantly,  as  shown  in  the 
accompanying  illustration,  Fig.  I.  A  tree  covered  with  fruit  is 
a  conspicuous  object  about  the  first  of  September,  and  until  the 
acorns  fall  a  month  later. 
