40  Analysis  of  the  Bark  of  Honey  Locust.  {^'JZl^xm^' 
CHEMICAL  ANALYSIS  OF  THE  BARK  OF  HONEY 
LOCUST,  GLEDITSCHIA  TRIACANTHOS. 
By  IvOuis  P.  Carstens,  Ph.G. 
Contribution  from  the  Chemical  Laboratory  of  the  Philadelphia  College  of 
Pharmacy.   No.  160. 
The  specimen  analyzed  was  obtained  in  central  Pennsylvania. 
The  results  of  the  analysis  were  as  follows  : 
Petroleum  Ether  Extract  : 
Per  Cent. 
Fat,  wax,  etc   1*38 
Ether  Extract: 
Resin,  1*15  per  cent.;  organic  acid,  etc   1*17 
Absolute  Alcohol  Extract: 
Resin,  097  per  cent.;  alkaloid,  etc   1  62 
Water  Extract  : 
Glucose,  0*63  per  cen,t.;  saccharose,  0*57  per  cent.;  mucilage, 
2*08  per  cent.;  dextrin,  1*92  per  cent.;  etc   6*51 
Alkaline  Water  Extract: 
Pectin  and  albuminoids,  4*84  per  cent.;  etc  I3'68 
Acidulated  Water  Extract: 
Pararabin,  etc   3*62 
Ivignin   11 76 
Cellulose   42*42 
Moisture   5*10 
Ash   7  -oo 
Ivoss  and  undetermined   574 
Total  ioo*oo 
The  ash  contained  potassium,  calcium,  aluminum  and  ferric  iron, 
as  chlorides,  sulphates,  carbonates  and  phosphates. 
Starch,  tannin  and  glucosides  were  not  present. 
To  obtain  more  of  the  organic  acid  and  the  alkaloid,  which  were 
indicated  in  the  proximate  analysis,  for  further  examination,  about 
500  grammes  of  the  ground  bark  were  percolated  with  95  per  cent, 
alcohol.  After  reducing  the  percolate  to  a  small  bulk  by  distilla- 
tion, it  was  diluted  with  about  five  times  its  bulk  of  distilled  water, 
distinctly  acidified  with  hydrochloric  acid,  and  the  mixture  filtered. 
After  agitating  the  filtrate  with  chloroform,  it  was  made  alkaline 
