Am.  Jour.  Pharm. 
May,  1888. 
Cassia  Marilandica. 
233 
chloric  acid  (1  percent.)  for  determining  pararabin,  etc.;  with  chlorine 
water  for  determining  lignin ;  and  with  nitric  acid  and  potassium 
chlorate  for  determining  hydrocellulose.  The  remaining  residue  was 
weighed  as  cellulose  after  deduction  of  the  ash. 
The  starch  was  estimated  quantitatively  from  five  grams  of  a  fresh 
portion  of  the  powdered  drug.  This  was  mixed  with  a  4  per  cent,  solu- 
tion of  caustic  potash  in  alcohol,  and  heated  to  boiling  for  one  day, 
using  an  upright  condenser.  After  filtering  and  washing,  the  residue 
was  exhausted  with  water  to  remove  mucilage,  etc.  The  remaining 
residue  was  then  boiled  with  dilute  HCl  to  convert  the  starch  into 
glucose,  which  was  then  calculated  from  the  cuprous  oxide  formed  in 
an  alkaline  solution  of  copper ;  upon  ignition  and  multiplying  by  0.408, 
the  amount  of  starch  was  obtained. 
The  results  of  the  proximate  chemical  analysis  are  tabulated  as  fol- 
lows : 
Soluble  in  petroleum  spirit  : 
Fixed  oil  
Volatile  oil  
Wax,  soluble  in  chloroform  
Insoluble  residue — caoutchouc 
Soluble  in  stronger  ether  : 
Extractive  soluble  in  H2O — trace  of  tannin. 
Extractive  soluble  in  alcohol  (chlorophyll). 
Insol.  residue  (decomposed  chlorophyll)   
Soluble  in  absolute  alcohol :  1 
Tannin  ....| 
Glucose  j 
Other  extractive  and  coloring  matter,  soluble  in  HgOj 
Phlobaphenes,  soluble  in  NH4OH  .*  
Soluble  in  distilled  ivater: 
Mucilage  
Dextrin  and  allied  carbohydrates  
Albumin  
Glucose   
Saccharose  
Organic  acids  and  allied  substances  
Undetermined — active  principle,  coloring  matter,  etc. 
Soluble  in  caustic  soda  solution:  (0.2  per  cent). 
Albuminoids  
Extractive,  not  ppt.  by  acetic  acid  and  alcohol  
Soluble  in  dilute  hydrochloric  acid  (1  per  cent.)  ; 
Pararabin  
Starch  
Oxalate  of  calcium  
Albuminoids  and  extractive  matter  
3.200 
.040 
.300 
.100 
.030 
1.980 
.860 
3.640 
2.870 
7.400 
20.240 
.380 
8.720 
