480 
Analysis  of  Phlox  Carolina. 
Am.  Jour.  Pharm. 
Oct.,  1886.' 
Gum,. 
acid,  10-86  per  cent. 
Less  calcium  oxide  in") 
calcium  oxalate,  / 
Loss,. 
...  2-34  per  cent.  ") 
.qo 
it 
1 -AQ 
"  f 
A-KO 
ft 
..  "99 
11 
..  2-90 
:  } 
r 
..  7-60 
"  J 
..  trace. 
..36-65 
it 
a 
n 
..  1-19 
it 
♦ 
97-44 
2-56 
tt 
100-00 
tt 
Soluble  in  water,  8-68  per 
cent. 
Of  all  these  different  portions,  that  soluble  in  petroleum  spirit  is  the 
most  interesting.  The  solution  was  red  and  fluorescent,  and  on  evapo- 
rating the  solvent  the  residue  separated  in  fern-like  masses  of  crystals 
on  the  side  of  the  vessel,  while  that  in  the  bottom  formed  into  star- 
like circular  masses  of  acicular  crystals.  These  crystalline  forms  dis- 
appeared to  a  great  extent  on  removing  the  mother  liquor.  The  dry 
residue  was  treated  with  66  per  cent,  alcohol  to  remove  the  red  color- 
ing matter,  and  the  residue  thus  purified  was  crystallized  three  times 
from  95  per  cent,  alcohol,  by  using  it  boiling  hot,  and  then  twice  from 
absolute  alcohol,  which  left  the  compound  in  white,  opaque,  warty 
crystals  in  the  bottom  of  the  beaker,  and  the  fern-like  crystals  on  the 
side.  The  finest  crystals  were  gotten  by  allowing  the  hot  95  per  cent, 
alcoholic  solution  to  cool  slowly. 
Fig.  1  shows  such  a  crystallization  in  the  bottom  of  the  dish  made 
up  of  a  compact  mass  of  acicular  crystals  supporting  one  another  with 
the  radiating  growth  around  the  base.  Fig.  2  shows  the  same  on  the 
side  of  the  vessel. 
Physical  Properties. — This  compound  has  a  slight  aromatic  odor  but 
no  taste,  it  is  readily  dissolved  by  chloroform  and  ether  in  addition  to 
the  above  mentioned  solvents.  Its  melting  point  was  found  to  be 
1 55*4°  C.  although  further  purification  may  alter  this  figure  slightly. 
On  heating  a  little  above  its  melting  point  it  sublimes.  A  transparent 
crystal  causes  a  beautiful  play  of  colors  with  polarized  light. 
Chemical  Properties. — On  heating  above  the  melting  point  it  ignites 
