-50  Neiv  Vegetable  Coloring  Matter,  { ^'"rer'iS'r'"' 
hot  80  per.  cent,  alcohol,  from  which  it  crystallized  upon  cooling.  By 
successive  crystallizations  the  pure  substance  was  obtained. 
The  material  thus  gotten  was  a  tasteless,  yellow  compound,  appar- 
ently crystallizing  in  scales  or  needles.  Upon  examination  under  the 
microscope  these  plates  are  found  to  be  made  up  of  a  series  of  flat 
prisms,  joined  laterally.  The  crystals  are  unchanged  in  dry  or  moist 
air,  insoluble  in  cold  water,  very  slightly  soluble  in  hot  water,  but 
readily  soluble  in  alcohol  or  ether.  The  presence  of  even  a  trace  of 
alkali  or  alkaline  carbonate  also  causes  it  to  dissolve  with  deep  claret-red 
color.    The  crystals  melt  at  135°C. 
Two  lots  were  prepared  for  analysis  ;  one  was  dried  at  100°C.,  and 
the  other  at  125°C. 
Analysis  of  material  dried  at  100°  C 
I. 
II. 
Mean. 
Carbon, 
68-75 
68-79 
68-77 
Hydrogen, 
.     6 -05 
6-05 
6-05 
Oxygen, 
25-20 
25-16 
25-18 
100-00 
100-00 
100-00 
Analysis 
of  material  di'ied  at  125°  C 
I. 
II. 
Mean. 
Carbon, 
75-82 
75-00 
75-41 
Hydrogen, 
.  6-39 
6-69 
6-54 
Oxygen, 
17-79 
18-31 
18-05 
100-00 
100-00 
100-00 
The  mean  of  the  results  of  the  analysis  of  that  dried  at  125°C. 
would  give  a  fornuila  C28H29O5,  or  possibly  022^^^^^,  while  that  dried 
nt  100°C.  would  be  CagH^gO^H-SHp. 
The  accepted  formula  for  htematoxylin,  the  coloring  material  of  log- 
■wood,  is  CieHi.Og  Deutsch.  Chem.^Ges.  Ber.,''  1871,  p.  329),  which 
would  give  63*57  per.  cent,  of  carbon  and  4*63  per  cent,  of  hydrogen. 
Taking  the  work  done  within  the  past  few  years  on  h^ematoxylin  as 
a  guide,  the  action  of  numerous  reagents  was  then  tried  upon  the  new 
coloring  matter.  We  will  give  for  comparison  the  results  arrived  at 
with  hfematoxylin  and  then  state  our  results  with  the  Beth-a-barra 
color. 
Sodium  amalgam  has  no  action  upon  hsematoxylin ;  with  this  color- 
ing matter,  however,  we  obtained,  on  treatment  with  sodium  amalgam, 
a  white  compound,  which  under  the  microscope  is  seen  to  be  crystal- 
lized in  fine  needles.  The  examination  of  this  we  reserve  for  a  future 
communication. 
