Am.  Jour.  Pharm. 
July,  1880. 
Chemical  Notes, 
367 
represents  a  physical  unity  is  separated  into  two  parts,  and  he  is  not 
disposed  to  found  upon  these  experiments  any  new  hypotheses  regard- 
ing the  constitution  of  iodine. — Ber.  der  Chem.  Ges,^  xiii,  p.  869. 
Victor  Meyer  has  just  published  a  note  announcing  results  confirm- 
ing those  of  Crafts.  He  has,  indeed,  by  the  use  of  considerably 
higher  temperatures  than  any  yet  applied,  obtained  figures  lower  than 
those  of  Crafts'.  Thus  he  finds  the  density  of  iodine  at  the  highest 
temperature  reached  to  be  4*53  to  4*55  to  4*57. 
The  calculated  density  for  1^  is  8*79  ;  for  f  I2  is  5*83  ;  for  1^  is  4*39. 
He  proposes  to  continue  the  experiment  in  order  to  see  if  the  limit  is 
reached  at  4*39,  which  would  make  the  result  one  of  simple  dissocia- 
tion as  Crafts  supposes,  or  if  a  density  of  2*93  (Jig)  may  be  reached 
which  would  agree  with  the  "chlorogen"  hypothesis  of  the  compound 
nature  of  the  halogen  elements. — Ibid.^  p.  lOio. 
Organic  Chemistry. —  On  a  Supposed  Crystallixed  Chinoidin  Borate. 
— Julius  Jobst  has  examined  a  compound  described  by  Pavesi  in  "La 
Farmacia,"  1879,  No.  26,  as  a  crystallized  compound  of  chinoidin  and 
boracic  acid.  He  found  that  the  yellow,  scaly  crystals,  prepared  as 
directed  by  Pavesi,  when  recrystallized  several  times  from  water,  lost 
more  and  more  of  the  chinoidin  until  finally  scales  of  pure  boracic  acid 
only  remained,  easily  recognized  by  their  lustre  and  greasy  feeling. 
He  concludes,  therefore,  that  the  crystals  examined  were  crystals  of 
boracic  acid,  holding  traces  of  chinoidin  mechanically  enclosed.  The 
existence  of  a  crystalline  compound  of  chinoidin  is,  as  far  as  the  author 
knows,  not  as  yet  established. — Ibid.^  p.  750. 
The  Alkaloids  of  Belladonna^  Datura^  Hyoscyamus  and  Duboisia. — 
Ladenburg,  whose  work  in  the  preparation  of  artificial  alkaloids  has 
already  been  quoted  (this  journal,  current  vol.,  pp.  148  and  198),  sum- 
marizes our  knowledge  of  this  class  of  alkaloids  in  a  short  notice  : 
Atropia  Belladonna  contains  at  least  two  alkaloids,  which  on  account 
-of  their  different  specific  gravity,  may  be  designated  as  heavy  and  light 
atropia.  The  heavy  atropia  is  the  alkaloid  commonly  known  under 
that  name,  first  prepared  pure  by  Meyn  and  established  by  Liebig  as 
Cj^H23N03  in  composition.  Its  gold-salt  is  lustreless  and  fuses  at 
135° — 137°'  From  its  decomposition  products  the  author  reformed 
the  alkaloid  last  year.  The  light  atropia  fuses  at  107®  and  yields  a  gold  - 
■salt  fusing  at  159°,  the  analysis  of  which  shows  its  composition  to  be 
Cj7H23N03,Hcl,Au,Cl3.  This  alkaloid  is  therefore  identical  with 
Hyoscyamina. 
