AmXJu°gU:'I879arm }  Chemical  Notes.  j  9  7 
crystals,  which,  after  several  recrystallizations  out  of  carbon  disulphide>. 
proved  on  analysis  to  have  the  composition  P2S5.  The  corresponding 
trisulphide,  P2S3,  could  not  be  obtained  even  though  exactly  the  proper 
quantities  of  phosphorus  and  sulphur  were  heated  together  in  the  same 
way.  The  crystals  formed  in  this  case  proved  to  have  the  composi- 
tion PS2.  Possibly  the  formula  should  be  P2S4.  A  vapor- density 
determination  will  be  made  to  determine  whether  this  may  be  so. 
Although  various  mixtures  of  the  two  elements,  these  two  products- 
were  the  only  compounds  that  could  be  obtained. — Ber.  der  Cbem.  Ges.y 
xii,  p.  940. 
On  the  Atomic  weight  of  Antimony. — As  Prof.  J.  P.  Cooke,  Jr.,  who 
spent  some  time  on  the  subject,  recently  declared  the  atomic  weight  of 
antimony  to  be  120,  Kressler,  who  had  made  a  previous  determina- 
tion 122,  has  submitted  Cooke's  work  to  a  careful  revision,  and  has  at 
the  same  time  repeated  his  own  experiments.  He  finds  numerous 
faults  in  Cooke's  work  which  he  dwells  upon  in  great  detail.  After 
correcting  these  he  finds  that  Cooke's  results  would  probably  agree 
with  those  gotten  by  himself  previously.  He  again  re-asserts  the  atomic 
weight  to  be  122. — Ber.  der  Chem.  Ges.,  xii,  p.  1044. 
Organic  Chemistry. —  On  the  Oxydation  of  Chinolin. — A  number  of 
new  results  have  been  published,  bearing  upon  the  question  of  the  oxy- 
dation of  the  quinia  alkaloids.  Thus,  both  Hoogewerff  and  Van.  • 
Dorp,  and  W.  Kcenigs,  have  studied  independently  the  oxydation  of 
chinolin  by  means  of  potassium  permanganate.  The  first  mentioned 
of  these  investigators  have  studied  the  chinolin  from  the  coal  tar 
residue,  while  Kcenigs  has  studied  cinchonin-chinolin  only.  In 
both  cases  the  principal  product  obtained  was  dicarbopyridinic  acid„ 
C7H5N04,  a  derivative  of  pyridin,  one  of  the  coal  tar  bases.  If  the 
calcium  salt  of  this  acid  be  heated  with  an  excess  of  caustic  lime  there 
is  obtained  an  alkaline  distillate,  which  possesses  the  characteristic  odor 
of  Dippel's  oil. — Ber.  der  Chem.  Ges.,  xii,  pp.  747  and  983. 
On  the  Oxydation  Products  of  Quinia. — Skraup  has  followed  up  his 
experiments,  on  the  oxydation  of  cinchonia  and  cinchonidia,  by  a  trial 
of  the  oxydation  of  quinia  itself. 
Quinia  sulphate  was  mixed  in  aqueous  solution  with  sufficient  sul- 
phuric acid  to  change  all  the  potassium  of  the  permanganate  into 
neutral  sulphate.    A  3  per  cent,  permanganate  solution  was  added  in. 
