Am.  Jour.  Pharm.  > 
Dec,  1879.  J 
Chemical  Notes. 
605 
has  led  Letts  to  announce  the  results  of  his  study  of  the  same  com- 
pound. Accepting  Baeyer's  generalization  that  bodies  of  the  phenol 
character,  when  treated  with  phtalic  acid  anhydride,  would  yield 
phtaleins,  he  endeavored  to  form  the  phtalein  of  hematoxylin.  In  this 
he  succeeeed,  and  obtained  the  desired  compound  in  the  form  of  brown 
flocks,  insoluble  in  water,  soluble  in  alcohol.  It  yields  with  potassium 
hydrate  and  ammonia  purplish-red  colors,  of  different  shades  from  those 
produced  with  these  reagents  and  hematoxylin  solution.  After  oxida- 
tion with  nitric  acid,  evaporation  of  the  solution  to  dryness  and  heating 
the  residue  with  resorcin,  the  characteristic  fluorescein  was  obtained. — 
Ibid.,  p.  1 65 1. 
On  the  behavior  of  Ammon'iacum  Resin  when  Distilled  with  Zn  Dust. 
— Ciimician  has  distilled  the  purified  ammoniacum  resin  with  zinc 
dust,  and  has  obtained  as  the  result  a  mixture  of  hydrocarbons  and  a 
phenol-like  body,  which,  after  study,  proved  to  be  an  ethyl-phenol.  The 
methyl  ether  of  this  phenol  was  also  found  to  accompany  it  in  the 
original  mixture.  The  hydrocarbons  proved  to  be  C8Hlt)  xylol  and 
C9H12  an  ethyl  toluol.  There  appeared  to  be  present  also  a  still  higher 
homologue  of  the  benzol  series  in  the  highest  boiling  fraction  of  the 
distillate.  The  author  contrasts  these  distillation  products  with  those 
obtained  by  submitting  the  terpene  resins  to  similar  treatment.  Thus, 
in  distilling  abietic  acid  or  elemi  resin  with  zinc  dust,  hydrocarbons  of 
the  naphtalin  series  are  obtained.  I  he  author  proposes  to  submit 
other  resins  to  the  same  treatment. — Ibid.,  p.  1658. 
On  the  action  of  Sulphuric  Acid  upon  Hydrocarbons  of  the  formula  C10  Hu 
(Terpenes). — H.  E.  Armstrong  and  W.  A.  Tilden  have  studied  the 
so-called  terebene  of  Deville,  gotten  by  the  action  of  sulphuric  acid  upon 
oil  of  turpentine,  and  find  it  to  be  a  mixture  of  camphene,  cymol  and 
terpilene,  three  distinct  hydrocarbons.  There  is  also  formed  in  the 
last  distillation  product  some  camphol  (borneol)  C10H17OH.  The  same 
results  were  gotten  with  both  American  turpentine  oil  and  the  French 
oil  of  turpentine. — Ibid  ,  p.  1752. 
On  the  Action  of  Iodine  upon  Oil  of  Turpentine.  —  Armstrong  had  shown 
over  a  year  ago  that  the  action  of  iodine  upon  camphor  yielded,  besides 
cymol  and  higher  homologues  of  the  benzol  series,  a  paraffin  like  hydro- 
carbon, C]0H2(j.  He  has  since  studied  the  action  of  iodine  upon  oil  of 
turpentine,  and  gets  the  same  product  in  part.  He  finds  cymol,  terpilene 
and  the  hydrocarbon,  C1(JH20>  before  spoken  of.  This  latter  hydrocarbon,, 
