468 
Leaves  of  Juglans  Nigra. 
Am.  Jour.  Pharm. 
Oct.,  1886. 
Albumin,     1*750 
Dextrin,                                                         1*900  2-200 
Organic  acid  and  coloring  matter,                       6'900  6*000 
Soluble  Arabic  acid?                                       1*050  6*573 
By  caustic  soda :  Mucilage  and  Albuminoids,            1-200  9*070 
Not  precipitated  by  acetic  acid  and  alcohol,         3*700  4*250 
By  hydrochloric  acid :  Parabin,                              3*750  6*450 
Lignin,                                                             6*876  4  380 
Insoluble  residue,  55*084  14*945 
Moisture                                                           9*575  7*500 
The  coloring  matter  of  the  testa  was  not  taken  up  by  petroleum  spirit 
or  ether,  but  was  freely  soluble  in  alcohol  and  in  alkali ;  it  is  precipi- 
tated by  lead  acetate,  and  using  alum  as  a  mordant,  gave  a  light 
pink-colored  dye. 
The  alcoholic  extract  was  treated  with  water,  the  solution  pre- 
cipitated with  lead  acetate,  treated  with  sulphuretted  hydrogen,  and 
both  acid  and  alkaline,  agitated  with  solvents;  the  alkaloid  was  taken 
up  by  chloroform  from  the  alkaline  liquid,  and  seems  to  be  present 
in  larger  proportion  Hn  the  testa  than  in  the  kernel.  An  aqueous 
solution  gave  with  potassio- mercuric  iodide  a  bulky  white,  and  with 
gold  chloride  a  crystalline  yellow  precipitate.  Sulphuric  acid  and  potas- 
sium chromate  produced  at  once  a  muddy  brown  color,  rapidly  chang- 
ing to  light  green,  which  slowly  faded.  Sulphuric  acid  gave  a  light, 
flesh-colored  solution ;  ferric  chloride  only  a  perceptible  darkening. 
PKELIMINARY  ANALYSIS  OF  THE  LEAVES  OF 
JUGLANS  NIGKA. 
By  Lillie  J.  Martin. 
Read  before  the  American  Science  Association. 
So  far  as  I  have  been  able  to  ascertain  no  chemical  study  of  Jug- 
lans nigra  has  been  made.  Certain  constituents  of  Juglans  are  given, 
but  the  disregard  of  botanical  requirements  makes  it  impossible  for 
those  unacquainted  with  the  constituents  of  this  plant  to  tell  whether 
it  is  this  particular  species.  So  meager  are  the  descriptions  of  the 
mode  of  obtaining  the  various  products,  and  their  properties  when 
found,  that  it  is  doubtful  whether  even  a  chemical  study  would  settle 
the  question.  Unfortunately,  giving  a  name  to  some  substance  is  not 
giving  the  most  minute  description  of  it. 
The  leaves  used  in  this  work  were  picked  from  a  fine  black  walnut 
tree  in  July.    Sections  were  immediately  cut  and  a  superficial  micro- 
