366  Abstracts  from  the  French  Journals.  f^/^^""' 
of  left  rotating  calcium  tartrate  and  right  rotating  calcium  malate, 
of  the  formula  CaC4H406,  CaC4H405  -j-  CH2G,  and  on  being  treated 
with  sufficient  sulphuric  acid,  yields  tartromalic  acid,  in  deliquescent 
crystals.  Some  white  wines  were  found  to  contain  a  considerable 
amount  of  malic  acid  ;  this  acid  gradually  disappears  in  the  grapes 
as  they  ripen. 
Analysis  of  lead  chr ornate  • — Chrome  yellow,  2  gm.,  is  well  shaken 
with  binormal  potassa  solution,  20  cc,  until  decomposition  has 
been  effected,  basic  lead  chromate  and  potassium  chromate  being 
formed  according  to  the  equation  2PbCr04  -f  2KHO  ==  PbCr 
04,PbO  -j-  K2Cr04  -f  H20.  The  mixture  is  then  diluted  with  water, 
the  liquid  decanted,  and  the  excess  of  alkali  determined  with  normal 
sulphuric  acid,  phenolphthalein  being  used  as  an  indicator;  the 
amount  of  lead  chromate  is  calculated  from  the  difference  of  the 
alkali  as  above  indicated. — Lachaud  and  Lepierre,  in  Bull.  Soc.  Chim., 
3  ser.,  vi,  235. 
Lepidium  sativum  and  Raphanus  sativus  have  bee.i  grown  by  P. 
Lesage  and  watered  with  solution  of  sodium  chloride.  Such  plants 
produced  modifications  closely  analogous  to  those  observed  in  the 
same  plants  growing  near  the  sea  coast,  and  the  stems  and  roots  con- 
tained considerable  amounts  of  table  salt. — Compt.  rend.,  cxiv,  143. 
Nitro-antipyrine  has  been  prepared  by  E.  Jandrier  {Compt.  rend., 
cxiv,  303),  by  dissolving  antipyrine  in  10  parts  of  concentrated 
sulphuric  acid,  adding  drop  by  drop  ^  part  of  nitric  acid,  spec.  grav. 
135,  and  pouring  the  mixture  into  cold  water;  the  precipitate, 
crystallized  from  boiling  acetic  acid,  forms  straw-yellow  needles, 
which  melt  at  2600  C,  and  are  slightly  soluble  in  alcohol,  but 
insoluble  in  cold  water. 
Daturic  acid. — E.  Gerard  has  studied  the  salts  of  this  acid, 
obtained  by  him  from  stramonium  seed.  (See  Am.  Jour.  Phar.,  1890, 
p.  493.)  The  normal  alkali  salts  are  crystalline,  soluble  in  a  small 
quantity  of  hot  water,  precipitated  from  the  solution  by  table  salt, 
and  decomposed  by  much  water  with  the  production  of  a  crystalliz- 
ab?e  acid  salt.  The  copper  and  silver  salts  crystallize  from  hot 
alcohol,  but  are  insoluble  in  water  and  ether.  The  lead  salt  is  amor- 
phous and  only  sparingly  soluble  in  hot  alcohol  or  boiling  ether. 
The  acid  yields  an  uncrystallizable  bromo  derivative  C17H33Br02. 
On  distilling  daturic  acid  over  lime  daturone  C33H660  is  obtained, 
