^'"Aj?ii'^'i88?™*' }        Gleanings  from  Foreign  Journals.  173 
is  added  to  the  chloral  hydrate,  and  after  a  minute  the  liquid  assumes 
a  pink  color. — Arch.  d.  Pharm.,  vol.  223,  p.  26  ;  Ph.  Gentralh.,  1885, 
Antiseptic  Vinegar,  in  place  of  "  Vinaigre  de  Toilette." — 
R    Aetheris  acetici  •   8*0 
Acid,  acetic,  cone   120  0 
Tinct.  eucalypti  globuli   60*0 
Aqu8e  coloniense   960*0 
—Der  Fortschritt,  No.  2;  Ph.  Centralhalle,  1885,  p.  6. 
Vapor  of  Glycerin  for  Cough. — M.  Trastour  has  employed,  with 
great  advantage,  the  vapor  of  glycerin  for  alleviating  distressing  or 
frequent  cough,  irritation  of  the  thoat,  etc. 
About  50  or  60  Gm.  of  glycerin  are  heated  in  a  porcelain  capsule, 
and  the  vapor,  which  is  copiously  disengaged,  is  breathed  by  the  suf- 
ferer. Carbolic  acid  dissolved  in  glycerin  may  also  be  employed. — 
Gaz.  Med.  de  Nantes. 
Detection  of  Copper  and  Lead  in  Wine. — Hager  recommends  mixing 
the  suspected  wine  with  ^  or  J  volume  of  clear  liquor  sodse,  when  the 
mixture  should  remain  clear  even  if  boiled ;  a  colored  turbidity  would 
indicate  the  probable  presence  of  copper.  Put  6  cc.  of  the  clear  mix- 
ture in  a  test-tube  and  introduce  a  piece  of  tin  foil,  which  should  be 
entirely  covered  by  the  liquid ;  warm  in  a  water-bath  for  about  J  or  1 
hour.  If  the  wine  be  free  from  lead  and  copper,  the  tin  foil  will 
remain  glossy;  slight  traces  of  these  metals  cause  the  tin  foil  to  lose 
its  lustre,  and  to  become  grayish  ;  in  the  presence  of  more  than  traces 
of  these  metals  the  tin  foil  will  become  dark  gray  to  dark  grayish 
black  (lead) ;  dark  steel  colored,  brown  or  brownish  black  (copper). 
Boiling  will  accelerate  the  action.  Presence  of  zinc  or  arsenic  will 
not  interfere  with  the  above  reaction. — Ph.  Cenb^alhalle,  No.  8,  1885. 
A  delicate  test  for  nitric  acid  is  recommended  by  Prof.  Uffelmann  : 
Add  to  a  small  piece  of  diphenylamine,  of  about  the  size  of  half  a 
lentil,  placed  in  a  porcelain  capsule,  1*5  cc.  H2SO4,  which  must  be 
absolutely  free  from  NOg  and  HNO3 ;  stir  with  a  glass  rod  until  a 
very  pale  pink  color  is  produced,  and  add  3  or  4  drops  of  the  liquid 
to  be  tested,  on  the  border  of  the  capsule.  Much  HNO3  will  instan- 
taneously cause  the  appearance  of  a  bluish  line,  extending  like  a  cloud. 
Slight  traces  of  HNO3  give  that  line,  after  a  short  while,  mostly  within 
a  minute,  and  this  line  also  extends  and  becomes  more  intense.  The 
