VARIETIES. 
18i 
On  "Glyconine" — anew  Glycerols? — To  obtain  this  compound,  M.  Ed- 
mond  Sichel  employs  4  parts  (by  weight)  of  yolk  of  egg,  and  5  parts  of 
glycerin,  which  he  mixes  simply  in  a  mortar.  It  has  the  consistence  of 
liquid  honey,  and  is  unctuous  like  the  fatty  substances,  over  which  it  has 
the  advantage  of  being  easily  removed  by  water.  It  is  unalterable,  a 
specimen  having  been  left  exposed  to  the  air  for  three  years  with  impu- 
nity. Applied  to  the  skin,  it  forms  on  the  surface  a  varnish,  which  pro- 
tects it  from  the  contact  of  the  air.  These  properties  render  it  seviceable 
for  broken  surfaces  of  all  kinds,  particularly  for  burns,  erysipelas,  and 
cutaneous  affections,  in  which  it  soothes  the  itching,  and  also  for  sore 
nipples  ;  its  harmlessness  prevents,  in  the  latter  case,  any  interruption  of 
suckling. — Journal  de  JPharmacie,  September,  1866.  Extracted  from  Bul- 
letin de  Therapeutique. 
Emulsion  of  Tar. — M.  Jeannel  recommends  the  following  form  for  this 
preparation : — 
Crystals  of  carbonate  of  soda  .        .     1  part  (by  weight) 
Wood  tar  .        .        .        .        .1  part  «« 
Water       .....  100  parts  " 
Mix  the  tar  and  carbonate  of  soda  intimately  in  a  porcelain  mortar,  intro- 
duce the  mixture  into  a  large  flask  containing  the  water,  shake  vigorously 
for  several  minutes,  and  filter.     This  emulsion  mixes  with  water  in  all 
proportions.    The  quantity  of  tar  cannot  be  increased  advantageously  by 
using  a  larger  proportion  of  carbonate  of  soda,  for  the  author  finds  that 
with  two  per  cent,  of  carbonate  of  soda  and  of  tar,  a  brown  mixture  is 
formed,  which  soon  deposits  a  black  fluid  resin. —  Chem.  and  Drug.,  Dec.  15, 
1866,  from  Journal  de  Pharmacie. 
Solubility  of  Iodine  in  Tannin. — Iodine  is  known  to  be  more  soluble  in 
water  containing  tannin  than  in  pure  water.  M.  Roller  has  found  that 
to  dissolve  one  gramme  (about  15<|  grains)  in  450  grammes  (about  14 \  oz. 
Troy)  of  water  at  120°  F.,  the  latter  must  contain  3-29  grammes  (about 
50  grains)  of  tannin.  By  raising  the  temperature,  the  proportion  of  tan- 
nin  may  be  diminished.  Pure  water  dissolves  more  iodine  than  water 
containing  sugar. —  Chem.  and  Drug.  Dec.  15,  1866,  from  Zeitsclirift  f. 
CI  tern  ie. 
On  Resins  for  Varnishes. — Br  M.  Violette. — The  resins,  Calcutta  co- 
pal and  its  congeners,  as  well  as  amber,  which  form  the  basis  of  var- 
nishes, are  not  in  their  crude  state  soluble  in  ether,  oil  of  turpentine,  ben- 
zine, petroleum,  and  other  hydrocarbons,  nor  in  vegetable  oils.  They 
