NEW  PROCESS  FOR  THE  PREPARATION  OF  PHOSPHORUS.  215 
tie  which  contains  it.  The  jelly  thus  formed  will  partially  dissolve, 
yielding  a  liquid  which  is  thicker  than  benzine,  and  may  be  ob- 
tained very  clear  by  filtration  and  rest.  The  residue  may  be 
separated  by  straining,  and  will  furnish  an  excellent  water-proof 
composition.  As  for  the  liquid  itself,  it  incorporates  easily 
with  all  fixed  or  volatile  oils.  It  dries  very  fast,  and  does  not 
shine,  unless  mixed  with  resinous  varnishes.  It  is  extremely 
flexible,  may  be  spread  in  very  thin  layers,  and  remain  unaltered 
under  the  influence  of  air  and  light.  It  may  be  employed  to 
varnish  geographical  maps  or  prints,  because  it  does  not  affect 
the  whiteness  of  the  paper,  does  not  reflect  light  disagreeably 
as  resinous  varnishes  do,  and  is  not  subject  to  crack  or  come  off 
in  scales.  It  may  be  used  to  fix  black  chalk  or  pencil  drawings  ; 
and  unsized  paper,  when  covered  with  this  varnish,  may  be 
written  on  with  ink. — Journ.  Frank.  Inst.,  1862,  from  Ga- 
lignani. 
ON  A  NEW  PROCESS  FOR  THE  PREPARATION  OF  PHOSPHORUS. 
By  M.  Cari-Montraud. 
Taking  advantage  of  the  long-established  fact  of  the  decom- 
position at  a  high  temperature  of  dry  phosphate  of  lime  mixed 
with  carbon  by  hydrochloric  acid,  M.  Cari-Montraud  founds 
upon  this  reaction  a  new  process  for  the  preparation  of  phos- 
phorus. 
Calcined  bones  finely  powdered  are  mixed  with  sufficient  pul- 
verised wood  charcoal  to  convert  all  the  oxygen  of  the  tribasic 
phosphate  of  lime  into  oxide  of  carbon.  The  mixture  is  put 
into  fire-proof  earthen  cylinders,  glazed  inside,  which  are  three 
parts  filled.  These  cylinders  being  made  red-hot,  a  current  of 
hydrochloric  gas  is  passed  in  at  one  of  the  extremities. 
Under  these  circumstances  the  phosphate  of  lime  decomposes 
immediately.  Chloride  of  calcium,  oxide  of  carbon,  hydrogen, 
and  free  phosphorus  are  formed. 
The  phosphorus  is  distilled,  and  is  conducted,  together  with 
the  oxide  of  carbon,  the  hydrogen,  and  the  excess  of  hydro- 
chloric gas,  by  means  of  a  copper  adapter,  into  a  vessel  filled 
with  cold  water,  where  the  phosphorous  vapors  are  condensed. 
