MANUFACTURE  OF  SULPHIDE  OF  CARBON. 
157 
residue,  leaves  behind  the  superphosphates  of  the  alkalies  and 
of  lime.  The  fat  consists  of  oleine,  margarine,  mixed,  according 
to  Goblej,  with  a  large  amount  of  glycero-phosphoric  acid,  as 
also  with  cerebrin,  also  knowp  as  cerebric  or  oleo- phosphoric 
acid.  This  last  named  acid  contains  nitrogen  and  phosphorus, 
and  is  also  found  as  a  constituent  of  the  brain.  The  presence 
of  cholesterine,  the  fat  of  the  bile,  has  also  been  determined  in 
the  yolk,  which  contains  of  it  on  an  average  0*438  per  cent. 
Of  the  two  pigments  of  the  yolk,  the  yellow  and  the  red, 
which  both  are  soluble  in  alcohol,  the  red  one  contains  iron. 
Besides  this  metal  other  minerals  are  contained  in  the  yolk,  as 
hydrochlorate  of  ammonia,  potassic  compounds,  which  greatly 
predominate  over  the  chlorides  and  phosphates,  found  in  the 
ashes  only  monobasic.  The  ashes  contain  as  much  as  70  per 
cent,  of  phosphoric  acid,  1*45  per  cent,  of  peroxide  of  iron, 
and  about  0*55  per  cent,  of  silica.  Altogether  we  find  here  the 
constituents  of  the  blood  ready  formed  in  the  same  proportion 
as  they  are  contained  in  that  fluid,  besides  some  constituents  of 
the  brain  and  bile,  which  accounts  for  the  easy  digestibility  of 
the  yolk,  its  assimilation  not  taxing  the  digestive  organs  in  as 
high  a  degree  as  a  dietary  article  of  a  more  remote  constitutional 
resemblance.  To  complete  this  sketch  of  similarity  we  find  the 
vitelline,  a  compound  of  caseine  and  albumen,  easily  soluble  in 
even  dilute  solutions  of  the  neutral  salts,  the  presence  of  which 
in  the  yolk  I  mentioned,  and  easily  convertible  into  peptones. 
As  much  as  17  per  cent,  of  vitelline  are  present  in  the  yolk.  For 
practical  use  as  a  dietary  preparation,  I  would  suggest  the  addi- 
tion of  sugar  to  the  glyconine,  to  render  it  dry  and  solid,  while 
the  addition  of  syrup  would  produce  a  pleasant  tasting  liquid 
preparation,  which  besides  in  its  natural  state,  might  be  used  as 
a  vehicle  for  various  drugs,  as  the  tonics,  &c. — Proc.  Amer. 
Pharm.  Assoc. ,  1869. 
MANUFACTURE  OF  SULPHIDE  OF  CARBON, 
By  M.  Contet. 
As  a  proof  of  the  greatly  improved  mode  of  manufacture  of 
this  substance  and  its  very  extensive  use,  the  author  begins  by 
stating  that,  in  1840,  the  kilo,  of  rectified  sulphide  of  carbon 
