^""jvi^^m™  }  '  Varieties.  lOl) 
ARIETIES 
Hhoe-blaoking. — Mix  rapeseed  oil,  1  liter,  with  syrup  2*5  kilos ;  water,  5 
kilos,  and  ivory-black,  5  kilos;  then  add  slowly,  stirring  constantly,  sul- 
phuric acid,  2'5  kilos,  when  the  mixture  becomes  hot  and  thick  ;  finally, 
stir  in  water,  2*5  kilos. 
Another  formula  is  as  follows  :  Mix  intimately  fine  ivory-black,  6  parts; 
s.yrup,  28  parts  ;  sugar,  4  parts  ;  fisli  oil,  3  i)arts  ;  and  sulphuric  acid,  1  i^art ; 
set  aside  for  8  hours  and  stir  into  the  mixture  decoction  of  tan,  4  parts; 
ivory-black,  18  parts,  and  sulphuric  acid,  3  parts,  when  the  mass  may  be 
poured  into  boxes. 
Shoe-blacking  free  from  sulphuric  acid  is  made  as  follows:  Boil  extract 
of  logwood,  1  part,  and  bruised  nut-galls,  30  parts  with  25  times  their  weight 
of  strong  vinegar,  express  the  liquid,  add  copperas,  8  43arts,  and  set  aside 
for  twenty-four  hours  ;  decant  the  clear  liquid  and  add  gum-arabic,  8  jiarts  ; 
rock  candy,  100  parts,  and  syrup,  80  parts;  strain  and  mix  with  alcohol,  50 
parts  ;  solution  of  shellac,  40  parts,  and  finally,  powdered  indigo,  40  parts. — 
Zeitschr.  (E^ter.  Apoth.  V<  r.,  1882.  p.  435;  from  Polyt.  NotlzhL 
Rubber  Lubricator  for  Belts. — 5  parts  of  India  rubber  are  cut  fine 
and  melted  together  with  5  parts  oil  of  turpentine  in  an  iron,  well-covered 
vessel;  then  add  4  parts  of  rosin,  stir  well,  melt  and  add  4  j^arts  of  yellow 
wax,  stirring  constantly  while  melting  This  mixture  while  warm  is  added , 
with  constant  stirring,  to  a  melted  mixture  of  15  parts  fish  oil  and  5  parts 
of  tallow,  and  the  whole  is  agitated  until  it  has  congealed.  The  mass  is  ap- 
plied to  old  belts  upon  both  sides  in  a  warm  place,  and  when  the  belts  are 
in  use,  from  time  to  time  upon  the  inner  side.  By  this  treatment  they  be- 
come very  durable. — Chem  Centralblatt,  1882,  p.  768. 
Cement  for  Aquaria,  Stone,  Wood,  and  Glass. — Bienert  recom- 
mends the  following  :  Melt  together  crude  gutta  percha  and  black  pitch,  of 
each,  10  parts,  and  common  turpentine,  1  part.  The  mass  may  be  rolled 
into  sticks,  which,  for  use,  are  melted  like  sealing-wax.  The  proportion 
of  turpentine  is  varied  according  to  the  hardness  of  the  pitch. — Rundschau^ 
1882,  p.  686 ;  from  Phar.  Zett.  Russl. 
Cement  for  Geass. — Dissolve  finely  cut  caoutchouc,  1  part,  in  chloro- 
form, 64  i^arts,  add  finely  powdered  mastic,  16  parts  and  macerate  until 
dissolved.  The  cement  is  applied  with  a  brush.  A  larger  j^roportion  of 
caoutchouc  renders  the  cement  elastic. — Zeitschr.  CEst.  Aj^oth.  Fer.,  1882,  p, 
435  ;  from  Polyt.  Notizbl. 
Paste  for  Labels,  suitable  for  bottles,  is  made  by  soaking  glue  in 
strong  vinegar,  then  heating  to  boiling  and  adding  Hour.  The  paste  is  very 
adhesive,  and  in  a  wMde-mouthed  bottle  may  be  preserved  without  decom- 
position.—Z^i^sc/^r.  G£st.  Apoth.  Ver.^  1882,  p.  435;  from  Polyt.  Notizbl. 
