I  20        Sixth  Decennial  P harmacopceia  Convention.  {  '""pib.yissor"^ 
New  Cement  for  Filling  Teeth.— It  consists  of  the  pyrophoNphates  of  calcium 
and  barium,  with  that  of  zinc  or  magnesium,  and  is  made  by  Rostagni  by  fusing 
together  in  a  crucible  calcium  phosphate  and  zinc  phosphate,  pouring  out  the  mass, 
powdering,  dissolving  in  dilute  phosphoric  acid  and  evaporating  to  a  syrupy  con- 
sistence. The  liquid  is  mixed  with  a  powder  prepared  by  triturating  3  kilograms 
zinc  oxide  with  from  5  to  50  grams  boracic  acid  and  a  little  water;  the  mass  is  dried, 
heated  to  redness  for  a  few  hours,  and,  after  cooling,  is  powdered.  For  use  the  pow- 
der is  formed  into  a  paste  with  water. —  Pharm.  Ztschr.f.  Russl ,  Nov.  13,  1879,  p. 
693,  fr.  Dingl.  Journ, 
A  white  tooth  powder,  which  turns  red  when  moistened,  is  made  by  reducing  to  a 
fine  powder  cochineal,  15  grains,  and  alum,  \  drachm,  and  mixing  with  powdered, 
orris  root,  i  ounce;  cream  of  tartar,  jo  drachms;  carbonate  of  magnesium, 
drachm  ;  powdered  cuttle-fish  bone,  5  drachms,  and  oil  of  rose,  5  drops. — Pharm, 
Ztschr.f.  Russl. ,  from  Ztschr.d.  Oest.  Ap.  Ver. 
Anilin  Inks. — Dr.  Siemens  publishes  the  formulas  : 
Red. — Dissolve  i  part  diamond  fuchsin,  soluble  in  water,  in  150  or  200  parts  hot 
water. 
Blue.-^i  part  "bleu  de  nuit"  (bleu  de  Paris)  to  200  or  250  parts  hot  water. 
Violet. — I  part  blueish-violet  analin  in  200  parts  water. 
Green. — Dissolve  i  part  iodine  green  in  100  or  110  parts  hot  water;  it  writes 
bhiish-greeii.    If  a  yellowish-green  lustre  is  desired,  a  little  picric  acid  is  added. 
Telloiv. — (Anilin  is  not  advisable.)     i  part  picric  acid  in  120  or  140  parts  water. 
Black — t  part  nigrosin,  soluble  in  water,  is  dissolved  in  80  pnrts  water. 
These  anilin  inks  are  very  bright,  never  precipitate  tiie  coloring  matter,  flow 
readily,  dry  quickly,  do  not  mould,  and  can  be  readily  liquefied  again  when  dried 
up.  They  should  not  be  made  too  concentrated,  should  not  be  used  with  a  new 
pen,  and  require  dilution  with  water  in  case  the  writing  has  a  coppery  lustre.  If  an 
addition  of  gum  is  desired,  which  is  generally  not  necessary,  i  part  dextrin  may  be 
added  to  100  parts  of  ink,  but  never  gum  arabic. — Pharm.  Ztg.^  Dec.  3,  1879. 
SIXTH  DECENNIAL  PHARMACOPCEIA  CONVENTION. 
By  virtue  of  authority  devolved  upon  me  as  the  last  surviving  officer  of  the  Phar- 
macopatia  Convention  of  1870,  I  again  call  the  attention  of  "the  several  incorpo- 
rated State  medical  societies,  the  incorporated  medical  colleges,  the  incorporated 
colleges  of  physicians  and  surgeons  and  the  incorporated  colleges  of  pharmacy 
throughout  the  United  States,"  to  the  importance  of  appointing  delegates  to  the 
sixth  decennial  pharmacopoeia  convention,  and  of  sending  the  names  and  residences 
of  the  same  to  me  for  publication.  The  convention  meets  on  the  first  Wednesday 
in  May,  1880,  and  I  am  required  "to  publish  the  names  and  residences  of  the  dele- 
gates, for  the  information  of  the  medical  public,  previous  to  its  meeting." 
