378  American  Pharmaceutical  Association.  { ^j^f 
Barometer  Paper  and  Sympathetic  Inks.  — Dr.  Bering  makes  a  very  delicate 
reddish  barometer  paper,  turning  blue  at  a  slight  rise  in  the  temperature,  by  satura- 
ting paper  with  a  solution  of  cobalt  sulphocyanide,  made  by  mutual  decomposition 
between  potassium  sulphocyanide  and  cobalt  sulphate.  Other  colors  are  prepared 
as  follows  : 
Brorun. — Potassium  bromide  i  part,  copper  sulphate  i  part,  water  20  parts  ,•  mix.. 
This  sympathetic  ink  turns  brown  on  heating. 
Yelloivtsh-Green. —  Cobalt  chromate  J  part,  nitric  acid  and  sodium  chloride  each  1 
part,  dissolved  in  20  parts  water. 
Yellow—  Dissolve  equal  parts  of  cobalt  and  sodium  chloride. — Apoth.  Ztg.,  March 
15,  1879,  P-  46. 
Silvering  Solution  for  Glass. —  A  solution  of  2  grams  siiver  nitrate,  1  gram  aqua 
ammonia?,  3  grams  alcohol  and  3  grams  water  are  mixed  and  the  mixture  filtered  at 
the  expiration  of  a  few  hours.  Another  liquid  is  prepared  by  mixing  0*25  gram 
grape  sugar,  8  parts  water  and  8  parts  alcohol,  and  likewise  filtered.  The  articles 
to  be  silvered  are  then  placed  into  a  bath  containing  equal  parts  of  both  clear  liquids 
and  heated  to  65°C. — Pharm.  Ztschr.f.  Russl '.,  Feb.  1,  1879,  P-  84,  from  Metallarb. 
Atramin  Ink  and  Stamping  Color. — The  following  processes  are  said  to  yield 
durable  and  very  cheap  black  ink  : 
1 .  For  small  quantities :  Dissolve  20  grams  of  atramin  in  \  liter  of  lukewarm  water. 
2.  For  large  quantities  :  Mix  3  kilos  atramin  into  a  paste  with  500  grams  hydro- 
chloric acid  and  a  little  water.  After  a  few  hour?,  mix  well  with  1500  grams  of 
glycerin,  1500  grams  of  a  syrup  solution  of  burnt  sugar  and  50  liters  of  hot  water. 
Stir  occasionally  for  a  day,  allow  it  to  stand  for  24  hours  and  decant  the  clear  super- 
natant liquid. 
Office  Ink  is  made  in  the  same  manner,  except  that  the  quantity  of  water  is- 
increased  to  75  or  80  liters. 
School  Ink  is  the  preceding  kind,  to  which  are  added  the  washings  of  the  residue 
obtained  with  about  5  liters  of  hot  water. 
Durable  Stamping  Ink  is  made  by  triturating  sufficient  atramin  in  a  mortar  with 
boiling  water  into  a  uniform  thick  paste,  heating  and  adding  the  same  quantity  of 
glycerin  as  atramin — Pharm.  Ztg.,  March  19,  1879,  P-  I74- 
AMERICAN  PHARMACEUTICAL  ASSOCIATION. 
The  twenty-seventh  annual  meeting  will  be  held  in  the  city  of  Indianapolis,, 
Indiana,  on  the  second  Tuesday  in  September  (being  the  9th  day  of  September), 
1879,  at  3  o'clock  P.  M. 
Arrangements  are  being  made  by  the  pharmacists  of  Indianapolis  to  get  a  reduc- 
tion of  fare  from  all  points  of  the  United  States  and  Canada,  and  there  will,  no 
doubt,  be  a  large  gathering. 
Indianapolis  is  of  easy  access  from  all  parts  of  the  country,  a  great  railroad  centre, 
and  pleasantly  located.  Our  friends  in  the  West  will  give  us  a  hearty  welcome  and 
try  and  make  our  stay  as  enjoyable  as  possible. 
