A^ugast,T907.rm'}    Pennsylvania  Pharmaceutical  Association.  369 
characteristic  well-known  light  reddish-brown  color,  transparent  in 
certain  lights  and  slightly  opalescent  in  others. 
The  coloring  matter  of  the  preparation  is  due  to  the  resinous 
principle  santalin,  which  colors  the  compound  tincture  of  lavender 
used  in  the  preparation,  and  when  the  compound  tincture  of  lavender 
is  added  to  the  hot  solution  of  potassium  arsenite  before  diluting  to 
the  official  quantity,  a  marked  precipitation  of  the  coloring  matter 
in  the  form  of  a  reddish  flocculent  deposit  was  noted.  This  precipi- 
tation was  not  obtained  in  the  finished  preparation  as  properly 
made,  even  after  some  minutes'  boiling,  and  it  is  probable  that  the 
variation  in  color  results  from  adding  the  compound  tincture  of 
lavender  at  too  early  a  stage  in  the  process. 
Note  on  the  Action  of  Some  Antiseptics  on  Some  Starch- 
Converting  Enzymes. 
Henry  Leffmann. 
It  is  well  known  that  the  starch-digesting  enzymes  are  restrained 
by  salicylic  acid  and  similar  substances.  The  author  believed  that 
the  restraining  action  was  dependent  in  part  upon  the  ratio  between 
the  amount  of  enzyme  and  the  restraining  agent.  Some  experi- 
ments were  performed  which  proved  to  be  very  interesting.  It  was 
found  that  small  proportions  of  the  antiseptic  acted  as  a  stimulant, 
and  larger  proportions  as  a  depressant.  The  antiseptics  experi- 
mented with  were  salicylic  acid,  alcohol  and  oil  of  cassia,  the  latter 
being  tried  because  it  has  been  used  for  keeping  starch  solutions  in 
the  laboratory.  The  experiments  are  too  few  to  form  a  basis  for 
generalization,  but  are  suggestive  for  further  investigation. 
Chemistry  in  the  Store  Window. 
F.  P.  Stroup. 
Some  suggestions  are  offered  for  interesting  and  novel  window 
displays,  which,  by  reason  of  their  being  somewhat  out  of  the 
ordinary,  ought  to  attract  attention  to  the  fact  that  the  pharmacist 
is  more  than  a  mere  purveyor  of  merchandise. 
Silver  Tree. — Dissolve  two  ten-cent  pieces  in  2  fluidrachms  of 
concentrated  nitric  acid,  evaporating  nearly  to  dryness  to  drive  off 
excess  of  acid,  cool,  and  dissolve  the  resulting  crystalline  salts  in 
sufficient  distilled  water  to  make  a  saturated  solution.    This  solu- 
