^jS^i^s?™'}    Fast-growing  Variety  of  Cinchona,  345 
1.  Gaseous  hydrochloric  acid  gas  imparts  a  splendid  purplish-red 
color. 
2.  Perchloride  of  phosphorus  gives  a  red  color,  turning  to  blue  and 
finally  to  green  when  a  moderate  heat  is  applied. 
3.  Heated  with  a  little  nitric  acid,  a  purplish-red  color  is  produced, 
which  changes  to  violet  and  blue. — Ibid.,  June,  p.  439. 
Wine  of  Creasote. — Dr.  Fournier  gives  the  following  formula  :  6 
grams  of  beechwood  tar  creasote  are  dissolved  in  125  grams  of  alcohol; 
to  the  solution  is  added  simple  syrup  400  grams,  and  enough  Malaga 
wine  to  make  one  liter.  Each  tablespoonful  contains  '30  gram  of 
creasote,  and  the  dose  is  readily  taken  in  a  glass  of  sweetened  water. — 
four,  de  Phar.  et  de  Chlm.,  May,  p.  377. 
The  formula  of  Bouchard  and  Gimpert  is  as  follows:  Creasote  13*5 
grams,  alcohol  250  grams,  tincture  of  gentian  30  grams  and  Malaga 
wine  sufficient  for  I  liter. — V  Union  Phar.,  May,  p.  132. 
Caustic  of  Chloride  of  Zinc. — Under  the  name  of  Pate  de  Can- 
quoin  a  preparation  is  used  in  France  which,  according  to  the  Codex, 
is  prepared  by  dissolving  chloride  of  zinc  in  a  small  quantity  of  water 
and  adding,  with  continual  trituration,  an  equal  weight  of  flour.  P. 
Carles  has  found  this  to  be  too  hygroscopic,  and  proposes  to  triturate 
in  a  mortar  10  grams  of  fused  chloride  of  zinc  ^vith  2  grams  of  60  per 
cent,  alcohol,  and  incorporating,  with  constant  trituration,  15  grams  of 
wheat  flour.  This  mass  may  be  formed  into  cylinders  of  suitable  size, 
and  when  once  dry  is  but  little  affected  by  atmospheric  humidity.  The 
author  has  kept  samples  in  stopped  vials  for  over  three  years  without 
noticing  any  alteration.— U  Union  Phar.,  April,  p.  100. 
THE  FAST-GROWING  VARIETY  OF  CINCHONA 
CALLED  PUBESCENS. 
By  J.  E.  Howard,  F.R.S. 
I  send  a  few  facts  to  complete  (thus  far)  the  history  of  the  above 
promising  sort,  to  which  Dr.  de  Vrij  has  very  properly  called  attention 
in  your  columns  (April  13)  ;  and  respecting  which  I  had  much  corres- 
pondence with  the  late  Mr.  Mclvor. 
It  is  about  ten  years  since  this  skillful  cultivator  raised  from  seed 
two  sorts  of  officinalis,  which  for  some  reason  he  considered  to  be  hybrid 
with  C.  succirubra.    The  two  were  alike  distinguished  by  strong  and 
