A  January,  ^gi9m^      Churchill's  Tincture  of  Iodine,  37 
then  pounded  and  mixed  with  water,  which  becomes  milky,  and 
which  is  sprayed  or  brushed  over  the  plants  with  a  bunch  of 
feathers."  (Leonard  Wray,  Pharm.  J.  and  Trans.,  Vol.  52,  July 
23,  1892,  p.  62.) 
Derris  uliginosa  Benth. 
In  India  it  is  known  to  act  as  a  poison  upon  worms  and  the  larvae 
of  insects  which  trouble  the  cultivators,  whence  the  Marathi  name 
Kirtana,  or  "worm-creeper."  (Proc.  Am.  Pharm.  Assoc.,  Vol.  50, 
1902,  p.  322.) 
Desmodium  laburnifolium  DC.  Fabacece. 
The  leaves  are  used  as  an  insecticide.    (GreshofT,  191 3.) 
Diarthron  vesiculosum  Endl.    Thymeleacece . 
Dichrophyllum  marginatum  (Pursh)  Kl.  &  Garcke.,  Euphor- 
bia margin  ata  Pursh.  Euphorbiacece.  White-margined 
Spurge.    Minn,  to  Texas. 
The  decoction  gave  negative  results  when  applied  to  cotton 
worms  {Aletia).  (Riley.) 
An  insecticide.    (Burkill,  quoted  by  GreshofT,  1913.) 
Diospyros  Malacapai  A.  DC.  Ebenacece. 
The  wood  serves  as  an  insect  repellent.  (GreshofT.) 
{To  be  continued) 
CHURCHILL'S  TINCTURE  OF  IODINE.1 
History,  Experiments  and  Improved  Formulas. 
By  Herbert  C.  Raubenheimer,  Phar.D. 
Discovery  of  Iodine. 
Pharmacists  not  only  helped  in  the  development  of  their  own 
profession  but  also  that  of  medicine  and  chemistry.  Little  did  Ber- 
nard Courtois,  the  French  apothecary,  when  he  discovered  iodine  in 
181 1,  know  of  the  great  usefulness  of  this  element  and  its  prepara- 
tions in  pharmacy,  chemistry  and  medicine. 
Bernard  Courtois  was  born  in  Dijon  in  1777.  He  was  appren- 
ticed to  the  pharmacist  Fremy  at  Auxere  in  1804.  On  account  of 
the  great  scarcity  of  natural  saltpetre  or  potassium  nitrate  during 
1  Thesis  submitted  in  course  for  degree. 
