376 
Anthemis  Cotula — Chemical  Investigation. 
Am.  Jour.  Pharm. 
A-Ug.,  1885. 
1 : 10.  A  solution  is  also  officinal  consisting  of  potassium  iodide  5, 
iodine  1  and  glycerin  40. 
The  gum  resins  of  ammoniac,  asafetida  and  galbanum  are  purified  by 
emulsionizing  them  with  about  an  equal  weight  of  hot  water,  adding 
about  half  their  weight  of  strong  alcohol,  pressing  through  rather 
coarse  linen  and  evaporating  by  means  of  a  water-bath. 
Grajeas  are  granules,  the  strength  directed  being  O'l  Gm.  for  mono- 
bromated camphor,  0*05  Gm.  for  the  valerianates  of  quinine,  iron  and 
zinc;  0*025  Gr.  for  ammonium  valerianate;  0*01  Gr.  for  codeine  and 
narcotine ;  0*001  for  arsenious  acid,  arseniates,  strychnine,  morphine  and 
Homolle's  digitalin ;  0*0b05  Gm.  for  aconitine,  atropine  and  zinc  phos- 
phide; and  0*00025  Gm.  for  Nativelle's  digitalin. 
HISTOLOGICAL  AND  CHEMICAL  EXAMINATION  OF 
ANTHEMIS  COTULA,  Linne. 
By  George  Edward  Hurd,  Ph.G. 
From  an  Inaugural  Essay. 
After  a  full  botanical  description,  the  histology  of  the  plant  is 
described  and  illustrated  by  drawings,  mostly  microscopical,  upon 
seven  plates.  In  the  older  stem  we  usually  find  about  twelve  to  four- 
teen wedges  separated  by  rather  wide  medullary  rays.  The  cambium 
line  is  very  distinct.  The  rather  thick  bark  is  composed  of  an  external 
layer  of  cubical  cells,  a  row  of  rounded  or  elongated  parenchyma  cells, 
and  several  rows  of  incomplete  parenchyma  containing  large  quantities 
of  chlorophyll.  The  bast  fibers  are  comparatively  large  and  are  in 
bundles  joined  to  the  wood  wedges  which  are  composed  of  small,  round 
thick-walled  pleurenchyma,  with  numerous  scattered  ducts.  The  pith 
contains  intercellular  spaces  and  cells  with  acicular  crystals  of  oxalate 
of  calcium.  Upon  longitudinal  section  we  find  the  ducts  near  the 
cambium  line  to  be  all  spiral  ducts,  while  those  in  the  inner  portions 
of  the  wood  wedges  are  pitted.  The  oil  glands  are  found  in  the  disk 
florets,  and  also  on  the  stem  and  leaves  of  the  plant.  Those  of  the 
florets  are  found  sparingly  in  the  petals  usually  near  the  margins, 
and  appear  like  a  globular  mass  raised  above  the  other  tissue ;  they 
are  of  a  yellow  color  which,  however,  disappears  on  macerating  the 
florets  for  some  time  in  alcohol.  In  the  leaves  we  find  oil  cells  both 
on  the  upper  side  and  on  the  lower  surface.    Those  on  the  upper 
