140 
Progress  in  Pharmacy. 
C  Am.  .Tonr.  IMiarm. 
(       March,  1903. 
ing  keratin,  such  as  the  bristles  of  the  hog,  feathers  of  geese,  horns 
of  oxen  and  the  hair  and  nails  of  dogs. 
The  arsenic  content  appears  to  be  cumulative,  particularly  when 
accompanied  by  keratin,  as  Gautier  demonstrates  that  the  various 
portions  of  older  animals  contain  more  arsenic  than  the  younger. 
Cineol  Arsenate. — This  is  said  to  be  a  stable  combination,  made 
by  adding  an  aqueous  solution  of  arsenic  acid  to  oil  of  eucalyptus. 
When  freshly  prepared  it  is  white,  with  crystalline  characteristics. 
Gradually  heated  cineol  arsenate  melts  at  95 °  C.  It  is  soluble  in 
alcohol  or  ether,  but  decomposed  into  its  constituents  by  water. 
[Phar.  Centralhalle \  1902,  page  651.) 
Hopogan. — According  to  the  Chemist  and  Druggist  (1902,  page 
846)  this  is  but  another  tradename  for  magnesium  dioxide  or  biogen. 
Dermogen  is  the  corresponding  salt  of  zinc,  consisting  of  a  vari- 
able mixture  of  zinc  oxide  with  zinc  dioxide.  It  is  recommended 
as  a  local  application,  as  a  dusting  powder  or  in  ointments. 
Helmitol. — This  is  a  formaldehyde  compound  that  has  been 
recommended  as  an  improvement  on  hexamethyltetramin.  Chemi- 
cally, it  is  said  to  be  the  methylencitrate  of  hexamethyltetramin. 
It  is  to  be  given  in  doses  of  1  gramme  two  or  three  times  a  day. 
(Apothek.  Zeit.,  1903,  page  43.) 
Methylatropine  Bromide. — This  is  said  to  possess  several 
advantages  over  simple  atropine ;  it  is  soluble  in  water  or  dilute 
alcohol.  Two  drops  of  a  1  per  cent,  solution  instilled  into  the  eye 
are  said  to  dilate  the  pupil,  and  that  the  effect  of  this  dilation  wears 
off  within  four  hours. 
Doses  of  0-005  to  o-oio,  given  once  a  day,  are  said  to  control 
the  nightsweats  of  phthisis  without  any  of  the  secondary  effects 
noticeable  with  atropine  or  any  of  the  other  preparations  of  bella- 
donna.   [Apoth.  Zeit.,  1903,  page  42.) 
Oxygen. — An  apparatus  for  generating  chemically  pure  oxygen 
from  tablets  or  pastilles  of  sodium  dioxide  is  figured  and  described 
on  page  672  of  the  Pharmaceutische  Centralhalle  (1902). 
This  apparatus  is  being  put  on  the  market  by  an  Austrian  firm, 
under  the  tradename,  oxygenophor  (oxygen  generating  apparatus). 
It  is  quite  simple  of  construction,  consisting  of  a  metallic  vessel 
having  three  divisions,  the  lower  of  which  contains  the  sodium 
dioxide,  the  middle  one  containing  water,  and  the  upper  one  also 
containing  water  with  which  to  wash  the  liberated  gas. 
