82  Gleanings  from  the  German  Journals.  {Am'Feb.,ri8Sarm 
solution.  For  outside  use  a  crude  solutol  is  offered  which,  however, 
owing  to  impurities  of  pyridine  and  hydrocarbons,  has  a  disagree- 
able odor  ;  for  the  disinfecting  of  rooms,  etc.,  an  odorless,  pure 
solutol  is  manufactured.  For  surgical  disinfection  a  neutral  solution 
of  cresol  in  sodium-cresol  is  sold  under  the  name  of  solveol ;  used  in 
one-half  per  cent,  solution  it  is  less  poisonous  than  a  phenol  solution 
of  equal  efficacy  (2-3,  and  in  some  cases  5  per  cent.).  It  is  miscible 
with  any  kind  of  water,  forming  a  perfectly  clear  solution. — J.  Reich, 
Oesterr.  Ztschr.f.  Pharm.,  1891,694. 
Hcemol  and  Hcemogallol  are  two  preparations  containing  iron, 
which  for  easy  assimilation  far  surpass  any  compound  previously 
used  ;  they  were  first  prepared  by  Prof.  Kobert  by  the  action  of 
reducing  agents  upon  the  blood-coloring  matter ;  in  the  first-men- 
tioned zinc-dust  is  used  (a  minute  quantity  of  zinc  is  allowed  to 
remain  in  this  preparation  as  it  exerts  a  favorable  action  in  certain 
defects  of  the  stomach  and  intestines) :  in  the  last  mentioned,  pyro- 
gallol  is  used ;  the  former  is  a  dark  brown,  the  latter  a  red  brown 
powder.  The  dose  ranges  from  o- 1-0-5  gm-  three  times  a  day;  an 
agreeable  form  of  administration  was  found  in  chocolate  tablets, 
each  representing  a  little  over  one  milligram  metallic  iron,  one  to 
be  taken  fifteen  minutes  before  meals.  Patents  have  been  applied  for, 
for  these  two  preparations. —  Oesterr.  ZtscJir.f.  PJiarm.,  1891,  724. 
Guaiacolum  carbonicnm  is  the  latest  of  the  patented  guaiacol 
preparations ;  it  is  made  by  dissolving  two  molecules  guaiacol  in  the 
proper  quantity  of  sodium  hydrate  solution  and  then  slowly  passing 
carbonyl  chloride  (one  molecule)  through  the  solution  ;  the  pre- 
cipitated carbonate  is  washed  with  soda  and  water  and  recrystal- 
lized  from  alcohol.  It  has  the  formula  CO  (OC6H4OCH3)2,  is  soluble 
in  hot  alcohol,  ether,  chloroform  and  benzol,  insoluble  in  water  and 
nearly  so  in  cold  alcohol ;  it  forms  an  odorless  and  tasteless  crystal- 
line powder,  melting  at  85 0  C.  It  is  easily  saponified  by  alkalies  and 
taken  internally  this  change  is  produced  in  the  intestines,  the  pro- 
ducts formed  being  guaiacol  and  carbonic  acid. — J.  Reich,  Oesterr. 
Ztschr.f.  Pharm.,  1891,  725. 
Aristolochin  is  the  name  given  by  Dr.  J.  Pohl  to  the  active  prin- 
ciple of  the  seeds  of  Aristolochia  Clematitis  and  the  roots  of  A.  rotunda 
and  A.  longa.  The  powdered  drugs  were  exhausted  with  petro- 
leum-ether, which  removed  chlorophyll,  oil  and  a  gelatinous,  nitro- 
