AmkJa°yTi9^8.arm'}         T1lC  NCW  Rcincdies  of  IOIJ.  365 
settle  as  it  forms.  After  half  an  hour  the  supernatant  liquid  is 
siphoned  off  and  filtered  through  paper. 
Verification  of  strength  should  be  made  from  time  to  time  by 
means  of  decinormal  sodium  thiosulphate ;  10  Cc.  of  the  solution 
should  require  from  12  to  13  Cc.  of  the  thiosulphate,  equivalent  to 
0.45  to  0.50  per  cent,  of  sodium  hypochlorite.  A  simple  method  for 
the  preparation  of  eusol  is  described.  Stock  solutions  of  liquor 
calcis  chlorinatae,  B.  P.,  and  boric  acid  (4  per  cent.)  are  used,  135 
Cc.  of  the  former  being  diluted  to  750  Cc,  and  250  Cc.  of  the  boric 
acid  solution  added.  This  gives  a  liter  of  solution  of  the  desired 
strength;  should  it  be  required  for  intravenous  injection,  8.5  Gm.  of 
sodium  chloride  dissolved  in  250  Cc.  of  water  is  added  in  place  of 
portion  of  the  water  used  to  dilute  the  chlorinated  solution. 
A  solution  of  hypochlorous  acid  suitable  for  wound  treatment 
may  be  produced  by  the  passage  of  electricity  through  normal  saline. 
If  sea  water  be  substituted  for  normal  saline,  a  powerful  disin- 
fectant is  produced,  and  this  process  has  been  adopted  on  board  hos- 
pital ships  with  much  success. 
The  "  Carrel  method  "  of  employing  hypochlorous  antiseptic  so- 
lution has  been  so  widely  used,  and  is  so  frequently  referred  to,  that 
a  word  or  two  regarding  it  may  be"  given  here.  This  method  con- 
sists essentially  of  three  operations:  (1)  thorough  opening  up  and 
cleansing  of  the  wound;  (2)  continued  irrigation,  by  suitable  appa- 
ratus, with  Dakin's  solution  or  chloramine-T  solution;  (3)  regular 
bacteriological  control  by  examination  of  smears  from  the  wound. 
The  irrigation  is  given  through  fenestrated  rubber  tubes,  resembling 
drainage  tubes,  and  closed  at  one  end ;  these  are  connected  with  a 
branched  glass  tube,  which  in  turn  is  connected  with  a  glass  reservoir 
containing  the  antiseptic.  The  bacteriological  examination  is  made 
every  second  day,  the  results  being  entered  on  a  suitable  chart,  and 
when  organisms  are  absent  from  the  wound  on  three  successive  days, 
the  wound  is  regarded  as  sterile.  There  seems  little  doubt  that  the 
Carrel  method  has  come  to  stay — for  the  duration  of  the  war  at 
least. 
A  development  of  Chloramine-T  or  sodium  para-toluene  sulpho- 
chloramide  has  been  effected  in  Dichloramine-T,  which  is  toluene 
parasulphodichloramine.  Chloramine-T  being  insoluble  in  liquid 
paraffin,  it  was  impossible  to  use  it  as  a  nasal  spray  in  this  medium.. 
Dichloramine-T,  however,  is  soluble  in  eucalyptol,  and  this  solution 
can  be  diluted  with  liquid  paraffin  so  as  to  make  a  nasal  spray.  As 
