During  the  10  years  when  this  experiment  was  going  on
measles  was  introduced  139  times  and  from  these  cases  115
cross  infections  resulted,  less  than  one-third  as  many  as
occurred  when  attention  was  not  focused  on  the  prevention
of  contact  infection.  A  suggestive  instance  is  reported  of  a
child  with  measles  who  remained  for  24  hours  in  an  open
ward  with  many 'susceptibles,  and  it  is  stated  that  in  the
3  cases  which  later  developed  there  had  been  contact  with
the  first  patient,  either  direct,  or  by  freshly  infected  fomi-
tes.  At  the  Pasteur  Hospital  126  cases  of  measles  were
cared  for  without  a  single  cross  infection.  At  the  Provi-
dence City  Hospital  which  was  opened  in  March,  1910,
many  different  diseases  are  cared  for  in  rooms  open  most
of  the  time  into  a  common  corridor  as  in  the  Pasteur  Hos-
pital, while  other  mixed  cases  are  "  barriered  "  in  other
wards,  as  described  on  pages  200  to  202.  Up  to  September,
1911,  56  cases  of  measles  had  been  admitted,  with  extension
in  only  one  instance  to  one  child.1  Since  then  there  have
been  two  small  outbreaks  which  Richardson  thinks  were
most  likely  not  due  to  aerial  infection  but  to  some  failure
in  technique.  One  of  these  outbreaks  arose  from  a  single
case,  though  at  other  times  several  cases  had  been  cared  for
at  one  time  without  extension.  In  this  outbreak  one  of
the  cases  was  on  a  different  floor  from  the  infecting  case.
Rohmer2  from  his  hospital  experience  at  Cologne  is  satisfied
that  measles  is  not  air-borne  further  than  between  adjoin-
ing beds.
English  Hospital  Experience.  —  Most  English  hospital
superintendents  who  have  tried  cubicles  and  barriers  do

1  Richardson,  Internal.  Hosp.  Rec.,  1911,  XV,  18.
2  Rohmer,  Jahrb.  f.  Kinderheilkunde,  1912,  LXXV,  78.
