336  Serum  Treatment  of  Hay  Fever.      { ^nYub-^9P05arm' 
several  times,  and  during  the  same  the  ala  of  the  nostril  is  lightly 
tapped  with  the  ringer  to  distribute  the  powder  over  as  much  of 
the  mucous  membrane  as  possible. 
(2)  If  the  powder  is  also  to  be  used  for  the  eyes,  the  accompany- 
ing camel's  hair  brush  is  lightly  dipped  into  it,  the  brush  being 
then  gently  applied  to  the  inner  surface  of  the  attached  lower  lid,  or 
a  small  quantity  of  the  powder  may  be  shaken  upon  it  from  the 
brush.  With  each  new  bottle  of  the  powder  a  new  brush  should 
also  be  brought  into  use. 
The  additional  points  for  the  application  are  covered  by  the 
directions  given  for  treatment  with  the  liquid  pollantin. 
Whether  the  serum  is  used  in  its  fluid  or  powdered  form,  the 
method  of  using  it  should  be  strictly  in  conformity  with  the  direc- 
tions given. 
In  addition  to  the  use  of  the  serum,  rational  prophylactic  meas- 
ures should  also  be  observed  during  the  hay-fever  season,  for  only 
in  this  way  can  good  results  be  obtained. 
The  first  measure  of  prophylaxis  consists  in  properly  protecting 
the  body  during  the  hours  of  sleep,  when  the  reflexa  which  are  ex- 
cited by  pollen  (sneezing,  coughing  and  lachrymation)  are  more  or 
less  quiescent,  from  the  invasion  of  the  pollen  influence.  The  win- 
dows and  doors  of  the  sleeping-room  must  remain  closed,  as  far  as 
possible,  during  the  hay-fever  season;  also  the  windows  on  the 
windward  side  of  the  house.  The  washed  garments  which  have 
been  bleached  upon  the  lawn  should  be  thoroughly  beaten  before 
they  are  used,  and  the  clothing  should  be  carefully  brushed  before 
the  house  is  entered. 
Self-understood,  no  flowering  plants  whose  pollen  may  induce 
hay  fever,  must  be  suffered  to  remain  in  the  house. 
The  pollen  should  be  applied  to  the  mucous  membrane  as  early 
in  the  day  as  possible,  preferably  on  awakening,  even  though  there 
may  be  no  immediate  evidence  of  irritation.  The  application  should 
be  repeated  several  times  during  the  day,  and  always  in  anticipation 
of  the  causes  for  the  expectant  severer  attack. 
Therefore,  before  walking  in  the  open,  riding  or  wheeling,  and 
above  all  at  appearance  of  the  slightest  irritating  indications. 
The  latest  application  for  the  day  should  not  be  immediately  be- 
fore retiring,  but  an  hour  or  two  previous,  for  otherwise  the  serum 
may  form  a  sticky  crust  upon  the  mucous  membrane.    As  a  rule, 
