These  symptoms  are  accompanied  by  mental  and  physical  depression,
with  malaise  and  restlessness.  The  circulation  is  depressed,  the  spleen
slightly  enlarged.  In  a  considerable  proportion  of  the  cases  catarrhal
phenomena  do  not  occur  and  the  attack  consists  of  a  fever-storm  with  its
associated  phenomena,  together  with  rapidly  developing  asthenia,  more
or  less  profound.  The  cases  may  in  general  be  grouped  as  mild  and  severe.
In  mild  cases  the  chill  may  be  slight  or  absent  altogether.  Headache
and  muscle  pains  are  moderate.    There  is  a  sense  of  weariness  upon  effort.
Fia.   236, — luflucDu — Kmil-


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di^nclination  for  affairs,  some  difficulty  in  fixing  the  attention.  Coryza,
erythematous  angina,  and  a  tickling  cough  occur.  The  fever  is  usually
slight,  the  temperature  not  rising  above  102°  F.  (39°  C).  Many  of  the
patients  suffering  from  influenza  in  this  form  are  able  to  continue  their
ordinary  avocations.  No  great  intensification  of  the  symptoms  is  neces-
sary, however,  to  compel  them  to  betake  themselves  to  bed.
in  the  severer  cases  the  chill  is  more  marked  or  the  shivering  more
prolonged.  Fever  is  rapidly  establishc<i,  the  acme  being  reached  within
twenty-four  or  thirty-six  hours.  The  temperature  may  rise  to  104°  or
105°  F,  (40''-40.5'*  C).  Sensations  of  heat  alternate  with  chilliness.  There
is  pain  in  the  orbits  and  at  the  root  of  the  nose.  Coryza  is  severe.  Epi-
staxis  is  occasionally  observed.  The  throat  is  sore;  there  are  tickling  sen-
sations in  the  upper  air-passages,  hoarseness,  and  sometimes  dyspncra.
