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66


CLTDE  BROOXB  AND  ABNO  B.  LDCKHABDT


Thraefore,  from  now  on,  as  the  arterial  pulsations  are  further  aug-
mented it  is  easier  to  provide  the  increased  fluctuation  of  the  volume
of  the  arterial  tube  by  extra  expansion  with  extra  stretching  of  tjie  walls
during  systole,  than  by  extra  compres-
sion with  extra  flattening  of  the  already
almost  completely  collapsed  vessel.  This
requires  that  the  mean  of  maximal  trans-
mitted  oscillation  shall  turn  a,bout  and
instead  of  moving  upward  ehall  move
downward,  or  shall  not  move  upward,
or  at  least  shaU  not  move  upward  as  fast
as  before,  i.e.,  upward  or  downward  as  re-
gards the  height  of  the  cuff  or  outside
pressure.  Somuchfortheeffect  of  altera-
tions in  amplitude  of  arterial  pulse  on  the
location  of  the  mean  point  of  maximal
transmitted  osciUations.  A  similar  dis-
cussion could  be  carried  through  either  as
regards  calibre  of  manometer;  resistance
of  vessel;  or  calibre  of  vessel.  However,
since  the  philosophy  is  very  much  the
same  in  all  these  factors,  it  is  deemed
unnecessary  to  go  through  it  here.
