INJUNCTIONS  IN  COPYEIGHT  CAUSES  521


puted,  or  doubtful,  questions  of  fact  must  be  resolved       §  1432
against  the  plaintiff.-^  doXfui  *""

A  demurrable  complaint  will  prevent  a  prelim-  facts,
inary  injunction.^^     The  only  allegations  essential       §  1433
to  confer  jurisdiction  upon  the   Court,  in  a  bill  burof'com°^
seeking   an   injunction   are,   however,    appropriate  piamt  for
allegations  showing  that  the  plaintiff  is  the  proprie-
tor of  a  copyright  and  that  it  has  been  infringed  by
the  defendant.^^^-  g  ^^^^

The  proof  requisite  to  obtain  a  preliminary  injunc-  Essentials  of

/•  1  11  •    1  i.    1  T    •  IT  -XT     affidavits  to

tion  where  the  copyrighted  work  is  one  dealing  with  procure  tem-
common   materials,  was   discussed   in   an  English  porary  in-

.        junction.
