With  the  patient  included  in  circuit  in  the  manner  shown
in  the  diagram  we  do  not  know  the  value  of  the  inductance
and  resistance  offered  by  him.  The  arrangement  of  two
condensers  of  small  capacity  is  conducive  to  the  produc-
tion of  oscillatory  currents  of  relatively  high  frequency,
and  such  currents  will  be  produced  if  the  patient  offers  a

*  Extract  from  "  Radio-Therapy,"  Freund  :  "  In  the  year  1881  Morton  de-
scribed a  method  of  using  electricity  for  the  local  treatment  of  muscle  and
nerve  disorders.  He  brought  the  terminals  of  the  discharger  of  an  electrical
machine  so  near  together  that  sparks  passed  between  them.  He  then  put  his
patient  in  the  circuit  connecting  the  tin-foils  of  the  condensers.  Morton  was
the  first  to  produce  by  means  of  this  arrangement  and  to  therapeutically  apply
high-frequency  currents,  for  he  had  used  the  oscillating  character  of  the  con-
denser-discharge to  increase  the  frequency  of  an  alternating  current.  The  con-
densers were  charged  in  this  case  through  an  induction  apparatus.  Morton's
high-tension  oscillating  currents  have  been  used  by  Leduc  and  F.  Winkler  in
similar  affections,  and,  of  course,  with  results  similar  to  those  produced  by
other  forms  of  high-frequency  apparatus."


THE  STATIC  INDUCED  CURRENT


29


sufficiently  low  resistance  and  inductance.  In  the  July,
1903,  issue  of  Medical  Electrology  and  Radiology,  Dr.
Manders  expressed  the  opinion  that  the  impedance  (sum
of  the  resistance  and  inductance)  of  the  circuit  including
the  patient  may  be  so  great  as  to  render  the  current
unidirectional  by  damping  out  the  oscillations  which  the
condensers  of  small  capacity  tend  to  ])roduce."

"  The  term  *  static-induced  '  apj)lied  by  Dr.  W.  J.  Mor-
ton to  this  arrangement,  made  by  him  in  1881,  is  techni-


Fl'i.  4.     Amiiguineut  for  tliu  .*?l;ilic  liiducocl  C'urifUt.
