A 
ri.craer 
JO      /laceo         /  /^ooo'"''^'^'^ 
(3  /l-ifsjr 
G 
/•/coo  1 
• 
CHART  2. 
This  chart  shows  the  whole  or  a  part  of  the  kymograms  taken  in  7  experi- 
ments on  the  isolated,  guinea  pig's  uterus.  Contractions  7,  8  and  9  in  A  show 
the  diminishing  effect  of  succeeding  doses  of  cotton  root  bark.  Compare  con- 
tractions 6  and  10  for  the  effect  of  ergot  before  and  after  cotton  root  bark.  Note 
the  first  four  contractions  for  comparison  of  cotton  root  bark  with  pituitary  ex- 
tract. Kymograms  B,  C,  D  and  F.  G  and  others  show  a  comparison  with  ergot. 
F  shows  a  diminished  effect  of  pituitary  extract  after  cotton  root  bark  and  an  in- 
creased effect  after  ergot.  E  gives  the  effect  of  alcohol  and  shows  that  the  effect 
of  cotton  root  bark  must  be  discounted  to  the  extent  of  the  effect  of  the  alcohol. 
