from  Lightning  at  Purfleet.  25  5 
though  the  model  was  moved  along  the  frame  from  its 
fixed  ftation  to  more  than  the  diftance  of  forty-three 
inches. 
exp.  11.  When  a conductor  of  the  fame  length  with 
the  former,  but  rounded  at  the  end,  and  no  more  than, 
three  tenths  of  an  inch  in  diameter,  was  put  in  the  place 
of  the  pointed  one,  every  other  circumftance  continuing 
the  fame,  the  fmall  ftrearn  of  light  appeared  again ; but 
upon  moving  the  model  a little  beyond  the  diftance  of 
fixteen  inches,  it  totally  difappeared. 
first  observation.  By  the  firft  experiment  it  was 
manifeft,  that  the  point  adted  upon  the  charge  all  the 
time  the  model  was  moving  through  a fpace  equal  to 
forty-three  inches;  and  confequently  was,  all  that  time, 
diminiibing  the  charge  in  the  great  cylinder.  On  the 
other  hand,  the  fecond  experiment  fhewed,  that  the 
rounded  end  asfted  upon  the  charge  only  whilft  the  mo- 
del moved  through  a fpace  equal  to  fixteen  inches.  And 
from  the  two  experiments  compared,  it  appears,  that  a 
charged  body  is  exhaufted  of  more  of  the  fluid  by  a 
pointed,  than  by  a blunted,  conductor. 
exp.  hi.  If  in  the  place  of  the  rounded  conductor  a 
fimilar  one  was  put,  but  about  one-fifth  of  the  length, . 
whilft  the  model  flood  diredlly  under  the  great  cylinder 
